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 16 May 2026 at 00:45 UTC. It is kept here as a record.
It is the 6th strongest of the 19 detections recorded within 20 km of this point since 16 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 7:13PM CDT until May 15 at 7:45PM CDT by NWS Des Moines IA
An estimated 24,649 people live within 50 km of this point.
Nearby, since 16 May 2026
- May 18, 2026 · score 58 · 10.6 km
How we know
Confirmed by 5 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 | 42.6589, -94.6631 |
| Nearest City | Fort Dodge (44 km) |
| Population Exposed | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-16T00:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.99b816ad6bd455825303aba463f05ebf |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Humboldt, IA; Pocahontas, IA; Clay, IA; O'Brien, IA; Adair, IA; Adams, IA; Cass, IA; Ringgold, IA; Taylor, IA; Union, IA and 5 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 7:13PM CDT until May 15 at 7:45PM CDT by NWS Des Moines IA |
| Expires | 2026-05-15T19:45:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.99b816ad6bd455825303aba463f05ebfad6bf83a.001.1","noaa_urn:oid:2.49.0.1.840.0.bf6404bb9563acdfeada927d912b5d9c884d0988.001.1","noaa_urn:oid:2.49.0.1.840.0.cf3cb3a6cae8e9012b1cdab4b3e594cbe24b184a.001.1","noaa_urn:oid:2.49.0.1.840.0.209fb5e39b673228ff91e939e8cd869ba3821a45.001.1","noaa_urn:oid:2.49.0.1.840.0.f869cf9306b5442ea441ead89246955d18e7f0f9.001.1","noaa_urn:oid:2.49.0.1.840.0.2340c841471a7c92aa2d28fe825fb9c061877128.001.1","noaa_urn:oid:2.49.0.1.840.0.43a6d30be726db40a00df2964411097c56d278b1.002.1","noaa_urn:oid:2.49.0.1.840.0.a2913f0d033fdb2d9122dae6681ba796e042f4d7.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | 3 SSE Alta |
| Iem County | Buena Vista |
| Iem State | IA |
| Iem Wfo | FSD |
| MergedSources | [{"id":"iem_H_43.300_-94.510_1778886180000","source":"iem","severity":"low","severityValue":25,"timestamp":1778886180000,"latitude":43.3,"longitude":-94.51},{"id":"iem_H_42.600_-95.000_1778888580000","source":"iem","severity":"low","severityValue":25,"timestamp":1778888580000,"latitude":42.6,"longitude":-95},{"id":"iem_H_43.300_-94.510_1778885940000","source":"iem","severity":"low","severityValue":25,"timestamp":1778885940000,"latitude":43.3,"longitude":-94.51},{"id":"iem_H_42.630_-95.270_1778888160000","source":"iem","severity":"low","severityValue":25,"timestamp":1778888160000,"latitude":42.63,"longitude":-95.27}] |
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.