This alert expired on 11 June 2026 at 14:49 UTC. It is kept here as a record.
No stronger detection stands among the 45 recorded within 20 km of this point since 10 March 2026 — 3 others scored the same. 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: Tornado Warning issued June 11 at 9:40AM CDT until June 11 at 9:45AM CDT by NWS Quad Cities IA IL
An estimated 24,624 people live within 50 km of this point.
Nearby, since 10 March 2026
- June 18, 2026 · score 28 · 5.7 km
- August 13, 2026 · score 58 · 14.5 km
- March 10, 2026 · score 40 · 23.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 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 | critical |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 81% |
| Coordinates | 41.1394, -92.0975 |
| Nearest City | Ottumwa (29 km) |
| Population Exposed | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T14:40:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Johnson, IA; Linn, IA; Putnam, MO; Schuyler, MO |
| Headline | Tornado Warning issued June 11 at 9:40AM CDT until June 11 at 9:45AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-11T09:49:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7537ff2d6bb2c3917980624b700173fd42f69a12.001.1","noaa_urn:oid:2.49.0.1.840.0.7ecc5c4b3c29d143adc27d467c2a3c89255fc7e6.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 58/100, near Ottumwa (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.