Right now
The most recent data we hold from NOAA arrived 1 minute 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 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 11 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. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 9:04PM CDT until May 15 at 9:45PM CDT by NWS Sioux Falls SD
An estimated 24,649 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 3, 2026 · score 34 · 16.6 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % 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 | Medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 90% |
| Coordinates | 42.8110, -93.7505 |
| Nearest City | Fort Dodge (49 km) |
| Population Exposed | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-16T02:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ed08f5e463b57c253969814c1f8dc682 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Buena Vista, IA; Cerro Gordo, IA; Hamilton, IA; Humboldt, IA; Webster, IA; Wright, IA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 9:04PM CDT until May 15 at 9:45PM CDT by NWS Sioux Falls SD |
| Expires | 2026-05-15T21:45:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ed08f5e463b57c253969814c1f8dc68234267223.002.1","noaa_urn:oid:2.49.0.1.840.0.4237467f51463a0a9341b4bd02d32656f0b1d319.002.1","noaa_urn:oid:2.49.0.1.840.0.ac1ddd696bfd384a301e7ffb1f2d21707df949cb.001.1","noaa_urn:oid:2.49.0.1.840.0.9c26b8f60f11b2695337c44bdfd17820b920edab.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 WNW Meservey |
| Iem County | Hancock |
| Iem State | IA |
| Iem Wfo | DMX |
| MergedSources | [{"id":"iem_H_43.190_-93.910_1778891640000","source":"iem","severity":"low","severityValue":25,"timestamp":1778891640000,"latitude":43.19,"longitude":-93.91},{"id":"iem_H_42.920_-93.500_1778893500000","source":"iem","severity":"low","severityValue":25,"timestamp":1778893500000,"latitude":42.92,"longitude":-93.5},{"id":"iem_D_43.290_-94.220_1778887500000","source":"iem","severity":"low","severityValue":25,"timestamp":1778887500000,"latitude":43.29,"longitude":-94.22},{"id":"iem_H_42.930_-93.790_1778890920000","source":"iem","severity":"low","severityValue":25,"timestamp":1778890920000,"latitude":42.93,"longitude":-93.79},{"id":"iem_H_43.290_-94.220_1778887440000","source":"iem","severity":"low","severityValue":25,"timestamp":1778887440000,"latitude":43.29,"longitude":-94.22},{"id":"iem_H_43.230_-93.910_1778889480000","source":"iem","severity":"low","severityValue":25,"timestamp":1778889480000,"latitude":43.23,"longitude":-93.91},{"id":"iem_H_43.100_-93.600_1778894040000","source":"iem","severity":"low","severityValue":25,"timestamp":1778894040000,"latitude":43.1,"longitude":-93.6},{"id":"iem_H_42.920_-93.610_1778892300000","source":"iem","severity":"low","severityValue":25,"timestamp":1778892300000,"latitude":42.92,"longitude":-93.61},{"id":"iem_H_42.920_-93.500_1778893380000","source":"iem","severity":"low","severityValue":25,"timestamp":1778893380000,"latitude":42.92,"longitude":-93.5}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.