This alert expired on 11 June 2026 at 15:00 UTC. It is kept here as a record.
It is the 10th strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 9:50AM CDT until June 11 at 10:00AM CDT by NWS Kansas City/Pleasant Hill MO
An estimated 118,796 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 16, 2026 · score 43 · 10.6 km
- July 16, 2026 · score 43 · 14.2 km
- July 15, 2026 · score 43 · 14.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Our confidence | 81% |
| Coordinates | 41.3179, -91.2530 |
| Nearest City | Muscatine (21 km) |
| Population Exposed | 118.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T14:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bb93942be36c20d61abec4e105a267d4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adair, MO; Linn, MO; Macon, MO; Putnam, MO; Schuyler, MO; Sullivan, MO; Henderson, IL; Mercer, IL; Warren, IL; Des Moines, IA; Henry, IA; Louisa, IA; Cedar, IA; Clinton, IA; Dubuque, IA; Jackson, IA; Johnson, IA; Jones, IA; Linn, IA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 9:50AM CDT until June 11 at 10:00AM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-06-11T10:00:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bb93942be36c20d61abec4e105a267d4da2be39f.001.1","noaa_urn:oid:2.49.0.1.840.0.2db380951053ec2668518fd0e7a93d1f01243aaf.001.1","noaa_urn:oid:2.49.0.1.840.0.82bc2031ba8e48f9f8fcba993018f029ae317340.001.1","noaa_urn:oid:2.49.0.1.840.0.c4b75e8440dcf18bfe778ff1de3b77bb6b9833dd.002.1"] |
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.
Want to know when something happens near Muscatine?
Calamity.live data shows a weather event with CalamityScore 37/100, near Muscatine (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.