This alert expired on 28 June 2026 at 20:00 UTC. It is kept here as a record.
It is the 6th strongest of the 49 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 28 at 2:34PM CDT until June 28 at 3:00PM CDT by NWS Quad Cities IA IL
An estimated 140,657 people live within 50 km of this point.
Nearby, since 11 March 2026
- March 11, 2026 · score 49 · 8.0 km
- July 6, 2026 · score 43 · 26.5 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % 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 | 85% |
| Coordinates | 41.8987, -90.2488 |
| Nearest City | Clinton (8 km) |
| Population Exposed | 140.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-28T19:34:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.069b8c3bf143212b82ea39e0821777513f4ffd07.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carroll, IL; Whiteside, IL; Clinton, IA |
| Headline | Severe Thunderstorm Warning issued June 28 at 2:34PM CDT until June 28 at 3:00PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-28T15:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | Monmouth |
| Iem County | Jackson |
| Iem State | IA |
| Iem Wfo | DVN |
| MergedSources | [{"id":"iem_G_42.070_-90.880_1782671580000","source":"iem","severity":"low","severityValue":25,"timestamp":1782671580000,"latitude":42.07,"longitude":-90.88}] |
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 Clinton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.