Right now
The most recent data we hold from NOAA arrived 68 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 31 May 2026 at 19:30 UTC. It is kept here as a record.
No stronger detection stands among the 56 recorded within 20 km of this point since 15 March 2026 — 43 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 31 at 2:04PM CDT until May 31 at 2:30PM CDT by NWS St Louis MO
An estimated 18,181 people live within 50 km of this point.
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 90% |
| Coordinates | 37.6527, -90.7764 |
| Nearest City | Farmington (34 km) |
| Population Exposed | 18.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-31T19:04:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.ba415d066f72c32f062b351ae09732e0900b252d.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Iron, MO; Reynolds, MO; Washington, MO |
| Headline | Severe Thunderstorm Warning issued May 31 at 2:04PM CDT until May 31 at 2:30PM CDT by NWS St Louis MO |
| Expires | 2026-05-31T14:30:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.5 |
| Iem Unit | Inch |
| Iem City | Belgrade |
| Iem County | Washington |
| Iem State | MO |
| Iem Wfo | LSX |
| MergedSources | [{"id":"iem_H_37.970_-90.900_1780251780000","source":"iem","severity":"low","severityValue":25,"timestamp":1780251780000,"latitude":37.97,"longitude":-90.9},{"id":"iem_H_37.790_-90.850_1780253700000","source":"iem","severity":"low","severityValue":25,"timestamp":1780253700000,"latitude":37.79,"longitude":-90.85}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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