This alert expired on 21 June 2026 at 05:15 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 18 May 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 June 20 at 11:51PM CDT until June 21 at 12:15AM CDT by NWS Topeka KS
An estimated 57,286 people live within 50 km of this point.
Nearby, since 18 May 2026
- May 18, 2026 · score 34 · 19.8 km
- July 10, 2026 · score 34 · 25.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 80 % 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 38.2510, -98.3528 |
| Nearest City | Great Bend (38 km) |
| Population Exposed | 57.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T04:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4dec9bbe5499918dbafc069ecff1be4d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marshall, KS; Nemaha, KS; Pottawatomie, KS; Riley, KS; Barton, KS; Ellsworth, KS; Lincoln, KS; Russell, KS; Clark, KS; Edwards, KS; Ford, KS; Kiowa, KS and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 20 at 11:51PM CDT until June 21 at 12:15AM CDT by NWS Topeka KS |
| Expires | 2026-06-21T00:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4dec9bbe5499918dbafc069ecff1be4d94a0de65.001.1","noaa_urn:oid:2.49.0.1.840.0.e7c6407b41d23a8cab8ab4cbcc384605f34f5522.001.1","noaa_urn:oid:2.49.0.1.840.0.78e526e2d00fa38ba9f98f634d1ecffecbd9dda8.002.1","noaa_urn:oid:2.49.0.1.840.0.7c15ee1d7562bc718c1f89ef5f617d6f722326ed.001.1","noaa_urn:oid:2.49.0.1.840.0.e63379aa8efd9ddee91781102fcc4ef056b96ddc.001.1","noaa_urn:oid:2.49.0.1.840.0.baf42d39e9c9b5358a3b7b8602765953abcbc44a.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 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 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.