Hurricane Prediction Markets: How Named-Storm Contracts Work
A hurricane prediction market is a set of event contracts on what a storm season will actually do: whether a hurricane makes landfall in a given state, how strong the strongest one gets, how many named storms the season produces. Each contract settles to $1 or $0 against official National Hurricane Center data, never against a forecast, and you can take either side. What makes storm contracts different from every other market in the weather category is their structure. The outcomes are not separate questions that happen to share a topic; they are nested inside each other, so one storm crossing one coastline can settle several contracts in the same afternoon. By the end of this piece you will be able to trace exactly how that happens, and why it changes how a careful trader thinks about holding more than one of them.
The Quick Answer
Hurricane and named-storm contracts are CFTC-regulated event derivatives that price specific season outcomes, mostly in three shapes: landfall (does one happen here), intensity (how strong), and count (how many). They settle on what the National Hurricane Center publishes, and because a single storm answers several of those questions at once, the contracts are strongly correlated and can resolve together. The three contract shapes, the settlement fine print that catches people, and a worked example of one storm settling five markets are all below.
The Three Questions A Storm Market Asks
Storm contracts come in three basic framings, and every ticker you will see is a version of one of them.
Landfall contracts ask whether a hurricane makes landfall in a defined place, a state or a stretch of coastline, within a defined window. Binary, yes or no.
Intensity contracts ask how strong: will a storm of at least a given Saffir-Simpson category form, or make landfall. The categories give these markets natural rungs. Hurricane status starts at sustained winds of 74 mph, a major hurricane at Category 3 means 111 mph or more, and Category 5 starts at 157 mph. "At least Category 3" contracts nest the same way the rungs of a temperature band ladder do: any outcome that settles the Category 4 contract YES settles the Category 3, 2 and 1 contracts YES with it.
Count contracts ask how many: the number of named storms, hurricanes, or major hurricanes a season produces, usually as a ladder of thresholds. A storm earns a name from the National Hurricane Center's list when it reaches sustained winds of 39 mph. For scale, an average Atlantic season in the 1991-2020 climate record produces about 14 named storms, 7 hurricanes and 3 major hurricanes across a season that runs June 1 through November 30.
Those three shapes are the whole menu. Everything unusual about these markets comes from how the shapes interact, and to see that, you first have to know who does the grading.
Settlement Comes From The National Hurricane Center
Every contract above settles against the National Hurricane Center, the federal office that names storms, tracks them, and publishes the official record of what each one did. Not a weather app, not a model run, not a landfall forecast cone: the NHC's own published determinations decide every contract. The market does not care what was predicted, only what the referee writes down.
That distinction does real work, because the official record is stricter than the eyeball version of events, and the gap between the two is where storm traders get caught:
- Landfall Has A Technical Definition. To the NHC it means the center of the storm's circulation crossing the coastline. A hurricane can drag its strongest winds across a beach town for hours while its eye stays a few miles offshore, and the official answer to "did it make landfall here" can still be no.
- Peak And Landfall Are Two Different Numbers. A storm that tops out at Category 5 over open water and comes ashore at Category 3 gives you two official intensities, and which one settles your contract depends entirely on whether the question asked about the storm's peak or its landfall.
- The Record Can Be Revised. The NHC revisits storms after the season in its post-storm reports, and intensity estimates sometimes change there. Each market's rules name the exact NHC publication and cutoff that governs.
Reading those rules is not optional homework; it is the trade.
If this sounds familiar, it should. Daily temperature contracts have the same property: they settle on one named weather station, not the city around it, and people lose money on the gap between the official number and the number they experienced. Storm markets are that lesson at season scale.
A Worked Example: One Storm, Five Settlements
Here is the structural point this article exists for, walked through with a single illustrative storm, start to finish.
Follow one storm the whole way through. It forms in the Gulf at the height of the season, earns its name when it reaches 39 mph, strengthens over warm water, and comes ashore in Florida with the NHC's official landfall intensity at Category 4. Trace that one storm across a season board:
| Contract | What this one storm does to it |
|---|---|
| Hurricane Makes Landfall In Florida This Season | Settles YES |
| Major (Category 3+) Hurricane Makes US Landfall This Season | Settles YES |
| A Category 4 Or Stronger Hurricane Makes US Landfall | Settles YES, and every lower category rung with it |
| Season Named-Storm Count | Ticked up one on the day it was named, weeks before landfall |
| Season Hurricane Count And Major-Hurricane Count | Each ticked up one as it crossed 74 mph, then 111 mph |
Five markets, one storm. Notice the timing detail in the fourth row: the count contract moved the day the storm was named, while the landfall contracts waited for the coastline. The pieces of the board resolve on different days, but one physical event is doing all of the resolving. The outcomes are correlated because they are downstream of the same storm, exactly the way contracts on fifteen cities under one heat dome are downstream of the same air mass. And the correlation cuts both ways: in a quiet season, the NO side of the landfall contract, the NO side of the major-hurricane contract and the low rungs of the count ladder all cash together too. A portfolio of storm contracts that looks diversified across five tickers can be one opinion about one season wearing five labels.
Count ladders add a wrinkle worth having in your head before you ever look at one mid-season: a running count can only rise. A mid-season named-storm count of 9 is not an estimate that might come down; it is a floor, the same logic as a daily high's running maximum, stretched across months instead of an afternoon. Rungs below the floor are dead, rungs above it are the only live question, and the price of each rung is a probability you can read off the ladder.
Why does correlation deserve this much ink? Because of the shape of the losing side. Selling an unlikely outcome, the far tail of a count ladder or a longshot landfall, collects a small premium and risks most of a dollar; one loss erases the premiums from roughly thirty or forty wins. That arithmetic is survivable when losses arrive one at a time, and ruinous when one Category 4 settles several of your positions against you in the same week, which is precisely what the nested structure makes possible. In storm markets, the unit of risk is not the contract. It is the storm.
An Instrument, Not A Spectacle
Worth being direct about what these markets are for, because the subject matter is not a game. Hurricanes destroy homes and take lives, and a market that prices them can look ghoulish at first glance. But pricing catastrophe risk is one of the oldest jobs in finance: insurers and reinsurers have traded hurricane exposure for decades, because someone has to hold that risk and it matters that it is priced honestly. An event contract is a small, public, exchange-traded version of the same instrument, regulated by the CFTC and open to anyone reading this. A coastal business that loses money every time a storm closes its doors is not being morbid when it takes a position that pays if one arrives; it is hedging, and price discovery on real risks is the social case for prediction markets generally.
That is also why the time to learn this instrument is a calm one. When a real storm is on the map, prices are already converging toward the answer as each NHC advisory lands, the cheap side of every related contract is gone, and attention belongs on the people in the storm's path, not on a screen. Understand the structure before the season gives you a reason to care about it. Nothing on this page is a pick, and it would not be one in September either.
If You Bet Sports, You Already Know This Shape
The structure translates directly. A season named-storm count is a win total; a landfall contract is a futures bet; the nested category rungs are the same ladder as a team's playoff, division and championship prices, where one outcome settles all three. Sports bettors also inherit the same correlation trap, since futures stacked on one team or one division are one opinion in several costumes. The difference is that sports prices come with a vig to beat, which is why price-checking tools exist for that side of the fence. Our +EV top bets screen does the line shopping across 100+ books and computes the no-vig fair price for each market, and our Liquidity Tool reads the money resting on exchange and prediction-market boards; the tool surfaces where the real size actually sits, the closest sportsbook-world cousin to watching a Kalshi ladder fill. On an exchange, by contrast, the price is the market's own consensus and the cost of trading is a small explicit fee rather than a margin hidden in the odds.
Hurricane Market FAQ
What is a hurricane prediction market? A set of exchange-traded event contracts on official storm-season outcomes: landfall in a defined area, storm intensity by Saffir-Simpson category, and counts of named storms or hurricanes. Each contract trades between 1 and 99 cents and settles to $1 or $0 on National Hurricane Center data. That makes it a financial instrument on the official record of the season, not a wager against a bookmaker; our guide to how weather markets work covers the basic mechanics.
How do hurricane contracts settle? On the National Hurricane Center's published determinations: naming, official landfall, and category. Forecasts never settle anything. The fine print matters, because the NHC's definitions are stricter than casual usage. Landfall requires the storm's center to cross the coastline, and a storm's peak category and landfall category are different numbers. Before trading any storm contract, open the rules on that market's page: they state which NHC publication governs settlement and the cutoff that applies, and two similar-sounding markets can point at different ones.
Why do several storm contracts resolve together? Because they are nested views of the same physical events. One major landfall can simultaneously settle a state landfall contract, the major-hurricane contract, and every category rung beneath the storm's official strength. The practical consequence is a sizing rule: treat every contract one storm can settle as a single position, because they will win or lose as one. Whether taking on risk shaped like that is investing or gambling is a fair question with a longer answer.
The through-line of this piece is one sentence: storm contracts are graded by one referee, the National Hurricane Center, and stacked on one another so tightly that a single storm can run down the whole board. That nested structure is what makes them unusual among event contracts, and it is why the worked example above, five settlements from one landfall, is the picture to keep. We trade Kalshi's daily temperature markets ourselves and publish the running log, losses included, on our Kalshi weather markets hub; the same house rule applies on any weather board, daily or seasonal: count the systems, not the tickers.
Disclosure and fine print. Stokastic trades Kalshi weather markets and holds positions in them; where a settled position is described in this series, we were the seller. Kalshi event contracts, including hurricane and named-storm contracts, are CFTC-regulated event derivatives traded on a designated contract market, not sportsbook wagers, and a position can lose its full value. Selling an unlikely outcome collects a small premium and risks most of a dollar, so one loss can erase the premiums from thirty or forty wins, and correlated storm contracts can resolve against you together; size accordingly. We have no affiliate or commercial relationship with Kalshi. 18+, available where Kalshi operates; the risk of loss is real and, on the side we trade, individually large. This series is an open research log of a strategy we have not proven. Nothing here is trading advice, and nothing on this page is a pick or a recommendation.
