This alert expired on 21 June 2026 at 07:45 UTC. It is kept here as a record.
No stronger detection stands among the 105 recorded within 20 km of this point since 15 March 2026 — 21 others scored the same. Another comparable one was recorded here earlier the same day. 24 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 21 at 2:05AM CDT until June 21 at 2:45AM CDT by NWS Wichita KS
An estimated 419,628 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 27, 2026 · score 37 · 11.6 km
- June 16, 2026 · score 43 · 11.8 km
- June 18, 2026 · score 43 · 16.1 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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 | 90% |
| Coordinates | 37.5144, -97.4244 |
| Nearest City | Derby (14 km) |
| Population Exposed | 419.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T07:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c95eb877452a6146f89b84dbf3274fa0 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Harper, KS; Kingman, KS; Sumner, KS; Butler, KS; Chase, KS; Elk, KS; Greenwood, KS |
| Headline | Severe Thunderstorm Warning issued June 21 at 2:05AM CDT until June 21 at 2:45AM CDT by NWS Wichita KS |
| Expires | 2026-06-21T02:45:00-05:00 |
| SenderName | NWS Wichita KS |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c95eb877452a6146f89b84dbf3274fa0da18a50d.001.1","noaa_urn:oid:2.49.0.1.840.0.aef07f85712b2ae6f147cdbf293398374d6d72d2.002.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 65 |
| Iem Unit | MPH |
| Iem City | 2 NNW Andale |
| Iem County | Sedgwick |
| Iem State | KS |
| Iem Wfo | ICT |
| MergedSources | [{"id":"iem_G_37.540_-97.270_1782022860000","source":"iem","severity":"low","severityValue":25,"timestamp":1782022860000,"latitude":37.54,"longitude":-97.27},{"id":"iem_G_37.700_-97.270_1782022380000","source":"iem","severity":"low","severityValue":25,"timestamp":1782022380000,"latitude":37.7,"longitude":-97.27},{"id":"iem_G_37.660_-98.130_1782019200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782019200000,"latitude":37.66,"longitude":-98.13},{"id":"iem_G_37.740_-97.850_1782020160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782020160000,"latitude":37.74,"longitude":-97.85},{"id":"iem_G_37.780_-97.470_1782021480000","source":"iem","severity":"low","severityValue":25,"timestamp":1782021480000,"latitude":37.78,"longitude":-97.47},{"id":"iem_G_37.820_-97.640_1782020760000","source":"iem","severity":"low","severityValue":25,"timestamp":1782020760000,"latitude":37.82,"longitude":-97.64}] |
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.