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 18 May 2026 at 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 9:07PM CDT until May 17 at 9:15PM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- May 15, 2026 · score 22 · 10.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 42.4671, -94.9897 |
| Nearest City | Fort Dodge (67 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T02:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.82cbe480d3cdd018b7bbf233c56ffe9f |
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: 2026-05-18T02:07:00.000Z.
First archived: 2026-05-18T02:09:25.944Z. 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 | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mills, IA; Mills, IA; Montgomery, IA; Pottawattamie, IA; Calhoun, IA; Hamilton, IA; Humboldt, IA; Pocahontas, IA; Webster, IA; Wright, IA and 3 more areas |
| Headline | Tornado Warning issued May 17 at 9:07PM CDT until May 17 at 9:15PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T21:15:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.82cbe480d3cdd018b7bbf233c56ffe9fb752f0e1.001.1","noaa_urn:oid:2.49.0.1.840.0.8a827436913ca2ed3f061bf0a817cab0112a7dda.001.1","noaa_urn:oid:2.49.0.1.840.0.b56f9b5d83290299020f057c321a6f18467c96d2.001.1","noaa_urn:oid:2.49.0.1.840.0.d139bfdc1aa832e98d393c977930edfffa73df4b.001.1","noaa_urn:oid:2.49.0.1.840.0.ddf3691257aa695ccfc343abf79cf684210a7495.001.1","noaa_urn:oid:2.49.0.1.840.0.a1bed2bcf863f361803ceadd2529b2c0dabc7f2b.001.1","noaa_urn:oid:2.49.0.1.840.0.d9df80bc042fa3611827992fca6e48ba219d62c4.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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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