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.
This alert expired on 7 August 2026 at 22:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 4:16PM CDT until August 7 at 5:15PM CDT by NWS Des Moines IA
Urban PEI: 109,715 within a heuristic 50 km radius; not unique people.
How we know
3 recorded sources include NOAA; independence is not established by this count.
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 | 0.88/1 |
| Coordinates | 42.5791, -92.0004 |
| Nearest City | Waterloo (30 km) |
| Urban exposure index (PEI) | 109.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T21:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7b09c55f57af72cd8117b12f5fb1b616 |
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: 2026-08-07T21:16:00.000Z.
First archived: 2026-08-07T21:19:10.797Z. 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; Grundy, IA; Tama, IA; Buchanan, IA; Fayette, IA |
| Headline | Severe Thunderstorm Warning issued August 7 at 4:16PM CDT until August 7 at 5:15PM CDT by NWS Des Moines IA |
| Expires | 2026-08-07T17:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7b09c55f57af72cd8117b12f5fb1b6161dd88d59.001.1","noaa_urn:oid:2.49.0.1.840.0.e1416680b90de40b7050b9e2fa6d4ad3f3e7b75b.001.1","noaa_urn:oid:2.49.0.1.840.0.124fb580053eafffb0c9ad9aaabfc7381bfcca7e.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 7 E Greene |
| Iem County | Butler |
| Iem State | IA |
| Iem Wfo | DMX |
| Iem Remark | Report via mPING. Time estimated via radar. |
| MergedSources | [{"id":"iem_G_42.670_-92.330_1786135500000","source":"iem","severity":"low","severityValue":25,"timestamp":1786135500000,"latitude":42.67,"longitude":-92.33},{"id":"iem_H_42.890_-92.670_1786132440000","source":"iem","severity":"low","severityValue":25,"timestamp":1786132440000,"latitude":42.89,"longitude":-92.67}] |
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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