Right now
The most recent data we hold from NOAA arrived 31 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 11 June 2026 at 15:30 UTC. It is kept here as a record.
It is the 11th strongest of the 51 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 9:30AM CDT until June 11 at 10:30AM CDT by NWS Quad Cities IA IL
Urban PEI: 110,759 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- June 13, 2026 · score 43 · 7.9 km
- July 8, 2026 · score 43 · 12.7 km
- August 8, 2026 · score 43 · 12.9 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 41.5869, -91.8754 |
| Nearest City | Coralville (27 km) |
| Urban exposure index (PEI) | 110.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T14:30:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c2f9fb80737dc9a6fc650ecabb2d598d |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-11T14:30:00.000Z.
First archived: 2026-06-11T14:32:35.710Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mercer, IL; Rock Island, IL; Cedar, IA; Clinton, IA; Jackson, IA; Johnson, IA; Louisa, IA; Muscatine, IA; Scott, IA; Black Hawk, IA; Bremer, IA; Butler, IA; Grundy, IA; Benton, IA; Buchanan, IA; Delaware, IA; Iowa, IA; Johnson, IA; Linn, IA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 9:30AM CDT until June 11 at 10:30AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-11T10:30:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c2f9fb80737dc9a6fc650ecabb2d598dde8146a2.001.1","noaa_urn:oid:2.49.0.1.840.0.1c4b66c1f10f4e07a48ea0a87cd2f4d759e9fb79.002.1","noaa_urn:oid:2.49.0.1.840.0.7e25b59fe59866139fdad84b82ccd037e34024ee.001.1","noaa_urn:oid:2.49.0.1.840.0.d4a36a00a78fed3f30ae794fe1c98dd25359094c.001.1","noaa_urn:oid:2.49.0.1.840.0.57019504d376703c1220677c801af846402573f7.001.1","noaa_urn:oid:2.49.0.1.840.0.29a9fb9a6cd5752fff2be85f5213a261b98cc612.001.1","noaa_urn:oid:2.49.0.1.840.0.46b08802daaaf32a774b9111058afd5027b7bbd3.001.1"] |
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 8 March 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.
Review the area, threshold and delivery channel in your account.
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