This alert expired on 9 June 2026 at 06:30 UTC. It is kept here as a record.
It is the 2nd strongest of the 106 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 1 June 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 9 at 12:48AM CDT until June 9 at 1:30AM CDT by NWS Kansas City/Pleasant Hill MO
An estimated 1,611,297 people live within 50 km of this point.
Nearby, since 10 March 2026
- March 11, 2026 · score 58 · 9.8 km
- May 19, 2026 · score 52 · 11.8 km
- August 10, 2026 · score 52 · 14.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 81 % 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) | 52 / 100 |
| Our confidence | 81% |
| Coordinates | 38.8760, -94.8887 |
| Nearest City | Olathe (6 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-09T05:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.dba6d139e9b835c1a692886819523b74b55b5e09.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Johnson, KS; Leavenworth, KS; Linn, KS; Miami, KS; Wyandotte, KS; Bates, MO; Cass, MO; Jackson, MO |
| Headline | Severe Thunderstorm Warning issued June 9 at 12:48AM CDT until June 9 at 1:30AM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-06-09T01:30:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill 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 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 52/100, near Olathe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.