Right now
The most recent data we hold from NOAA arrived 5 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 14:45 UTC. It is kept here as a record.
It is the 12th strongest of the 27 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 8:58AM CDT until June 11 at 9:45AM CDT by NWS Des Moines IA
Nearby, since 16 March 2026
- August 7, 2026 · score 22 · 11.3 km
- June 11, 2026 · score 58 · 20.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 41.6619, -92.3441 |
| Nearest City | Newton (59 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-11T13:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0b9a57d5e323be274f004072bce8f8d4 |
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: 2026-06-11T13:58:00.000Z.
First archived: 2026-06-11T14:02:02.041Z. 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 | Black Hawk, IA; Bremer, IA; Butler, IA; Franklin, IA; Grundy, IA; Buchanan, IA; Delaware, IA; Black Hawk, IA; Grundy, IA; Jasper, IA; Mahaska, IA; Marshall, IA; Poweshiek, IA; Tama, IA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 8:58AM CDT until June 11 at 9:45AM CDT by NWS Des Moines IA |
| Expires | 2026-06-11T09:45:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0b9a57d5e323be274f004072bce8f8d4ae7cb845.002.1","noaa_urn:oid:2.49.0.1.840.0.73df71712aa999ebb9779c99cb019e32dce7c058.001.1","noaa_urn:oid:2.49.0.1.840.0.03d3ac7f4daad819d32c52dc93adb30487e9c7aa.002.1","noaa_urn:oid:2.49.0.1.840.0.e4e2e2820c2a13b0d71258d2d3377dbc422da38d.001.1","noaa_urn:oid:2.49.0.1.840.0.55225d3e5b6bc87c30fcc8eb67a5c0f190728a47.001.1","noaa_urn:oid:2.49.0.1.840.0.4820399c7f0382580c972aab9e1f4aa33354c8ea.001.1","noaa_urn:oid:2.49.0.1.840.0.d048aab823e15dfad1b684fc666ada590031cf70.001.1","noaa_urn:oid:2.49.0.1.840.0.b1344f92f8372887da33fd27c474f61234f9a235.001.1"] |
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.
Want to know when something happens in this area?