Strengthening El Niño conditions, now confirmed by NOAA with Niño-3.4 indices rising and expected to intensify through 2026, represent the dominant driver suppressing U.S. tornado activity. El Niño phases historically correlate with fewer favorable atmospheric setups, including reduced Gulf moisture transport and altered jet stream patterns that limit supercell formation. Recent quiet severe weather periods through May and June 2026 reinforce this trend, aligning with below-average July outcomes that traders favor at 48.5% for under 100 tornadoes. Historical July averages near 119 provide context, though interannual variability remains high due to shorter-term steering patterns and local instability. No major model shifts have yet altered this consensus ahead of July monitoring updates.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHow many Tornadoes in the US in July?
<100 49%
100–129 30%
220–249 26%
130–159 25%
<100
49%
100–129
30%
130–159
25%
160–189
25%
190–219
25%
220–249
26%
250–279
22%
280–310
24%
310+
24%
<100 49%
100–129 30%
220–249 26%
130–159 25%
<100
49%
100–129
30%
130–159
25%
160–189
25%
190–219
25%
220–249
26%
250–279
22%
280–310
24%
310+
24%
Only tornadoes appearing in the final NCEI dataset for that month will count.
As of market creation, the relevant report is scheduled to be released on August 10, 2026, at 5:01 PM GMT+1 or 11:00 AM ET (Release schedule: https://www.ncei.noaa.gov/access/monitoring/dyk/monthly-releases). The market will resolve based on the first relevant tornado count published on the NCEI tornado time-series page after this scheduled release time.
If the value published after this scheduled release time is labeled preliminary, it will still determine resolution, and the market will resolve independently of any subsequent revisions, corrections, or retroactive adjustments.
The market will not resolve based on any preliminary values published before the scheduled release time.
If no data is published by the scheduled release time, or if the NCEI website is temporarily unavailable, this market will remain open until that data is made available. If the relevant data is not made available by the date of the next scheduled publication ET, this market will resolve based on available data for the most recent prior month. If the NCEI website becomes permanently unavailable, this market will resolve using another credible source.
Market Opened: Jun 9, 2026, 1:12 PM ET
Resolver
0x69c47De9D...Only tornadoes appearing in the final NCEI dataset for that month will count.
As of market creation, the relevant report is scheduled to be released on August 10, 2026, at 5:01 PM GMT+1 or 11:00 AM ET (Release schedule: https://www.ncei.noaa.gov/access/monitoring/dyk/monthly-releases). The market will resolve based on the first relevant tornado count published on the NCEI tornado time-series page after this scheduled release time.
If the value published after this scheduled release time is labeled preliminary, it will still determine resolution, and the market will resolve independently of any subsequent revisions, corrections, or retroactive adjustments.
The market will not resolve based on any preliminary values published before the scheduled release time.
If no data is published by the scheduled release time, or if the NCEI website is temporarily unavailable, this market will remain open until that data is made available. If the relevant data is not made available by the date of the next scheduled publication ET, this market will resolve based on available data for the most recent prior month. If the NCEI website becomes permanently unavailable, this market will resolve using another credible source.
Resolver
0x69c47De9D...Strengthening El Niño conditions, now confirmed by NOAA with Niño-3.4 indices rising and expected to intensify through 2026, represent the dominant driver suppressing U.S. tornado activity. El Niño phases historically correlate with fewer favorable atmospheric setups, including reduced Gulf moisture transport and altered jet stream patterns that limit supercell formation. Recent quiet severe weather periods through May and June 2026 reinforce this trend, aligning with below-average July outcomes that traders favor at 48.5% for under 100 tornadoes. Historical July averages near 119 provide context, though interannual variability remains high due to shorter-term steering patterns and local instability. No major model shifts have yet altered this consensus ahead of July monitoring updates.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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