This alert expired on 13 August 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 6 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 6:38PM CDT until August 12 at 7:30PM CDT by NWS Springfield MO
An estimated 35,080 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 31, 2026 · score 34 · 8.4 km
- August 12, 2026 · score 34 · 12.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 77 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 77% |
| Coordinates | 37.5794, -91.8551 |
| Nearest City | Fort Leonard Wood (31 km) |
| Population Exposed | 35.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T23:38:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cc1b728b7c0a85fdd9c3aaacbf1485c3 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dent, MO; Phelps, MO; Ste. Genevieve, MO; St. Francois, MO; Washington, MO; Jefferson, MO; Washington, MO and 2 more areas |
| Headline | Severe Thunderstorm Warning issued August 12 at 6:38PM CDT until August 12 at 7:30PM CDT by NWS Springfield MO |
| Expires | 2026-08-12T19:30:00-05:00 |
| SenderName | NWS Springfield MO |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cc1b728b7c0a85fdd9c3aaacbf1485c3160aae42.001.1","noaa_urn:oid:2.49.0.1.840.0.62b67657dd047abea60f7cc822e68ebc0d9dedec.001.1","noaa_urn:oid:2.49.0.1.840.0.ddaed632e859b1c9352cfc8295cb6f4275a8b7d4.002.1","noaa_urn:oid:2.49.0.1.840.0.f8b997f63acc254866e8d44ed57583e3c8e2164a.001.1","noaa_urn:oid:2.49.0.1.840.0.1b9186e0a7a72ad5e4d702b9c2a256f0cab5ce18.001.1"] |
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 10 February 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.
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 188 scientific monitoring sources.