{"id":252913,"date":"2026-08-10T09:30:00","date_gmt":"2026-08-10T13:30:00","guid":{"rendered":"https:\/\/ibkrcampus.com\/campus\/?p=252913"},"modified":"2026-08-10T09:47:52","modified_gmt":"2026-08-10T13:47:52","slug":"fair-value-weather-climate-friday-august-7-2026","status":"publish","type":"post","link":"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/prediction-market\/fair-value-weather-climate-friday-august-7-2026\/","title":{"rendered":"Fair Value Weather &amp; Climate \u2014 Friday, August 7, 2026"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>A detailed daily look at some of the most interesting weather and climate prediction markets at ForecastEx and elsewhere.<\/em><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"578\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-1100x578.png\" alt=\"\" class=\"wp-image-252914 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-1100x578.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-700x368.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-300x158.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-768x403.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66-1536x806.png 1536w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-66.png 1600w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/578;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1.27\u00b0F<\/strong>, ForecastEx ranks 1st of 12. Average error on daily highs, 7 days, 5:00 PM ET day before through 5:00 AM ET. Aviation Forecast next at 1.57\u00b0F<\/li>\n\n\n\n<li><strong>6\u00b0F<\/strong>, Largest error, Boston high. Settled 85\u00b0F against 91\u00b0F from the American model<\/li>\n\n\n\n<li><strong>9.5\u00d7<\/strong>, Best return on daily temperatures yesterday, net of fees. Yes on the Oklahoma City low below 75\u00b0 at 10\u00a2, priced 32 hours before it resolved and 13 hours before the low itself happened, settled 74\u00b0<\/li>\n\n\n\n<li><strong>30%<\/strong>, At least one major Atlantic hurricane in August. a Yes contract at 30\u00a2 pays 3.3\u00d7 the money put in, net of fees<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Access to live probabilities and the ability to trade is available via <\/em><a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/#\/?category=g137800\"><em>IBKR Prediction Markets<\/em><\/a><em>.<\/em><\/li>\n\n\n\n<li><em>General primers on how these prediction markets work are available in the <\/em><a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/en\/home.php\"><em>IBKR prediction markets FAQ<\/em><\/a><em> (scroll down) and the <\/em><a href=\"https:\/\/forecastex.com\/faq\"><em>ForecastEx FAQ<\/em><\/a><em>.<\/em><\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-1-how-forecastex-temperature-markets-compared-with-the-weather-models-on-thursday\" class=\"wp-block-heading\"><strong>1) How ForecastEx temperature markets compared with the weather models on Thursday<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Below is a scorecard for the daily temperature forecasts as they stood at 5:00 PM ET on Wednesday, August 5th for the target day of Thursday, August 6th. The highs and lows are shown as separate grids below. Each grid below orders its cities by <a href=\"https:\/\/en.wikipedia.org\/wiki\/Mean_absolute_error\">mean absolute error<\/a> (MAE) for that metric, which is the average size of the miss in degrees, ignoring whether it was too warm or too cold, from largest to smallest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ForecastEx is scored against eleven public forecast tools throughout this letter, all listed with links in the FAQ at the end. The grids below pull out four canonical tools for illustration: the American model, the European model, the National Weather Service, and the Aviation Forecast.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"1479\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-1100x1479.png\" alt=\"\" class=\"wp-image-252916 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-1100x1479.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-700x941.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-300x403.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-768x1032.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68-1143x1536.png 1143w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-68.png 1487w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/1479;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The largest errors on Thursday were in Boston, where the five systems averaged 4.3\u00b0F on the high. Four cities averaged more than 3\u00b0F on the highs, and the four largest single high errors of the day all came from the American model, each of them too warm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Postmortem on the Boston miss.<\/strong> The high reached 85\u00b0F in Boston, whereas all of the other five systems were at least three degrees warmer, with the American model 6 degrees warmer. On Wednesday, the National Weather Service office in Boston was expecting advisory-level heat, <a href=\"https:\/\/forecast.weather.gov\/product.php?site=BOX&amp;issuedby=BOX&amp;product=AFD\">writing<\/a> that a warm and humid air mass with dew points of 72 to 76 would translate to highs in the upper 80s to the mid-90s. Temperatures were warming throughout the day as expected until, at around noon, the wind swung from southwest to east-southeast, an onshore turn after which the temperature fell for the rest of the afternoon (black observed line vs. purple dashed line below).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"843\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-1100x843.png\" alt=\"\" class=\"wp-image-252923 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-1100x843.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-700x537.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-300x230.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-768x589.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73-1536x1177.png 1536w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-73.png 1837w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/843;\" \/><\/figure>\n\n\n\n<h3 id=\"h-forecast-accuracy-and-its-utility\" class=\"wp-block-heading\"><strong>Forecast accuracy and its utility<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The standings below measure overall forecast accuracy, indicating that ForecastEx has been the most accurate tool of the 12 publicly available tools tracked here over the past 7 days.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"684\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-1100x684.png\" alt=\"\" class=\"wp-image-252915 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-1100x684.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-700x435.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-300x187.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-768x478.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67-1536x955.png 1536w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-67.png 1600w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/684;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This constitutes <a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/prediction-markets-might-already-be-the-best-source-for-todays-weather-forecast\/\">ongoing evidence<\/a> that weather prediction markets like ForecastEx may be the most accurate short-range weather forecasts available, and the difference becomes greater as lead time decreases.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Daily weather forecasting is one of the most mature, established, and scientifically principled fields of science and industry. It is not an exaggeration to describe conventional weather forecasting systems as the frontier of applied physics, statistics, and computer science, resting on decades, if not centuries, of scientific inquiry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As such, conventional weather forecasts should hardly represent a target ripe for a novel forecasting system to improve upon. Despite the formidable challenge, ForecastEx prediction markets seem to be doing just that, not just echoing public forecasts but aggregating dispersed information in a way that improves upon sophisticated established systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is possible because prediction markets are not substitutes for standard forecasts but rather sit downstream of them. They incorporate conventional forecast information as one input and convert it into refined probabilities through direct financial rewards for being accurate and direct financial penalties for being inaccurate. This creates a dual effect of attracting accurate individuals and systems into the market while deterring those who are inaccurate. People or systems that consistently make poor forecasts are heavily motivated to either improve or leave the market.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This improvement in accuracy is valuable for a variety of reasons. For example, wholesale electricity is bought and sold a day ahead in regional markets run by grid operators, with prices settling at benchmark trading hubs within each region, and the primary cause of daily variations in electricity demand and prices is variations in temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The figure below pairs two cities&#8217; daily mean temperature with the daily electricity demand of the region serving it, defined by the <a href=\"https:\/\/www.eia.gov\/electricity\/gridmonitor\/\">Energy Information Administration<\/a>, and with the day-ahead price at the region&#8217;s trading hub, over the past 30 days.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"1379\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-1100x1379.png\" alt=\"\" class=\"wp-image-252919 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-1100x1379.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-700x878.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-300x376.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-768x963.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71-1225x1536.png 1225w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-71.png 1594w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/1379;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In the two examples above, the temperature-electricity demand correlation runs from 0.84 in New York City to 0.94 in Chicago, both positive because in the cooling season a hotter day means more electricity demand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The dots past the divider are Friday&#8217;s implied forecast from the ForecastEx market and the demand and price that temperature implies through the fitted relationships over the past 30 days.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Friday indicates 2 percent above the 30-day average demand in Chicago at $51 per megawatt hour, and 15 percent above it in New York City at $102 per megawatt hour.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Improving forecast accuracy is critical, but just as critically, if not more so, the structure of these contracts allows for direct hedges for industries exposed to high prices. Buying Yes contracts on lower-probability temperature extremes entails disproportionately large return multiples that would compensate for the associated disproportionately large electricity price spikes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On average, no public tool beats ForecastEx consistently, but the trade board below asks the narrower question of where a single tool could potentially be used to identify edge in particular circumstances.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 id=\"h-the-most-undervalued-contracts-for-thursday-were\" class=\"wp-block-heading\"><strong>The most undervalued contracts for Thursday were<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"1158\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-1100x1158.png\" alt=\"\" class=\"wp-image-252917 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-1100x1158.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-700x737.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-300x316.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-768x809.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69-1459x1536.png 1459w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-69.png 1600w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/1158;\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>Access to live probabilities and the ability to trade is available via <\/em><a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/#\/?category=g137800\"><em>IBKR Prediction Markets<\/em><\/a><em>.<\/em><\/li>\n\n\n\n<li><em>General primers on how these prediction markets work are available in the <\/em><a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/en\/home.php\"><em>IBKR prediction markets FAQ<\/em><\/a><em> (scroll down) and the <\/em><a href=\"https:\/\/forecastex.com\/faq\"><em>ForecastEx FAQ<\/em><\/a><em>.<\/em><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The most undervalued contract above was Yes on the <a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/?utm_source=googlead&amp;utm_medium=paid_search&amp;utm_campaign=US_ForecastTrader_C&amp;utm_term=%22market+predictions%22&amp;utm_campaign_id=23792472669&amp;placement=search#\/?category=g137800\">Oklahoma City low<\/a> below 75 degrees, 10 cents 32 hours before it resolved and 13 hours before the low itself arrived at 4:52 AM, for a 9.5 times return net of fees.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seven of the ten most undervalued contracts on the highs were No positions, and the National Weather Service was the closest public tool on seven markets across both metrics.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 id=\"h-2-atlantic-hurricane-forecast-contracts-still-no-hurricanes\" class=\"wp-block-heading\"><strong>2) Atlantic hurricane forecast contracts, still no hurricanes<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"1533\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-1100x1533.png\" alt=\"\" class=\"wp-image-252920 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-1100x1533.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-700x976.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-300x418.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-768x1071.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72-1102x1536.png 1102w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-72.png 1434w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/1533;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The highest-priced landfall market on the map above is <a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/?utm_source=googlead&amp;utm_medium=paid_search&amp;utm_campaign=US_ForecastTrader_C&amp;utm_term=%22market+predictions%22&amp;utm_campaign_id=23792472669&amp;placement=search#\/?category=g137800\">the Bahamas<\/a>, where the probability of a major hurricane landfall stands at 10.6%, or 11 cents for the Yes contract. The probability of a Category 4 United States landfall (by November 30th) stands at 8%, which represents the seasonal forecasts and is not influenced by any current storm. The same question trades at <a href=\"https:\/\/polymarket.com\/event\/will-any-category-4-hurricane-make-landfall-in-the-us-in-before-2027\">Polymarket<\/a> at around 18 cents.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The probability of a major hurricane making landfall within 50 miles of Miami-Dade, Florida currently stands at around 5%. Thus, a purchase of a &#8220;Yes&#8221; at 5 cents is an analog to parametric insurance, where the occurrence of a disaster based on a simple weather parameter would pay out, in this case 18X of the purchase price.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/www.cpc.ncep.noaa.gov\/products\/precip\/CWlink\/ghazards\/\">CPC Global Tropical Hazards Outlook<\/a>, a weekly product from the NOAA Climate Prediction Center issued on Tuesdays and covering the period from August 12th to August 25th, emphasizes that strong El Ni\u00f1o-related shearing combined with unfavorable phasing of the Madden-Julian Oscillation later in August is inhibiting tropical cyclone formation.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Google DeepMind&#8217;s cyclone-focused ensemble weather model, <a href=\"https:\/\/arxiv.org\/abs\/2506.10772\">FNV3<\/a>, shows some slight possibilities of tropical cyclone formation in the Atlantic main development region next week.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1100\" height=\"1385\" data-src=\"https:\/\/www.interactivebrokers.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-1100x1385.png\" alt=\"\" class=\"wp-image-252918 lazyload\" data-srcset=\"https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-1100x1385.png 1100w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-700x881.png 700w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-300x378.png 300w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-768x967.png 768w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70-1220x1536.png 1220w, https:\/\/ibkrcampus.com\/campus\/wp-content\/uploads\/sites\/2\/2026\/08\/image-70.png 1588w\" data-sizes=\"(max-width: 1100px) 100vw, 1100px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1100px; aspect-ratio: 1100\/1385;\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two named storms have formed against the 2.1 the season would normally have produced by now if it finishes at the total forecast by the hurricane research team at <a href=\"https:\/\/tropical.colostate.edu\/forecasting.html\">Colorado State University<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 id=\"h-frequently-asked-questions\" class=\"wp-block-heading\"><strong>Frequently asked questions<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 id=\"h-what-is-a-weather-prediction-market\" class=\"wp-block-heading\"><strong>What is a weather prediction market?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A market in which each contract pays one dollar if a stated weather outcome occurs and nothing if it does not, so the contract&#8217;s price is the market&#8217;s probability of that outcome. ForecastEx lists these on daily high and low temperatures at individual weather stations, on Atlantic named storm and hurricane counts, and on major hurricane landfall by location, among many others.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 id=\"h-what-are-the-four-canonical-forecast-systems-compared-here\" class=\"wp-block-heading\"><strong>What are the four canonical forecast systems compared here?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">All four commonly referenced forecast systems rely on physical <a href=\"https:\/\/en.wikipedia.org\/wiki\/Numerical_weather_prediction\">numerical weather prediction<\/a> models that solve the equations of the atmosphere forward in time. <a href=\"https:\/\/www.ecmwf.int\/en\/forecasts\/documentation-and-support\/medium-range-forecasts\">ECMWF<\/a> (the European model) and <a href=\"https:\/\/www.emc.ncep.noaa.gov\/emc\/pages\/numerical_forecast_systems\/gfs.php\">GFS<\/a> (the American model) are shown here in their raw form. Raw physical models are flexible and can handle weather situations they have never seen (they are not explicitly trained on historical data but rather adhere to the laws of physics), but forecasts apply to a relatively large discrete grid box that contains the <a href=\"https:\/\/data.forecastex.com\/regulatory\/UTermsandConditions.pdf\">weather station<\/a> rather than the single point where the station sits, causing them to carry systemic biases relative to the stations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/lamp\">Aviation Forecast<\/a> is a <a href=\"https:\/\/en.wikipedia.org\/wiki\/Model_output_statistics\">model output statistics<\/a> system. It compares historical forecasts from physical models with what actually occurred and uses the errors to statistically correct systemic biases at the level of individual weather stations. The tradeoff is that a statistical fit is anchored in past situations and bends less readily to a genuinely unusual one. The <a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/ndfd\">National Weather Service&#8217;s National Digital Forecast Database<\/a> is undergirded by the <a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/nbm\">National Blend of Models<\/a> but layers on human forecasters&#8217; judgment, which is more flexible in dynamic weather situations but introduces subjective judgment (more on all of this <a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/daily-high-temperature-markets-at-forecastex\/\">here<\/a>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h3 id=\"h-what-are-all-the-forecast-tools-used-here\" class=\"wp-block-heading\"><strong>What are all the forecast tools used here?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/ndfd\">National Weather Service<\/a> \u2014 the official public forecast, human judgment layered on model guidance; that judgment is subjective and can lag a fast-changing day.<\/li>\n\n\n\n<li><a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/lamp\">Aviation Forecast<\/a> \u2014 statistically corrected to each station and strong inside a day; reaches only about 25 hours and is anchored in past situations.<\/li>\n\n\n\n<li><a href=\"https:\/\/vlab.noaa.gov\/web\/mdl\/nbm\">National Blend of Models<\/a> \u2014 averaging many models cancels much of their individual error; a blend can be slow to commit when the models genuinely split.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.ecmwf.int\/en\/forecasts\/documentation-and-support\/medium-range-forecasts\">European model<\/a> \u2014 consistently among the most accurate global physical models; raw grid-box output still carries station-level bias.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.emc.ncep.noaa.gov\/emc\/pages\/numerical_forecast_systems\/gfs.php\">American model<\/a> \u2014 a global physical model updated four times a day; prone to systematic warm or cold stretches in conditions it resolves poorly.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.dwd.de\/EN\/research\/weatherforecasting\/num_modelling\/01_num_weather_prediction_modells\/icon_description.html\">German model<\/a> \u2014 a modern global physical model with strong mid-latitude performance; the same grid-box limitations as its peers.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.dwd.de\/EN\/ourservices\/met_application_mosmix\/met_application_mosmix.html\">German statistical model<\/a> \u2014 station-calibrated output built on multiple physical models; anchored in past relationships between forecast and outcome.<\/li>\n\n\n\n<li><a href=\"https:\/\/weather.gc.ca\/model_forecast\/model_e.html\">Canadian model<\/a> \u2014 an independent global physical model whose errors differ usefully from the American and European models; raw station-level accuracy is middling.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.metoffice.gov.uk\/research\/approach\/modelling-systems\/unified-model\">UK model<\/a> \u2014 a long-developed global physical model; coarser at United States stations than the domestic systems.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.umr-cnrm.fr\/spip.php?article121&amp;lang=en\">French model<\/a> \u2014 an independent global physical model that adds diversity to the panel; raw station-level accuracy trails the leaders.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.jma.go.jp\/jma\/en\/Activities\/nwp.html\">Japanese model<\/a> \u2014 an independent global physical model; often the weakest of the panel on the daily-high standings, which is itself informative about model diversity.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-how-does-a-forecastex-ladder-become-a-single-forecast-temperature\" class=\"wp-block-heading\"><strong>How does a ForecastEx ladder become a single forecast temperature?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">ForecastEx does not publish a single forecast temperature. It lists a ladder of contracts at different strikes, and each price is the ForecastEx probability that the day&#8217;s extreme passes that strike. Comparing ForecastEx with the other systems therefore requires converting that ladder into a central estimate. The 50 percent level is the ForecastEx implied median, so where two adjacent listed strikes bracket that crossing, the central value is interpolated between them. Where the ladder does not bracket 50 percent, because every listed strike sits far in or far out of the money, no central value is recorded and ForecastEx is left unscored rather than extrapolated beyond the quoted ladder. That reflects how the strikes happened to be listed rather than anything about forecast quality, so it should count neither for nor against ForecastEx.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 id=\"h-further-reading\" class=\"wp-block-heading\"><strong>Further Reading<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prediction market basics<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/the-value-of-climate-prediction-markets\/\">The Value of Climate Prediction Markets<\/a> \u2014 The case for why prediction markets can represent the best collective knowledge about our energy and climate future.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/daily-high-temperature-markets-at-forecastex\/\">Daily High Temperature Markets at ForecastEx<\/a> \u2014 how the daily temperature contracts were built and settled when they were first listed (not all information is up to date and an update is forthcoming).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Temperature markets and energy<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/energy-expenditure-implications-of-next-day-temperature-forecasts\/\">Energy expenditure implications of next-day temperature forecasts<\/a> \u2014 what day-ahead temperature uncertainty costs utilities, energy traders and risk managers.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hurricane and climate contracts<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/esg\/hurricane-forecast-contracts\/\">Hurricane Forecast Contracts<\/a> \u2014 how the count and landfall contracts work.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/ibkr-climate-energy\/disaster-insurance-applications-of-forecast-contracts\/\">Disaster Insurance Applications of Forecast Contracts<\/a> \u2014 using landfall contracts as parametric cover.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/macro\/hurricane-forecast-contracts-as-a-diversifying-asset-in-an-investment-portfolio\/\">Hurricane Forecast Contracts as a Diversifying Asset in an Investment Portfolio<\/a> \u2014 correlation properties against conventional assets.<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/bundling-no-hurricane-landfall-forecast-contracts-to-reduce-downside-risk\/\">Bundling &#8220;NO&#8221; Hurricane Landfall Forecast Contracts to Reduce Downside Risk<\/a> \u2014 constructing a bundle across locations.<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-climate-contracts\" class=\"wp-block-heading\"><strong>Climate Contracts<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/commodities\/global-crop-yield-forecast-contracts\/\">Global Crop Yield Forecast Contracts<\/a> (<a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/?utm_source=googlead&amp;utm_medium=paid_search&amp;utm_campaign=US_ForecastTrader_C&amp;utm_term=%22market+predictions%22&amp;utm_campaign_id=23792472669&amp;placement=search#\/786030244\/product-details\/contracts?exchange=FORECASTX&amp;conid_yes=810314078\">view here<\/a>).<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/securities\/esg\/how-quickly-will-the-globe-warm-paris-agreement-forecast-contracts\/\">How Quickly Will The Globe Warm? Paris Agreement Forecast Contracts<\/a> (<a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/?utm_source=googlead&amp;utm_medium=paid_search&amp;utm_campaign=US_ForecastTrader_C&amp;utm_term=%22market+predictions%22&amp;utm_campaign_id=23792472669&amp;placement=search#\/854083920\/product-details\/contracts?exchange=FORECASTX&amp;conid_yes=905500573\">view here<\/a>).<\/li>\n\n\n\n<li><a href=\"https:\/\/www.interactivebrokers.com\/campus\/traders-insight\/will-the-atlantic-overturning-circulation-amoc-collapse-prediction-markets-can-quantify-sentiment\/\">Will the Atlantic Overturning Circulation (AMOC) Collapse? Prediction Markets Can Quantify Sentiment<\/a> (<a href=\"https:\/\/www.interactivebrokers.com\/predictionmarkets\/app\/?utm_source=googlead&amp;utm_medium=paid_search&amp;utm_campaign=US_ForecastTrader_C&amp;utm_term=%22market+predictions%22&amp;utm_campaign_id=23792472669&amp;placement=search#\/846784718\/product-details\/contracts?exchange=FORECASTX&amp;conid_yes=846784754\">view here<\/a>).<\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-about-the-author\" class=\"wp-block-heading\"><strong>About the author<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Patrick T. Brown is the Head of Climate Analytics at Interactive Brokers, where his work focuses on the information discovery and risk-transfer applications of prediction markets in weather, climate, and natural disasters.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">He holds a PhD in Earth and Climate Science from Duke University, a master&#8217;s degree in Meteorology and Climate Science from San Jose State University, and a bachelor&#8217;s degree in atmospheric and oceanic sciences from the University of Wisconsin, Madison. He is an adjunct faculty member (lecturer) in the Energy Policy and Climate Program at Johns Hopkins University and has conducted research at the Carnegie Institution at Stanford University, NASA JPL at Caltech, NASA Langley in Virginia, NASA Goddard in Washington, D.C., and NOAA&#8217;s GFDL at Princeton University. He has published scientific papers in Nature, PNAS, and Nature Climate Change, as well as many disciplinary journals, and his research and commentary have appeared in The New York Times, The Wall Street Journal, The Economist, CNBC, CNN, The BBC, The Washington Post, NPR, Newsweek, The Guardian, The Atlantic, Foreign Policy, and The Los Angeles Times, among other venues.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A detailed daily look at some of the most interesting weather and climate prediction markets at ForecastEx and elsewhere.<\/p>\n","protected":false},"author":1601,"featured_media":252927,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[18931,18929,3],"tags":[],"contributors-categories":[13576],"class_list":["post-252913","post","type-post","status-publish","format-standard","has-post-thumbnail","category-ibkr-climate-energy","category-prediction-market","category-traders-insight","contributors-categories-interactive-brokers"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.9 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Fair Value Weather &amp; Climate \u2014 Friday, August 7, 2026<\/title>\n<meta name=\"description\" content=\"A detailed daily look at some of the 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