This alert expired on 18 May 2026 at 19:15 UTC. It is kept here as a record.
It is the 8th strongest of the 30 detections recorded within 20 km of this point since 16 April 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 1:38PM CDT until May 18 at 2:15PM CDT by NWS Springfield MO
Nearby, since 16 April 2026
- May 18, 2026 · score 43 · 9.1 km
- June 18, 2026 · score 43 · 19.1 km
- July 9, 2026 · score 43 · 22.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 59 % 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) | 22 / 100 |
| Our confidence | 59% |
| Coordinates | 37.7112, -93.2537 |
| Nearest City | Springfield (55 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T18:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4c100761136e8811dae6805fccd659e89e552f35.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Polk, MO |
| Headline | Severe Thunderstorm Warning issued May 18 at 1:38PM CDT until May 18 at 2:15PM CDT by NWS Springfield MO |
| Expires | 2026-05-18T14:15:00-05:00 |
| SenderName | NWS Springfield MO |
| HasExactCoords | true |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.