This alert expired on 19 June 2026 at 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 86 recorded within 20 km of this point since 15 March 2026 — 24 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 6:43PM CDT until June 18 at 7:00PM CDT by NWS Wichita KS
An estimated 419,628 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 16, 2026 · score 43 · 4.3 km
- August 27, 2026 · score 37 · 10.1 km
- June 4, 2026 · score 43 · 13.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 79 % 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) | 43 / 100 |
| Our confidence | 79% |
| Coordinates | 37.3921, -97.3269 |
| Nearest City | Derby (18 km) |
| Population Exposed | 419.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T23:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.639fa5b4fd6e99e4cb29552658cc91d5 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cowley, KS; Sedgwick, KS; Sumner, KS |
| Headline | Severe Thunderstorm Warning issued June 18 at 6:43PM CDT until June 18 at 7:00PM CDT by NWS Wichita KS |
| Expires | 2026-06-18T19:00:00-05:00 |
| SenderName | NWS Wichita KS |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.639fa5b4fd6e99e4cb29552658cc91d5b18c3b83.002.1","noaa_urn:oid:2.49.0.1.840.0.b9ff0729c51fb2faf5bdcb8d82611218c9efc8b2.001.1"] |
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 43/100, near Derby (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.