This alert expired on 4 July 2026 at 01:30 UTC. It is kept here as a record.
It is the 6th strongest of the 27 detections recorded within 20 km of this point since 31 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:18PM CDT until July 3 at 8:30PM CDT by NWS Quad Cities IA IL
An estimated 56,440 people live within 50 km of this point.
Nearby, since 31 March 2026
- July 6, 2026 · score 43 · 19.3 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 90 % 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) | 39 / 100 |
| Our confidence | 90% |
| Coordinates | 41.7648, -89.8133 |
| Nearest City | Sterling (10 km) |
| Population Exposed | 56.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.21ce7ac7708990829698b30134518ff6 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Rock Island, IL; Lee, IL; Ogle, IL |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:18PM CDT until July 3 at 8:30PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-07-03T20:30:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.21ce7ac7708990829698b30134518ff6ff6fc6e7.002.1","noaa_urn:oid:2.49.0.1.840.0.b8fe9fda114bc0dc2f76b9286f16ef212cb77973.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 SE Scioto Mills |
| Iem County | Stephenson |
| Iem State | IL |
| Iem Wfo | DVN |
| Iem Remark | Tree fell and took down power lines. |
| MergedSources | [{"id":"iem_G_41.890_-89.080_1783122900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122900000,"latitude":41.89,"longitude":-89.08},{"id":"iem_D_42.330_-89.640_1783118280000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118280000,"latitude":42.33,"longitude":-89.64}] |
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 39/100, near Sterling (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.