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 03:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 22 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 9:52PM CDT until May 17 at 10:45PM CDT by NWS Twin Cities/Chanhassen MN
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 70 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 70% |
| Coordinates | 43.1237, -93.9777 |
| Nearest City | Mason City (63 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T02:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.b0f65f1fe1656f36ae1e1fe5d433c7df |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Faribault, MN; Freeborn, MN; Kossuth, IA; Winnebago, IA; Humboldt, IA; Kossuth, IA; Palo Alto, IA; Pocahontas, IA and 4 more areas |
| Headline | Tornado Warning issued May 17 at 9:52PM CDT until May 17 at 10:45PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-05-17T22:45:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b0f65f1fe1656f36ae1e1fe5d433c7dffdf6f52a.001.1","noaa_urn:oid:2.49.0.1.840.0.ce41df0ce20c754004b69feac0a9d1a56a2abc70.002.1","noaa_urn:oid:2.49.0.1.840.0.1b48085945e9462ec7caba4fed7f799b574d95c3.001.1","noaa_urn:oid:2.49.0.1.840.0.81a232f31072cb368524f6f3874e677e00485301.001.1","noaa_urn:oid:2.49.0.1.840.0.5e659bdb723a1b5326278109cc7a23083396e5c2.002.1","noaa_urn:oid:2.49.0.1.840.0.f0421bf8bbef819e70ea92243cd3435a81d9c1e7.001.1","noaa_urn:oid:2.49.0.1.840.0.2b7f94cf7bbc609f35ecab8344526de534fd0b52.001.1"] |
| Iem TypeSummary | T |
| Iem City | 2 SSE Havelock |
| Iem County | Pocahontas |
| Iem State | IA |
| Iem Wfo | DMX |
| Iem Remark | Between Pocahontas and Havelock. |
| MergedSources | [{"id":"iem_T_43.350_-94.500_1779071280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779071280000,"latitude":43.35,"longitude":-94.5},{"id":"iem_T_42.810_-94.680_1779069900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779069900000,"latitude":42.81,"longitude":-94.68}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.