This alert expired on 15 March 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 23 recorded within 20 km of this point since 15 March 2026 — 8 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 March 15 at 3:48PM CDT until March 15 at 4:30PM CDT by NWS St Louis MO
An estimated 20,019 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 1, 2026 · score 28 · 6.8 km
- May 31, 2026 · score 34 · 8.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 83 % 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 | 83% |
| Coordinates | 38.0236, -91.3188 |
| Nearest City | Rolla (40 km) |
| Population Exposed | 20.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T20:48:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe-Thunderstorm-Warning_noaa_urn-oid-2_49_0_1_840_0_7329e4e7a11dc49350dd12ae96d0d962 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Crawford, MO; Franklin, MO; Gasconade, MO; Washington, MO; Calhoun, IL; Lincoln, MO; St. Charles, MO; Calhoun, IL; Lincoln, MO and 3 more areas |
| Headline | Severe Thunderstorm Warning issued March 15 at 3:48PM CDT until March 15 at 4:30PM CDT by NWS St Louis MO |
| Expires | 2026-03-15T16:30:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7329e4e7a11dc49350dd12ae96d0d962f2219e8a.001.1","noaa_urn:oid:2.49.0.1.840.0.91f7e33bdd8535c00d5346873497617549d2e628.001.1","noaa_urn:oid:2.49.0.1.840.0.ebdf230b059274598bf22efb7d2aa208a0e4dd46.001.1","noaa_urn:oid:2.49.0.1.840.0.c727db293b9d44af4a7524bdb4c1f473c51f45b8.001.1","noaa_urn:oid:2.49.0.1.840.0.7993469c5a2e133d21fe4a9afd04bf20af19e65a.002.1","noaa_urn:oid:2.49.0.1.840.0.e1588822bff93f47037142439e96572e509a65c0.002.1"] |
| Iem TypeSummary | O |
| Iem City | Belgrade |
| Iem County | Washington |
| Iem State | MO |
| Iem Wfo | LSX |
| Iem Remark | Estimated time of damage between 10:30 and 11:30 a.m., concrete statue of cow blown over and a flag post snapped in half near Belgrade. |
| MergedSources | [{"id":"iem_O_37.790_-90.840_1773590400000","source":"iem","severity":"low","severityValue":25,"timestamp":1773590400000,"latitude":37.79,"longitude":-90.84}] |
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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Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.