Will Simon become a Category 4 hurricane? — Category 4 or above

- [2026-10-04] Simon originated as a tropical depression near 11.8°N, 91.5°W southeast of Tapachula, Chiapas, with winds near 28 km/h (17 mph) at formation. (https://www.rainviewer.com/storm-tracker/hurricanes/simon-2026.html) - [2026-10-07] Simon strengthened into a tropical storm at 18:00 UTC with winds of 65 km/h (40 mph), located 228 km southwest of Acapulco. (https://www.rainviewer.com/storm-tracker/hurricanes/simon-2026.html) - [2026-10-08, 3:00 PM CST] NHC Public Advisory #6 placed Simon near 15.7°N 103.9°W, about 230 mi south of Manzanillo, Mexico, with maximum sustained winds of 70 mph, moving west at 6 mph; Mexico issued a hurricane warning from Punta San Telmo to Playa Perula and a hurricane watch from Playa Perula to Punta Mita. At 3 p.m. CST on Thursday, Simon had maximum sustained winds of 70 miles per hour and was about 230 miles south of Manzanillo, Mexico. Mexico's government issued a hurricane warning from Punta San Telmo to Playa Perula, covering coastal portions of Michoacan, Colima and Jalisco. A hurricane watch extends west of Playa Perula to Punta Mita, covering parts of Jalisco and Nay (https://bnonews.com/index.php/2026/10/simon-forecast-to-strike-mexico-as-category-4-hurricane/) - [2026-10-08] NHC's official intensity forecast projected Simon's winds reaching 130 mph by early Saturday (Oct 10), which would make it a Category 4 hurricane before landfall. Tropical Storm Simon is forecast to rapidly strengthen into a Category 4 hurricane before reaching Mexico's Pacific coast, according to the U.S. National Hurricane Center. The NHC forecasts winds reaching 130 miles per hour by early Saturday, making Simon a Category 4 hurricane before it comes ashore. (https://bnonews.com/index.php/2026/10/simon-forecast-to-strike-mexico-as-category-4-hurricane/) - [2026-10-08] NHC/forecast models cited a compact inner core with an eye becoming apparent in satellite imagery, and a model put the chance of rapid intensification over the next 24 hours at over 70%. The storm has a compact inner core, with signs of an eye becoming apparent in satellite imagery. Low wind shear, abundant moisture and very warm water favor rapid strengthening. A forecast model cited by the NHC puts the chance of rapid intensification over the next 24 hours at more than 70 percent. (https://bnonews.com/index.php/2026/10/simon-forecast-to-strike-mexico-as-category-4-hurricane/) - [2026-10-09, 03:00 UTC] Weathernews summary of the latest NHC advisory (as of early Oct 9) still showed Simon as a tropical storm with winds of 85 km/h (50 mph) and central pressure 1002 mb, located about 270 km south of Lázaro Cárdenas. Based on the latest NHC Public Advisory analysis - Intensity: Tropical storm - Maximum sustained winds: 85 km/h (45 kt / 50 mph) (https://sea.weathernews.com/resources/202610/265) - [2026-10-09] The same analysis forecast Simon to become a hurricane by Thursday night and a major hurricane by late Friday/early Saturday, with peak winds forecast near 110 kt (125 mph) over the weekend before weakening as it nears northwestern Mexico early next week. Expect Simon to become a hurricane by Thursday night and a major hurricane by late Friday or early Saturday. Peak winds are forecast near 110 kt (125 mph) over the weekend, supported by very favorable environmental conditions. Weakening is expected as the storm nears northwestern Mexico early next week. (This is a mariner-oriented forecast, slightly lower than the NHC's cited 130 mph peak reported by BNO News the day before.) (https://sea.weathernews.com/resources/202610/265) - [2026-10-09, 03:00 UTC] Weather Underground's tracker showed Simon at 15.6°N 104.6°W with winds of 75 mph, still below the Category 4 threshold (130 mph). Last Updated: 10/9/2026 3:00:00 AM (Coordinated Universal Time) - Location: 15.6 N 104.6 W - Movement: WNW at 5 mph - Wind: 75 mph - Pressure: 985 mb (https://www.wunderground.com/hurricane/eastern-pacific/2026/tropical-storm-simon) - [2026-10-09] An aggregated forecast track (zoom.earth, citing model/advisory data) showed projected intensities escalating rapidly: Category 3 (125 mph) by Oct 10 06:00 UTC and Category 4 (130 mph) by Oct 10 18:00 UTC, before gradual weakening to Category 1 by Oct 12 and tropical storm strength by Oct 13. 10 Oct 18:00 H4 130 10 Oct 06:00 H3 125 9 Oct 18:00 H2 110 9 Oct 06:00 H1 85 (https://zoom.earth/storms/simon-2026/) - [2026-10-08] U.S. Embassy Mexico City issued a weather alert stating Simon was expected to strengthen into a hurricane by early Friday, Oct 9, and become a major hurricane Saturday, Oct 10, with a hurricane watch issued for coastal areas from Manzanillo to Punta Mita. Tropical Storm Simon is expected to strengthen into a hurricane by early Friday, October 9. It is predicted to become a major hurricane on Saturday, October 10. The U.S National Hurricane Center has issued a hurricane watch for all coastal areas from Manzanillo to Punta Mita. (https://mx.usembassy.gov/weather-alert-tropical-storm-simon-u-s-embassy-mexico-city-u-s-consulate-general-guadalajara-on-thursday-october-8-2026/) - [2026-10-08] Weather.com's season tracker noted the 2026 Eastern Pacific season has been much more active than average, with Simon expected to affect Mexico's west coast (including Puerto Vallarta) as a strong hurricane around Sunday–Monday (Oct 11–12). Simon is expected to affect Mexico's west coast as a strong hurricane on Sunday and Monday, including Puerto Vallarta. As you can see below, it has been a historically quiet Atlantic season, while the Pacific — especially the Eastern Pacific — has been much more active than usual. (https://weather.com/2026/10/08/storms/hurricane/hurricane-season-maps-tracker-tropical-storm-hurricane-isaias-rachel) - [2026-10-09] Season context: the 2026 Eastern Pacific season has already produced numerous major hurricanes, with three Category 5 storms this season (tying a seasonal record) and actual EPAC activity of 17 named storms, 7 hurricanes, and 5 major hurricanes so far. With three Category 5 Pacific hurricanes having formed this season, it is tied with the 1994, 2002, and 2018 seasons as the season with the most Category 5 hurricanes. Actual activity: EPAC 17 7 5 (https://en.wikipedia.org/wiki/2026_Pacific_hurricane_season) BOTTOM LINE: As of the morning of 2026-10-09, Simon remains a tropical storm (sustained winds ~75-85 km/h/50 mph per the newest advisories), but the NHC's official forecast track calls for rapid intensification to a major hurricane with peak winds right at or above the 130 mph Category 4 threshold by Saturday, October 10, before weakening as it approaches/moves inland over Mexico early next week — making the next 48-72 hours the decisive window for this contract. NOT FOUND: The very latest (post-03:00 UTC Oct 9) official NHC advisory text/number showing an updated intensity reading beyond 75-85 mph; confirmation of whether Simon has already reached Category 4 strength at time of writing.

- [2026-10-08] NHC's official Tropical Weather Discussion stated outright: "Rapid strengthening is forecast, and Simon is expected to become a hurricane later today and a very dangerous category 4 hurricane before it reaches the coast of Mexico." This is the base-case NHC intensity forecast feeding most model-derived trackers. (https://www.nhc.noaa.gov/mobile/text/refresh/MIATWDEP+html/081601_MIATWDEP.html) - [2026-10-09] Independent forecast aggregator zoom.earth shows a model consensus track with Simon reaching H4 (130 mph) by 10 Oct 18:00 UTC before weakening as it nears/crosses the coast, consistent with NHC's wording. Date Time Type Wind Pressure UTC mph mb ... 10 Oct 18:00 H4 130 10 Oct 06:00 H3 125 9 Oct 18:00 H2 110 (https://zoom.earth/storms/simon-2026/) - [2026-10-08] U.S. Embassy Mexico City alert echoed the same official guidance: "Tropical Storm Simon is expected to strengthen into a hurricane by early Friday, October 9... It is predicted to become a major hurricane on Saturday, October 10." (https://mx.usembassy.gov/weather-alert-tropical-storm-simon-u-s-embassy-mexico-city-u-s-consulate-general-guadalajara-on-thursday-october-8-2026/) - [2026-10-07] AP/NHC reported Simon's formation with winds of only 40 mph, underscoring how far it must climb to reach the 130-mph (Cat 4) threshold, though NHC already flagged potential rapid intensification into a major hurricane. "The storm's maximum sustained winds were around 40 mph (65 kph), and it was expected to strengthen into a hurricane by late Thursday and potentially into a major hurricane by Saturday, the hurricane center said." (https://www.usnews.com/news/us/articles/2026-10-07/tropical-storm-simon-forms-in-the-pacific-ocean-off-the-southwestern-coast-of-mexico) - [2026-10-09] Base-rate context: this Eastern/Central Pacific season has been extraordinarily conducive to major hurricanes under a historic El Niño. "Thanks to the very strong El Nino in the waters of the south-central Pacific Ocean, there have been three Category 5 hurricanes. This season currently ties 1994, 2002, and 2018 for the most Category 5 hurricanes." (https://cdapress.com/news/2026/oct/05/a-very-active-pacific-hurricane-season/) - [2026-10-05] Season totals through early October show majors (Cat 3+) are the norm rather than the exception this year: "there have now been 20 named storms in the central and eastern Pacific Ocean, including 10 hurricanes. Eight of those hurricanes were a Category 3 or higher, which is classified as a 'major.'" (https://cdapress.com/news/2026/oct/05/a-very-active-pacific-hurricane-season/) - [2026-09-23] Prior storm Hurricane Polo illustrates how extreme rapid intensification has repeatedly verified this season: "Polo met that criteria and then some, with a wind increase of 110 mph, going from a 50 mph tropical storm to a 160 mph Category 5 from Monday to Tuesday morning." Polo reached Category 4/5 status, showing this basin's 2026 intensification forecasts have been running accurate-to-conservative rather than overblown. (https://www.cnn.com/2026/09/22/weather/hurricane-polo-category-5-mexico-climate) - [2026-09-24] An expert quoted by AP/US News framed the driver: "It's ramping up to be perhaps the strongest El Nino on record," and "This week alone, Hurricane Polo drenched Mexico's Pacific coast as it seesaws between Category 4 and 5." This underlines that Cat 4+ eastern Pacific hurricanes have been a recurring, not rare, outcome in 2026. (https://www.usnews.com/news/news/articles/2026-09-24/its-been-an-intense-hurricane-season-in-the-pacific-and-theres-still-a-long-way-to-go) - [2026-05-21] Seasonal outlook (pre-season base rate) from NOAA had already flagged an unusually high likelihood of major hurricanes basin-wide: "The eastern Pacific outlook calls for a 70% probability of 15-22 named storms, with 9-14 expected to become hurricanes, including 5-9 major hurricanes." Actual-to-date major-hurricane counts (7, per Wikipedia's tracker) are already within/above that range, evidencing the outlook's reliability this year. (https://yaleclimateconnections.org/2026/05/el-nino-expected-to-help-spur-intense-hurricane-and-typhoon-seasons-in-the-north-pacific/) - [2026-10-09] Season tracker (Wikipedia, citing SMN/NOAA) confirms current actual tallies: "Actual activity: EPAC 17 7 5 161.1 ... Actual combined activity: 20 9 7 246.1" — meaning 7 of 9 hurricanes basin-wide so far reached "major" (Cat 3+) status, an unusually high major-hurricane conversion rate versus the 1991–2020 average ratio of 4.2 majors per 8.3 hurricanes. (https://en.wikipedia.org/wiki/2026_Pacific_hurricane_season) - [2026-10-09] Climatological average for comparison: a typical Eastern Pacific season averages 15.4 named storms, 8.3 hurricanes, and 4.2 major hurricanes, i.e., roughly half of hurricanes become major in an average year, versus the far higher ~75-80% conversion rate observed in 2026 so far. (https://en.wikipedia.org/wiki/2026_Pacific_hurricane_season) BOTTOM LINE: The reference class is favorable: this hyperactive, super-El-Niño-driven 2026 Eastern Pacific season has converted a much higher-than-normal share of hurricanes into majors (Cat 3+), with three Cat 5s already and NHC's own operational forecast explicitly calling for Simon to reach Category 4 before landfall, so base rates and official forecasts both point toward a high (though not certain, given forecast uncertainty and land interaction) chance of Simon reaching 130 mph. NOT FOUND: No specific historical statistic on how often NHC 3-5 day "expected to become category 4" forecasts verify exactly (a formal skill/verification rate for this exact phrasing); no Kalshi or other prediction-market price data (excluded per instructions); no post-landfall/weakening timeline specific to Simon beyond Oct 10–13 model projections already cited.

YES means: Simon's maximum sustained winds reach ≥130 mph (Category 4) at any point before the market's December 1, 2026 cutoff — most plausibly via NHC's own forecast rapid intensification peaking late Oct 9–10, 2026, before Simon nears the Mexican coast. - [2026-10-08, 9:00 PM CST] NHC's Hurricane Simon Forecast Discussion #7 confirmed Simon has become a hurricane this evening , and stated the official intensity forecast will continue to predict an RI event on Friday, with Simon becoming a category 4 hurricane while heading toward the coast of west-central Mexico... and now shows a peak intensity of 120 kt on Saturday morning — 120 kt equals 138 mph, meaningfully above the 130 mph Cat-4 threshold, giving headroom even if the forecast overshoots. (https://www.nhc.noaa.gov/text/refresh/MIATCDEP5+shtml/090321.shtml) - [2026-10-08, 6:00 PM CST] The official NHC forecast-advisory numeric track explicitly listed intensities of 36H 10/0600Z 17.7N 105.0W 115 KT 130 MPH; 48H 10/1800Z 18.8N 104.9W 115 KT 130 MPH , i.e., two consecutive forecast periods sitting exactly at the Cat-4 threshold before any weakening/landfall. (https://www.nhc.noaa.gov/mobile/text/refresh/MIATCDEP5+html/081437.shtml) - [2026-10-08, 3:00 AM CST] An earlier same-day advisory (#4) already had the forecast intensity climbing to a peak intensity of 120 kt on Saturday morning -equivalent levels, showing the upward revision was not a one-off spike but persisted/strengthened advisory-to-advisory through the day (45kt→60kt→75kt→95kt→110-115kt forecast progression). (https://www.nhc.noaa.gov/mobile/text/refresh/MIATCDEP5+html/080855.shtml) - [2026-10-08] NHC forecasters flagged a >70% SHIPS rapid-intensification probability and favorable structural signs (compact core, Dvorak estimate rising, forming eye), writing that Simon's conducive ocean heat content, dynamic, and thermodynamic environmental contributions indicate that Simon should quickly intensify during the next 24-36 hrs... SHIPS RI index shows a near 70 percent chance that the cyclone intensity will increase by 30 kt in 24 hrs . (https://www.nhc.noaa.gov/text/refresh/MIATCDEP5+shtml/090321.shtml) - [2026-10-08] AccuWeather's independent meteorology desk concurred with NHC guidance, reporting Simon is expected to strengthen into a Category 4 hurricane before making landfall along the southwestern coast of Mexico early Sunday morning , giving an extra day of margin (through Sunday) beyond NHC's Saturday morning peak estimate for the storm to reach 130 mph. (https://www.accuweather.com/en/hurricane/simon-to-become-category-4-hurricane-part-of-rare-triple-tropical-threat/1943688) - [2026-10-08] Puerto Vallarta-focused reporting corroborated that The NHC forecast rapid strengthening, with Simon becoming a hurricane Thursday night and reaching Category 4 intensity before approaching Mexico's coast on Saturday, October 10 , prompting Jalisco Civil Protection to call for preventive evacuations — official on-the-ground action consistent with high confidence in a Cat-4 outcome. (https://outandaboutpv.com/puerto-vallarta-prepares-for-simon-as-officials-urge-evacuations-in-at-risk-areas/) - [2026-10-09] Independent aggregator zoom.earth's model-consensus table showed the storm reaching H4/130 mph specifically at 10 Oct 18:00 H4 130 , matching the NHC's own numeric forecast and reinforcing that multiple independent guidance streams (not just NHC subjective wording) converge on an actual 130 mph crossing, not merely a "near-Cat-4" plateau. (https://zoom.earth/storms/simon-2026/) - [2026-10-08] Historical analog from the same basin this season: Hurricane Polo underwent extreme rapid intensification, going from a 50 mph tropical storm to a 160 mph Category 5 (per colleagues' report), demonstrating that this year's Eastern Pacific environment has repeatedly delivered on or exceeded NHC's aggressive RI forecasts rather than falling short, which supports taking the Simon forecast at face value rather than discounting it. - [2026-10-08, 3:00 PM CST] Mexico's government responded to the Cat-4 forecast with concrete action, issuing additional watches or warnings... required for portions of the coast of southwestern and west-central Mexico tonight or Friday , and a full hurricane warning (not just watch) along the most exposed stretch — official-agency behavior consistent with high confidence Simon will reach major/Cat-4 strength imminently. (https://nhc.noaa.gov/text/refresh/MIATCPEP5+shtml/072039.shtml?text=) BOTTOM LINE: NHC's own operational forecast — reiterated and slightly increased across consecutive advisories through the evening of Oct 8 — explicitly puts Simon's peak intensity at 120 kt (138 mph), comfortably above the 130 mph Cat-4 threshold, expected within roughly 36-48 hours of the Oct 9 writing (i.e., Saturday–Sunday, Oct 10-11), with independent models (zoom.earth) and AccuWeather corroborating a Cat-4 landfall; this season's unusually high RI-verification rate (e.g., Polo) further supports taking this forecast at face value rather than discounting it. NOT FOUND: The actual verified wind-speed reading from the most recent advisory after 9:00 PM CST Oct 8 (i.e., confirmation that Simon has already crossed 130 mph as of this writing); no official NHC advisory after Advisory #7/7-Corrected was found in the search results at time of research.

YES means: Simon's maximum sustained winds reach ≥130 mph (Category 4) at any point before the market closes on 2026-12-02, as reported by NHC advisories. - [2026-10-08, 3:00 PM CST] The NHC's official forecast-position table (Discussion #6) pegged Simon's peak intensity at exactly 115 KT / 130 MPH at both the 36-hour (10/0600Z) and 48-hour (10/1800Z) marks — the forecast peak sits precisely on the Category 4 threshold line, not comfortably above it, leaving no margin for the routine negative forecast error that frequently occurs in RI (rapid intensification) scenarios. - [2026-10-08, 9:00 PM CST] Only six hours later, Discussion #7 nudged the official peak to "a category 4 hurricane while heading toward the coast of west-central Mexico... now shows a peak intensity of 120 kt on Saturday morning" — even NHC's own in-house number moved by 5 kt between consecutive advisories, underscoring how volatile and unsettled the intensity call still is this close to the event window. - [2026-10-08] As late as Thursday morning's Advisory 3/4 cycle, NHC's peak forecast was still only "205 km/h (125 mph), a Category 3 storm... up from a 185 km/h (115 mph) peak in the previous advisory" — i.e., the Category 4 call only appeared in the most recent 1-2 advisories, a very short track record of consistency to rely on. - [2026-10-08] Mexico's own National Meteorological Service (SMN) scenario is notably weaker than NHC's, projecting landfall near Mazatlán as only a Category 1, since "That scenario has a Category 1 hurricane at landfall, with sustained winds of 150 km/h (93 mph)" and "The NHC forecasts a peak of 205 km/h (125 mph), a Category 3 major hurricane, on Saturday. It expects Simon to weaken to about 130 km/h (80 mph) by the time it is over Sinaloa" in that scenario — a credible competing national agency track that never reaches 130 mph at all. - [2026-10-08] AccuWeather's lead hurricane expert flagged a specific physical cap on intensification: "Simon's proximity to the coast of Mexico could limit its intensification if dry air from the mountains becomes drawn into the storm" , a mechanism that has repeatedly truncated peak intensity for storms approaching this same stretch of coastline. - [2011-10] Precedent: Hurricane Jova approached this identical coastline (Jalisco) on a similarly aggressive RI forecast but instead "a trough over the Baja California Peninsula generated southwesterly wind shear over the hurricane... causing Jova to weaken below major hurricane status" just before landfall, making landfall as "only" a Category 2 — illustrating that shear/trough interactions in this exact approach corridor have defeated Cat-4 forecasts before. - [2026-10-08] NHC's own forecast track shows the storm's Category 4 window, if it occurs at all, is extremely narrow and immediately followed by rapid decay: the same Discussion #6 table shows winds collapsing from 130 mph at 48H to just "65 KT 75 MPH...INLAND" by 60 hours — meaning even on NHC's own forecast, Simon would need to hit exactly the right 12-24 hour window to register ≥130 mph before land interaction ends the threat. - [2026-10-08] NHC explicitly cautioned about the forecast's inherent unreliability at this range: "The NHC notes that its day-five track errors average about 230 km (144 miles)" , and even intensity-only forecasts at 36-48 hours carry substantial error bars, especially during RI episodes where small deviations in convective structure or eyewall replacement cycles can cap peak winds 10-20 mph below forecast. - [2026-10-09, 03:00 UTC] As of the most recent confirmed advisory, Simon's actual winds were still only 75-85 km/h (50 mph per Weathernews) or 75 mph (per Weather Underground) — i.e., the storm has not yet even reached hurricane strength (74 mph) with full confidence, let alone approached the 130 mph Category 4 bar, meaning all Category 4 claims to date remain forecast, not observed. - [2008-10] Historical base rate from the same basin/season of year: Hurricane Norbert (2008) did reach Category 4 near Baja California, but many eastern Pacific storms forecast for RI near Mexico's coast in the October timeframe underperform their peak forecast once they begin interacting with the coastline's orography and trough-induced shear, a pattern repeated in Jova (2011) and partially in Enrique (2021), which "never made landfall" and stayed weak despite early intensification warnings. BOTTOM LINE: The official Category 4 call is extremely recent (less than 24 hours old as of the last data point), sits exactly on the 130 mph knife-edge rather than comfortably above it, conflicts with Mexico's own SMN forecast (which never reaches 130 mph), and must survive a narrow, imminent window before land interaction and historical shear/dry-air patterns (as seen with Jova in 2011) plausibly cap Simon below Category 4 before rapid weakening begins. NOT FOUND: No confirmed NHC advisory after 2026-10-09 03:00 UTC showing an observed (not forecast) wind speed; no official verification statistics on how often NHC's 24-36hr "will become Category 4" calls specifically fail in this basin/month.