Right now
The most recent data we hold from NOAA arrived 3 hours 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 16 May 2026 at 00:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 12 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 May 15 at 6:40PM CDT until May 15 at 7:15PM CDT by NWS Des Moines IA
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 42.3711, -94.9681 |
| Nearest City | Fort Dodge (67 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-05-15 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a76ac3761b40268f177424332483b7ff |
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: 2026-05-15 — time not reported.
First archived: 2026-05-15T23:41:19.305Z. 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 | Calhoun, IA; Pocahontas, IA; Blue Earth, MN; Faribault, MN; Ida, IA; Woodbury, IA and 7 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 6:40PM CDT until May 15 at 7:15PM CDT by NWS Des Moines IA |
| Expires | 2026-05-15T19:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a76ac3761b40268f177424332483b7ffe6c6c6a4.002.1","noaa_urn:oid:2.49.0.1.840.0.82b118a840c518c7af4bdfb2561c3b947dd33f58.001.1","noaa_urn:oid:2.49.0.1.840.0.302d595acdef6201233bb0ec541ee29a97ad3372.001.1","noaa_urn:oid:2.49.0.1.840.0.436b08361f2b1a57af91072c1be390a784f11ef1.001.1","noaa_urn:oid:2.49.0.1.840.0.fc9b8cda09196c2931db842901b9d52449ca7d7d.002.1","noaa_urn:oid:2.49.0.1.840.0.12adf8e576dba91e5b443bbfef2657f42ed76c32.001.1","noaa_urn:oid:2.49.0.1.840.0.aacb82868d64dc6f6e0edfa8aacfeb411a12d859.001.1","noaa_urn:oid:2.49.0.1.840.0.f4667d18e4fc5a71318a3894a98f6ce1a38eabb8.001.1","noaa_urn:oid:2.49.0.1.840.0.df4ab30e13c7260558904b633d3e32a210ce8ecb.001.1","noaa_urn:oid:2.49.0.1.840.0.c1146adb0f53e85cf72c2d22ac4ad9ba749c818a.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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