Right now
The most recent data we hold from NOAA arrived 4 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 6 June 2026 at 08:00 UTC. It is kept here as a record.
It is the 208th strongest of the 246 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 5 June 2026. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued June 5 at 9:50PM CDT until June 6 at 3:00AM CDT by NWS Quad Cities IA IL
An estimated 181,553 people live within 50 km of this point.
Nearby, since 10 March 2026
- September 6, 2026 · score 37 · 0.0 km
- September 2, 2026 · score 37 · 0.0 km
- September 1, 2026 · score 37 · 0.0 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 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 80% |
| Coordinates | 42.0000, -93.2000 |
| Nearest City | Marshalltown (25 km) |
| Population Exposed | 181.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-06T02:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.550bb6b9329a1c678b65da6d3e62383a |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Henry, IA; Iowa, IA; Jefferson, IA; Johnson, IA; Keokuk, IA; Van Buren, IA; Washington, IA; Fremont, IA; Mills, IA; Montgomery, IA; Page, IA; Pottawattamie, IA; Butler, NE; Cass, NE; Douglas, NE; Gage, NE; Jefferson, NE; Johnson, NE; Lancaster, NE; Nemaha, NE; Otoe, NE; Pawnee, NE; Richardson, NE; Saline, NE; Sarpy, NE; Saunders, NE; Seward, NE |
| Headline | Severe Thunderstorm Watch issued June 5 at 9:50PM CDT until June 6 at 3:00AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-06T03:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.550bb6b9329a1c678b65da6d3e62383a3e78ce76.001.1","noaa_urn:oid:2.49.0.1.840.0.160a6142593f8f6575fa10e7061d266ab0a4bcea.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.
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