This alert expired on 7 August 2026 at 14:30 UTC. It is kept here as a record.
No stronger detection stands among the 51 recorded within 20 km of this point since 19 May 2026 — 15 others scored the same. The last comparable one was on 10 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 8:43AM CDT until August 7 at 9:30AM CDT by NWS Norman OK
An estimated 419,628 people live within 50 km of this point.
Nearby, since 19 May 2026
- July 10, 2026 · score 43 · 10.9 km
- June 27, 2026 · score 43 · 11.6 km
- June 18, 2026 · score 43 · 19.6 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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 | 91% |
| Coordinates | 37.3344, -97.1167 |
| Nearest City | Derby (28 km) |
| Population Exposed | 419.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T13:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8f1ae61dbd0b8571c059a42c0e7bb8b8 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grant, OK; Kay, OK; Noble, OK; Butler, KS; Chase, KS; Marion, KS |
| Headline | Severe Thunderstorm Warning issued August 7 at 8:43AM CDT until August 7 at 9:30AM CDT by NWS Norman OK |
| Expires | 2026-08-07T09:30:00-05:00 |
| SenderName | NWS Norman OK |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8f1ae61dbd0b8571c059a42c0e7bb8b80d949b25.001.1","noaa_urn:oid:2.49.0.1.840.0.7369be59fa1ba9a7d6539a24920db60f8e341ade.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 NNW Derby |
| Iem County | Sedgwick |
| Iem State | KS |
| Iem Wfo | ICT |
| MergedSources | [{"id":"iem_H_37.560_-97.320_1786099920000","source":"iem","severity":"low","severityValue":25,"timestamp":1786099920000,"latitude":37.56,"longitude":-97.32},{"id":"iem_H_37.750_-97.300_1786100460000","source":"iem","severity":"low","severityValue":25,"timestamp":1786100460000,"latitude":37.75,"longitude":-97.3},{"id":"iem_H_37.720_-96.970_1786108020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786108020000,"latitude":37.72,"longitude":-96.97},{"id":"iem_H_37.700_-96.970_1786108080000","source":"iem","severity":"low","severityValue":25,"timestamp":1786108080000,"latitude":37.7,"longitude":-96.97},{"id":"iem_G_37.750_-97.220_1786095660000","source":"iem","severity":"low","severityValue":25,"timestamp":1786095660000,"latitude":37.75,"longitude":-97.22},{"id":"iem_H_37.580_-97.320_1786099020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786099020000,"latitude":37.58,"longitude":-97.32},{"id":"iem_H_37.570_-97.270_1786099380000","source":"iem","severity":"low","severityValue":25,"timestamp":1786099380000,"latitude":37.57,"longitude":-97.27}] |
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.