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Will there be more than 2 major Atlantic hurricanes in 2026? — Above 2

kalshiClimate and Weather·2026-09-24·view on kalshi ↗
3%
Agent
7%
Market Price
-3.6%
Edge
82%
Confidence
41,615
Volume
2.0c
Spread
68
Days to resolution
8
Markets in event
final rationale
Mean of 5 draws (0.03, 0.03, 0.03, 0.05, 0.04). (0) The condition is not met and is far from being met. The NHC's 2026 Tropical Weather Summary, updated through 24 September, shows 6 named storms, 0 hurricanes and 0 major hurricanes, with ACE 92% below normal. All three required Cat 3+ storms would still have to form before 1 December. (a) About 9–10 weeks remain in the resolution window, covering October and November, which climatologically hold perhaps 30–40% of seasonal activity. (b) If nothing changes, the count stays at 0 and the market resolves No. (c) No path: a strengthening super El Niño keeps producing the record wind shear seen in July–August. AL90 stays weak, as NHC expects, and at most one short-lived hurricane forms. This matches 2013, the closest late-start analog, which ended with zero majors. (d) Yes path: shear relaxes in October while Atlantic SSTs stay warm, as the WMO update notes, and three separate systems intensify to Cat 3+ in the Caribbean or subtropics. Fox Weather's review found no Gulf or Caribbean October formations in any Super El Niño year since 1960, and NOAA's own ceiling is 2 majors. The Kalshi anchor of 7% probably includes longshot premium, and its 7-day rise has no supporting meteorological news. Getting three majors from a standing start of zero in this regime looks like a 1–3% event, so I price below the market.
price vs. prediction
market price agent forecast at t+0
24 follow-ups
1. Planner Opus 5.5 · picks the research tools
Tools chosen: kalshi_direct resolution_source wikipedia kalshi_related polymarket_related
Planner reasoning
The Kalshi price is the anchor, and the NHC tropical cyclone reports and archive show how many major hurricanes have formed so far in 2026. The Wikipedia season article gives a structured running tally of storms and their peak categories. Related Kalshi and Polymarket hurricane-count markets offer cross-venue signals for what remains of the season.
2. Research parallel tool calls + 4 web research loops (Sonnet 5) · read raw by the forecasters
at a glance
RESEARCH DIGEST (built in code: tool summaries and each report's bottom line; the forecasters read the full tool outputs and reports) Tools - kalshi_direct: ## This Market's Kalshi Data **Above 2** (KXHURCTOTMAJ-26DEC01-T2) - Current price (probability): 7.00% - 7-day price change: +5.00% - 30-day price change: -12.00% - Average daily volume: 304 contracts - Price range: 2.00% - 63.00% - Data points: 88 days - resolution_source: already_resolved=no; matches_criteria=True; last_updated=September 24, 2026. As of the NHC's 2026 North Atlantic Tropical Weather Summary (updated through 21 UTC 24 September 2026), there have been 6 named storms, 0 hurricanes, and 0 major hurricanes (vs. 1991-2020 normal of 2 major hurricanes), with total ACE of 7.0 (x10^4 kt^2), 92% below normal. - wikipedia: Fetched 1 Wikipedia entries (0 missing pages). - kalshi_related: 0 related markets / summaries. series KXHURCTOTMAJ: | series KXHURCTOT: 0 markets (skipped 9 no-signal) | keyword 'Atlantic hurricane': no matches - polymarket_related: Polymarket search over 2 keyword(s), kept 5 matches. keyword 'major hurricane': 0 markets | keyword 'Atlantic hurricane 2026': 5 markets Research loops, bottom lines - current state: As of September 24, 2026, the Atlantic has had zero hurricanes and zero major hurricanes all season (six named storms only), the latest start to hurricane activity on record, with forecasters (NOAA, CSU) repeatedly downgrading major-hurricane expectations to 0–2 amid a strengthening El Niño; only ~9 weeks remain before the December 2 close, with no active hurricane and only marginal disturbances currently being monitored. - base rate: Under the long-run base rate (~14 named storms/7 hurricanes/3 majors per season, 1991–2020 average), "more than 2 majors" is the historically typical outcome, but 2026 is tracking as one of the most anomalously quiet, latest-starting seasons on record (comparable to 2013, a zero-major-hurricane year), with zero hurricanes and zero majors through late September and every seasonal forecast agency revising activity downward — so the outside view now argues against exceeding 2 majors this year, thou - yes case: The YES case rests on the facts that (1) NOAA's own forecast band already includes 2 majors as a plausible outcome, so exceeding it needs only one additional major storm; (2) the peak Atlantic development window (mid-September–October) is still active, with a live 70%-chance disturbance near Cabo Verde as of Sept 24; and (3) warm background Atlantic SSTs persist even under El Niño, historically enough to spawn isolated but intense majors (e.g., 2002's Lili) in otherwise suppressed seasons. - no case: Every independent line of evidence — the live Kalshi order book (7% Yes on "Above 2"), NOAA's own 0–2 major ceiling, record-strong Atlantic wind shear tied to a probable Super El Niño, and the closest historical analog (2013, which went from a similar hot pre-season bust straight to zero majors) — points the same direction: starting from zero majors with El Niño intensifying into peak season, clearing "more than 2" by December 2 would require an unprecedented late-season reversal with no current
tools
toolstatustimeitemssummary
kalshi_direct OK 0.4s 1 ## This Market's Kalshi Data **Above 2** (KXHURCTOTMAJ-26DEC01-T2) - Current price (probability): 7.00% - 7-day price change: +5.00% - 30-day price change: -12.00% - Average daily volume: 304 contracts - Price range: 2.00% - 63.00% - Data points: 88 days
resolution_source OK 6.0s 1 already_resolved=no; matches_criteria=True; last_updated=September 24, 2026. As of the NHC's 2026 North Atlantic Tropical Weather Summary (updated through 21 UTC 24 September 2026), there have been 6 named storms, 0 hurricanes, and 0 major hurricanes (vs. 1991-2020 normal of 2 major hurricanes), wit
wikipedia OK 0.4s 1 Fetched 1 Wikipedia entries (0 missing pages).
kalshi_related OK 8.3s 0 0 related markets / summaries. series KXHURCTOTMAJ: | series KXHURCTOT: 0 markets (skipped 9 no-signal) | keyword 'Atlantic hurricane': no matches
polymarket_related OK 0.5s 5 Polymarket search over 2 keyword(s), kept 5 matches. keyword 'major hurricane': 0 markets | keyword 'Atlantic hurricane 2026': 5 markets
research loops · 4/4 ok · 14 searches · 6 page reads
dimensionstatustimesearchespage readsreport
current state OK 36s 4 2 4799 chars
base rate OK 29s 3 1 4496 chars
yes case OK 48s 3 1 4858 chars
no case OK 116s 4 2 5302 chars
report: current state
- [2026-09-24] As of today, the 2026 Atlantic hurricane season has produced zero hurricanes (and therefore zero major hurricanes) despite six named storms (Arthur, Bertha, Cristobal, Dolly, Edouard, Fay); the NHC infobox shows Hurricanes: 0, Major hurricanes (Cat. 3+): 0, with an ACE of 4.4 . https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season - [2026-09-11] The season set a satellite-era record for latest first hurricane, as on September 11, the 2026 season surpassed the latest date for the first Atlantic hurricane of a season in the satellite era , with no hurricane having formed by that date. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season - [2026-09-24] NHC's real-time site confirms NHC issuing advisories for the Atlantic on TS Fay as the only active Atlantic system, still below hurricane strength. https://www.nhc.noaa.gov/ - [2026-09-24] NHC's 2:00 PM EDT outlook shows a separate disturbance, AL90, located a few hundred miles south-southeast of the Cabo Verde Islands... producing a large area of disorganized showers and thunderstorms. This system could become a short-lived tropical depression or tropical storm later today or on Friday , but is not expected to strengthen much. https://www.nhc.noaa.gov/gtwo.php - [2026-09-22] Fay itself weakened before restrengthening: the NHC's final advisory on Fay described it as located about 685 miles southwest of the Azores moving west-southwest at 9 mph with maximum sustained winds of 35 mph , well below hurricane force, before it briefly regenerated. https://www.spokesman.com/stories/2026/sep/22/nhc-ups-chances-for-tropical-wave-as-fay-devolves-/ - [2026-08-06] NOAA's latest official seasonal update cut its forecast, predicting between seven and 13 named storms this year. Of those, two to six would become hurricanes... there might not be any major hurricanes this year, or at most two . https://www.spokesman.com/stories/2026/sep/22/nhc-ups-chances-for-tropical-wave-as-fay-devolves-/ - [2026-08-06] NOAA's press release confirms the reduced outlook: NOAA forecasters predict a 75% chance for below-normal activity, with a 20% chance of a near-normal season, and just a 5% chance of above-normal activity... a typical hurricane season will yield 14 named storms, of which seven become hurricanes, including three major hurricanes . https://www.noaa.gov/news-release/noaa-maintains-prediction-for-below-normal-atlantic-hurricane-season - [2026-07-08] Colorado State University further slashed its forecast mid-season, now projecting only nine storms, four of which will become hurricanes and only one of which will reach Category 3 status or stronger... five fewer storms and three fewer hurricanes than an average season . https://weather.com/2026/07/08/storms/hurricane/2026-atlantic-hurricane-season-outlook-csu-july-el-nino - [2026-09-24] Meteorologists attribute the historically inactive season to a strengthening El Niño; per Fox Weather, this year is tracking to be a quiet season due to hostile conditions produced by the inhibitive El Niño climate pattern taking hold across the Pacific and thwarting activity in the Atlantic basin . https://www.foxweather.com/weather-news/atlantic-hurricane-season-late-first-hurricane-super-el-nino-2026 - [2026-09-24] A tropical wave off Africa (potential "Gonzalo") has increasing development odds, with one report noting a broad area of low pressure...was located a few hundred miles south-southeast of the Cabo Verde Islands...increasing upper-level winds are expected to limit further development by the weekend , suggesting limited intensification potential even if it forms. https://www.caribpulse.com/2026/09/24/tropical-disturbance-now-has-70-chance-of-developing-in-atlantic?postId=99965 - [2026-09-02] Historical context noted by Fox Weather: even late-starting seasons can still generate majors, citing 2001 (nine hurricanes, four major) and 1967 (one major), so a compressed active window in October–November remains climatologically possible. https://www.foxweather.com/weather-news/atlantic-hurricane-season-late-first-hurricane-super-el-nino-2026 BOTTOM LINE: As of September 24, 2026, the Atlantic has had zero hurricanes and zero major hurricanes all season (six named storms only), the latest start to hurricane activity on record, with forecasters (NOAA, CSU) repeatedly downgrading major-hurricane expectations to 0–2 amid a strengthening El Niño; only ~9 weeks remain before the December 2 close, with no active hurricane and only marginal disturbances currently being monitored. NOT FOUND: No confirmed formation of any hurricane (Category 1 or higher) in the Atlantic as of the report date; exact current status/naming of the Cabo Verde disturbance ("Gonzalo") as of late Sept 24 was not confirmed via NHC advisory text.
report: base rate
- [2025-04-09] The NOAA National Hurricane Center's official 1991–2020 climatology puts the Atlantic seasonal average at "14 named storms, 7 hurricanes, and 3 major hurricanes (Category 3, 4, or 5 on the Saffir-Simpson Hurricane Wind Scale)," so an "above 2 majors" outcome is the modal/average historical result. https://www.nhc.noaa.gov/climo/ - [2023-03-03] Longer-run climatology (1950–2018) shows "an average of 2.7 major hurricanes have formed per year in the Atlantic basin," with several years, most recently 2013 and 1994, having zero major hurricanes , indicating roughly 1-in-5 to 1-in-4 seasons historically fail to exceed 2 majors, though most seasons do exceed that threshold. https://manhattan.institute/article/a-history-of-hurricane-season - [2026-08-06] NOAA's own outlook, last updated for 2026, has been revised down over the season: a 35% chance of a near-normal season, a 10% chance of an above-normal season, and a 55% chance of a below-normal season, with 8–14 named storms and 3–6 hurricanes, including 1–3 major hurricanes , and by August the range for majors was cut to 0-2 (per Wikipedia's summary of the August 6 update), pushing the central/likely outcome toward "2 or fewer." https://www.noaa.gov/news-release/noaa-predicts-below-normal-2026-atlantic-hurricane-season - [2026-09-2x] As of the most recent Wikipedia season tracker, the 2026 Atlantic season has recorded six named storms total, zero hurricanes, and zero major hurricanes (Cat. 3+), with ACE of 5.1 , meaning the count currently stands at 0 out of a threshold of >2. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season - [2026-09-11] The season is historically anomalous: on September 11, the 2026 season surpassed the latest date for the first Atlantic hurricane of a season in the satellite era, and as of September 2026 the season has been extremely inactive , tying/breaking the previous record lateness set in 2002 and 2013 — both of which ended up well below average in major-hurricane counts. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season - [2026-09-2x] Forecast agencies have progressively cut their outlooks through the season: TSR/CSU/UA all began with near- or above-average major-hurricane predictions (3-4) in December 2025–April 2026, but by early July CSU had reduced its call to just "one major hurricane," and NOAA's August update further lowered the major-hurricane range to 0-2, reflecting a strengthening El Niño suppressing activity. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season - [2026-09-2x] Comparable historical "late start" seasons (2002, 2013) are instructive: 2013 famously had zero major hurricanes for the entire season, illustrating that when El Niño-driven shear delays the first hurricane this late, the season has previously ended up in the "2 or fewer" category. https://manhattan.institute/article/a-history-of-hurricane-season - [2026-09-20/21] Recent named storm Fay only briefly approached Category 1 strength and dissipated; Fay had a small window of opportunity to strengthen to a low-end category 1 hurricane before quickly losing strength and becoming a remnant low , so it did not even become a hurricane, let alone major — underscoring the sharp shear/dry-air environment. https://www.clickorlando.com/weather/2026/09/20/tropical-storm-fay-could-become-the-first-hurricane-of-the-2026-atlantic-hurricane-season/ - [2026-09-2x] No credible forecaster currently expects the season to reach 3+ majors; the trend across every update (TSR, CSU, UA, UKMO, NOAA) since April 2026 has been downward revision, not upward, driven by an unusually strong El Niño. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season BOTTOM LINE: Under the long-run base rate (~14 named storms/7 hurricanes/3 majors per season, 1991–2020 average), "more than 2 majors" is the historically typical outcome, but 2026 is tracking as one of the most anomalously quiet, latest-starting seasons on record (comparable to 2013, a zero-major-hurricane year), with zero hurricanes and zero majors through late September and every seasonal forecast agency revising activity downward — so the outside view now argues against exceeding 2 majors this year, though ~2 months of peak-adjacent season remain. NOT FOUND: No official NHC post-season "final" major hurricane tally for 2026 exists yet (season is ongoing); no explicit market-implied probability or published betting odds for this specific Kalshi contract were found in search results.
report: yes case
**Most likely path to YES:** Despite the record-quiet start, the 2026 season still has ~9 weeks left overlapping the historically most favorable window for major-hurricane formation, and both the atmospheric suppression (El Niño shear) and oceanic fuel (warm Atlantic SSTs) are not uniformly hostile — meaning a shift to just 3 majors (one more than the top of NOAA/CSU's own official range) is a comparatively modest deviation, not a return to an "average" season. - [2026-08-06] NOAA's own official outlook explicitly notes the August update was issued "ahead of the historical peak of the season, which typically extends from mid-September through October," meaning the most climatologically active weeks for major-hurricane formation are still underway or imminent even as the market's resolution deadline (Dec 1) approaches. https://www.noaa.gov/news-release/noaa-predicts-below-normal-2026-atlantic-hurricane-season - [2026-09-14] A WMO seasonal update for September–November 2026 states that even as El Niño intensifies toward a ~3.6°C Niño 3.4 anomaly peaking in Nov–Dec, "the equatorial Atlantic basin is forecast to remain generally warm, with SSTs in both the North and South Tropical Atlantic staying above normal" — i.e., oceanic heat fuel for rapid intensification is not being cut off even as atmospheric shear rises. https://wmo.int/resources/publication-series/global-seasonal-climate-updates/gscu-son2026 - [2026-08-04] CSU's own August forecast, while predicting "well below-average probability for major hurricane landfalls along the continental United States coastline and in the Caribbean," is a landfall-probability statement, not a basin-wide formation ceiling; the same report reminds readers "it only takes one hurricane making landfall to make it an active season," underscoring that the NHC's basin-wide major count (the market's actual trigger) is a lower, easier bar to clear than U.S.-landfall risk. https://tropical.colostate.edu/Forecast/2026-08.pdf - [2026-09-24] NOAA's 8:00 AM EDT Atlantic outlook shows an active, developing system (AL90) near the Cabo Verde Islands with a "70 percent" formation chance through both 48 hours and 7 days, confirming the Main Development Region wave train has not shut down entirely and new invests can still emerge on short notice. https://www.nhc.noaa.gov/gtwo.php - [2026-08-06] NOAA's official numeric range for majors this season is explicitly "0 to 2," per Fox Weather's report of the outlook, meaning the market's ">2" threshold requires the season to land just one storm above the top of NOAA's own central forecast — not an extreme outlier relative to the agency's stated uncertainty band. https://www.foxweather.com/weather-news/noaa-2026-hurricane-season-forecast-august-super-el-nino - [2002 season] The 2002 Atlantic season, driven by "a strengthening El Niño" that suppressed hurricane counts to just four, still produced Hurricane Lili, which intensified to major-hurricane strength in early October — the same historical playbook (late-season Caribbean/Gulf intensification) remains available in 2026's remaining weeks. https://www.nhc.noaa.gov/news/NOAA_pr_11-25-02.html - [2026-09-24] AccuWeather's seasonal lead forecaster noted that "in recent years, during a Super El Niño, powerful destructive hurricanes still developed in the Atlantic Ocean," citing prior Super El Niño years as producing notable major hurricanes despite the suppressive pattern, i.e., El Niño strength alone has not historically guaranteed a sub-3-major outcome. https://www.foxweather.com/learn/most-notable-atlantic-hurricanes-during-el-nino-years - [2026-09-11] CNN quoted a CSU hurricane expert conceding only that this is "the least active one since 1950" through the statistical peak date — a superlative about activity-to-date, not a guarantee about the remaining Oct–Nov window, which climatologically still hosts a meaningful share of Atlantic major-hurricane formations even in suppressed years. https://edition.cnn.com/2026/09/12/weather/el-nino-hurricane-storm-atlantic-record-climate BOTTOM LINE: The YES case rests on the facts that (1) NOAA's own forecast band already includes 2 majors as a plausible outcome, so exceeding it needs only one additional major storm; (2) the peak Atlantic development window (mid-September–October) is still active, with a live 70%-chance disturbance near Cabo Verde as of Sept 24; and (3) warm background Atlantic SSTs persist even under El Niño, historically enough to spawn isolated but intense majors (e.g., 2002's Lili) in otherwise suppressed seasons. NOT FOUND: No forecaster or model has issued a specific probability that 2026 will exceed 2 majors; no confirmed named/numbered storm beyond AL90 has developed since this report's search cutoff, and no official NHC intensity forecast for AL90 reaching major-hurricane strength was located.
report: no case
- [2026-09-24] The exact Kalshi market this question tracks currently prices "Above 2" major hurricanes at only 7% implied probability (Yes 6¢/No 96¢), while "Above 0" sits at 32% and "Above 1" at 17% — market pricing already treats a NO resolution as the heavy favorite. https://kalshi.com/markets/kxhurctotmaj/number-of-major-hurricanes/kxhurctotmaj-26dec01 - [2026-09-05] An independent tracker of this same Kalshi contract reported the market-implied expectation at "2.4 major hurricanes forecast for the Atlantic in 2026," consistent with the current low-probability pricing for exceeding 2. https://www.covers.com/entertainment/disaster-prediction-markets - [2026-09-21] Fox Weather's analysis found that during Super El Niño years since 1960, "no tropical systems formed in the Gulf or Caribbean in October," directly undercutting the Central American Gyre as a fallback source of October activity this year. https://www.foxweather.com/weather-news/historically-quiet-atlantic-hurricane-season-super-el-nino - [2026-09-21] The same report notes about 40% of a typical season's hurricane activity statistically remains after mid-September, but frames this against a season already 112 years behind the historical pace for first hurricane formation. https://www.foxweather.com/weather-news/historically-quiet-atlantic-hurricane-season-super-el-nino - [2013 season, historical analog] NHC's own annual summary for the closest analog year states plainly that in 2013 "only 2 of these storms became hurricanes" and "For the first time since 1994, no hurricane reached major hurricane strength," despite warm SSTs — showing a similarly-late, shear-dominated season can end with zero majors even when other factors look favorable. https://www.nhc.noaa.gov/data/tcr/summary_atlc_2013.pdf - [2013-11-29] Analysis of 2013 additionally shows preseason forecasts of "at least 7 hurricanes, 3 major hurricanes" were "a major bust," ending at "2 hurricanes, 0 major hurricanes" — a mechanism (persistent shear overwhelming warm SSTs) directly analogous to 2026's setup. https://www.wunderground.com/blog/JeffMasters/the-unusually-quiet-atlantic-hurricane-season-of-2013-ends.html - [2026-08-21] Moody's/RMS notes NOAA assigns a 90% probability to strong-or-very-strong El Niño (RONI ≥1.5°C) for August–October 2026, with a 48% chance of a "very strong" event (RONI ≥2°C) — a quantified, elevated-confidence suppression signal beyond generic "El Niño present" framing. https://www.moodys.com/web/en/us/insights/insurance/2026-north-atlantic-hurricane-season-update-strong-el-nino-expected-to-suppress-peak-season-activity.html - [2026-07-08] Weather.com's CSU coverage shows CFS model wind-shear anomaly maps for August–October 2026 depicting the Main Development Region under widespread above-average shear, the specific mechanism preventing intensification even if storms form. https://weather.com/2026/07/08/storms/hurricane/2026-atlantic-hurricane-season-outlook-csu-july-el-nino - [~2026-09] A severe-weather.eu analysis reports Atlantic wind shear in July–August 2026 "ranking 2026 wind shear the highest on record for the period in the last 47 years," quantifying the suppression more starkly than seasonal-average shear discussions. https://www.severe-weather.eu/global-weather/super-el-nino-builds-atmospheric-hurricane-shield-winter-2026-2027-connections-united-states-canada-fa/ - [2026-09-1x] CBS News reporting confirms NOAA's most recent official range remains "zero to two major hurricanes," meaning even NOAA's own upper bound sits exactly at the market's "Above 2" threshold, not above it. https://www.cbsnews.com/news/atlantic-hurricane-season-activity-record-low-el-nino/ - [2026-09-1x] The same reporting states the five-storm season so far has been driven "almost 100% El Niño" per CSU's Klotzbach, reinforcing that a single, still-strengthening causal driver (not multiple independent factors) explains the inertia, and that driver is forecast to strengthen further into Q4. https://www.inquirer.com/weather/atlantic-hurricane-season-el-nino-noaa-20260910.html - [2026 season, ongoing] Wikipedia's tracker (cross-checked) confirms the season total remains six named storms with zero hurricanes and zero major hurricanes as of the most recent update, meaning literally the entire >2 threshold must be cleared from a standing start of zero in the roughly nine weeks remaining before the December 2 close. https://en.wikipedia.org/wiki/2026_Atlantic_hurricane_season BOTTOM LINE: Every independent line of evidence — the live Kalshi order book (7% Yes on "Above 2"), NOAA's own 0–2 major ceiling, record-strong Atlantic wind shear tied to a probable Super El Niño, and the closest historical analog (2013, which went from a similar hot pre-season bust straight to zero majors) — points the same direction: starting from zero majors with El Niño intensifying into peak season, clearing "more than 2" by December 2 would require an unprecedented late-season reversal with no current precedent in Super El Niño years. NOT FOUND: No official Kalshi settlement source or documented past instance of a Super El Niño year producing 3+ Atlantic majors was found; no post-September 24 NHC advisory yet confirms whether the Cabo Verde disturbance ("Gonzalo" candidate) organized into a named system.
3. Forecasters 5 draws · Opus 5.5 + GPT-5.6 Sol · plain mean
claude-opus-5-5
80% conf
Yes 2%
No 98%
(0) The condition is not met and is far from being met. The NHC's 2026 Tropical Weather Summary, updated through 24 September, shows 6 named storms, 0 hurricanes and 0 major hurricanes, with ACE 92% below normal. All three required Cat 3+ storms would still have to form before 1 December. (a) About 9–10 weeks remain in the resolution window, covering October and November, which climatologically hold perhaps 30–40% of seasonal activity. (b) If nothing changes, the count stays at 0 and the market resolves No. (c) No path: a strengthening super El Niño keeps producing the record wind shear seen in July–August. AL90 stays weak, as NHC expects, and at most one short-lived hurricane forms. This matches 2013, the closest late-start analog, which ended with zero majors. (d) Yes path: shear relaxes in October while Atlantic SSTs stay warm, as the WMO update notes, and three separate systems intensify to Cat 3+ in the Caribbean or subtropics. Fox Weather's review found no Gulf or Caribbean October formations in any Super El Niño year since 1960, and NOAA's own ceiling is 2 majors. The Kalshi anchor of 7% probably includes longshot premium, and its 7-day rise has no supporting meteorological news. Getting three majors from a standing start of zero in this regime looks like a 1–3% event, so I price below the market.
claude-opus-5-5
85% conf
Yes 2%
No 98%
(0) Resolution check: the NHC's 2026 tropical weather summary, updated through September 24, shows 6 named storms, 0 hurricanes and 0 major hurricanes, with ACE 92% below normal. The Yes condition is not met, and three separate Category 3+ hurricanes would still have to form before December 1. (a) About 9–10 weeks remain, and they cover the back half of the season, when activity climatologically fades. (b) Status quo: the count stays well under 3 and the market resolves No. (c) No scenario: record-strength shear from a strengthening super El Niño keeps suppressing the basin. Fox Weather's analysis found no October Gulf or Caribbean formations in super El Niño years since 1960. The season ends like 2013 with 0–1 majors; even NOAA's August range tops out at 2. (d) Yes scenario: warm Atlantic SSTs allow a burst of three rapidly intensifying storms in October–November, something like 2002's Lili tripled. There is no precedent for this in a season that has yet to produce a single hurricane by late September, let alone under a very strong El Niño. The Kalshi price of 7% looks inflated by the thin book and the upward skew typical of low-priced contracts rather than by any real information. The live disturbance AL90 is forecast to be short-lived and limited by upper-level winds. I shade below the market to about 2%, keeping some tail room for an extreme late-season reversal.
claude-opus-5-5
80% conf
Yes 3%
No 97%
(0) Not met: the NHC summary through Sept 24 shows 6 named storms, 0 hurricanes and 0 majors, with ACE 92% below normal. (a) About 9-10 weeks remain to Dec 1, and three separate Cat 3+ hurricanes must form from zero. (b) Status quo is 0 majors, which resolves No. (c) No: a very strong El Niño with record Atlantic shear keeps suppressing development; AL90 fizzles as the NHC expects, and the season ends like 2013 with 0-1 majors. (d) Yes: warm Atlantic SSTs fuel an unprecedented October-November burst of three rapid intensifiers, as in 2020 or 2024, but that runs against the fact that super El Niño years since 1960 had no October Gulf/Caribbean formations. Kalshi prices Yes at 7% (Above 1 at 17%); given zero hurricanes to date and NOAA's 0-2 majors ceiling, I shade below the market to about 3%.
gpt-5.6-sol
84% conf
Yes 5%
No 95%
(0) The condition is not already met or impossible: NHC’s September 24 summary records zero major hurricanes, so at least three must reach Category 3 strength by December 1. (a) About 68 days remain until the resolution window ends, although most Atlantic activity historically occurs before December. (b) If the current count does not change, the market resolves No. (c) The straightforward No scenario is that persistent record-high wind shear associated with the strengthening El Niño continues to prevent intensification, leaving the season at zero to two majors, consistent with NOAA’s August forecast range and the 2013 analog. (d) Yes requires an abrupt late-season reversal producing at least three major hurricanes, potentially aided by warm Atlantic waters during the remaining September–October window, but no current system is forecast to become a major hurricane. I anchor on Kalshi’s 7% Yes price and reduce it modestly to 5% because the NHC-confirmed standing count is still zero, NOAA’s official upper forecast bound is two, and the independent Polymarket hurricane-count markets assign only 4.45% total probability to four or more hurricanes of any intensity.
gpt-5.6-sol
80% conf
Yes 4%
No 96%
(0) The condition is neither met nor impossible: NHC’s September 24 summary records zero major hurricanes, so at least three must reach Category 3 or higher by December 1. (a) Roughly 68 days remain, although the great majority of Atlantic activity historically occurs before the end of November. (b) If the current count does not change, the market resolves No. (c) The central No scenario is that persistent record-high wind shear from the strengthening El Niño continues suppressing intensification, leaving the season within NOAA’s updated range of zero to two major hurricanes. (d) A Yes scenario requires a sharp October reversal in which warm Atlantic waters support at least three rapidly intensifying storms despite the hostile shear, potentially beginning with the active Cabo Verde wave train. I move modestly below Kalshi’s 7% Yes anchor to 4% because zero hurricanes—not merely zero majors—have formed through September 24, NOAA’s forecast ceiling is two majors, and the independent Polymarket hurricane-count markets assign only 4% to even four to six total hurricanes, though late-season weather uncertainty prevents a near-zero price.
4. Final plain mean of 5 draws
3% (82% confidence)
Yes: 3% No: 97%
Mean of 5 draws (0.03, 0.03, 0.03, 0.05, 0.04). (0) The condition is not met and is far from being met. The NHC's 2026 Tropical Weather Summary, updated through 24 September, shows 6 named storms, 0 hurricanes and 0 major hurricanes, with ACE 92% below normal. All three required Cat 3+ storms would still have to form before 1 December. (a) About 9–10 weeks remain in the resolution window, covering October and November, which climatologically hold perhaps 30–40% of seasonal activity. (b) If nothing changes, the count stays at 0 and the market resolves No. (c) No path: a strengthening super El Niño keeps producing the record wind shear seen in July–August. AL90 stays weak, as NHC expects, and at most one short-lived hurricane forms. This matches 2013, the closest late-start analog, which ended with zero majors. (d) Yes path: shear relaxes in October while Atlantic SSTs stay warm, as the WMO update notes, and three separate systems intensify to Cat 3+ in the Caribbean or subtropics. Fox Weather's review found no Gulf or Caribbean October formations in any Super El Niño year since 1960, and NOAA's own ceiling is 2 majors. The Kalshi anchor of 7% probably includes longshot premium, and its 7-day rise has no supporting meteorological news. Getting three majors from a standing start of zero in this regime looks like a 1–3% event, so I price below the market.
Pipeline Timing
Total pipeline time: 169.4s
Per-tool research timings shown in the Research section above.