Right now
The most recent data we hold from NOAA arrived 36 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 16 May 2026 at 00:00 UTC. It is kept here as a record.
It is the 5th strongest of the 20 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 6:14PM CDT until May 15 at 7:00PM CDT by NWS Des Moines IA
Nearby, since 16 March 2026
- May 15, 2026 · score 22 · 17.0 km
- May 18, 2026 · score 46 · 20.9 km
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 | 0.59/1 |
| Coordinates | 42.3857, -95.1746 |
| Nearest City | Fort Dodge (83 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.e9f03a92e934aed8fec1a062bb0c699e |
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: 2026-05-15T23:15:05.904Z. 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 | Humboldt, IA; Kossuth, IA; Palo Alto, IA; Pocahontas, IA; Cherokee, IA; O'Brien, IA; Plymouth, IA; Sioux, IA; Ida, IA; Woodbury, IA and 4 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 6:14PM CDT until May 15 at 7:00PM CDT by NWS Des Moines IA |
| Expires | 2026-05-15T19:00:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e9f03a92e934aed8fec1a062bb0c699e3402d95f.001.1","noaa_urn:oid:2.49.0.1.840.0.46099e61b1b84959a35032a608b3c9a37a1bc4c5.001.1","noaa_urn:oid:2.49.0.1.840.0.1e6dbbd10bbce319d9b3e5f9ab3173a5bb1e8f05.001.1","noaa_urn:oid:2.49.0.1.840.0.f2dba20123ea29b6d884ddb5688452b27745d68e.001.1","noaa_urn:oid:2.49.0.1.840.0.83cdd145936b753f556bd6ce16afa14b11fda46d.001.1","noaa_urn:oid:2.49.0.1.840.0.e635f84314d872c549e8fb49dcaa8739845c09c6.001.1","noaa_urn:oid:2.49.0.1.840.0.061a2e3f60759d4b61b1a855992def010845dd2f.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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