Right now
The most recent data we hold from NOAA arrived 5 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 02:45 UTC. It is kept here as a record.
It is the 5th strongest of the 11 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 8:54PM CDT until May 15 at 9:45PM CDT by NWS Sioux Falls SD
Nearby, since 16 March 2026
- July 3, 2026 · score 34 · 17.9 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 22 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 70% |
| Coordinates | 42.8500, -93.7710 |
| Nearest City | Fort Dodge (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-16T01:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ead0d93536345d7eabf78c4cb61ecd46 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Buena Vista, IA; Cherokee, IA; Cerro Gordo, IA; Franklin, IA; Humboldt, IA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 8:54PM 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 | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ead0d93536345d7eabf78c4cb61ecd4679a0ab06.001.1","noaa_urn:oid:2.49.0.1.840.0.4e2d901b5cf4681318093ca06d44e3113e516809.002.1","noaa_urn:oid:2.49.0.1.840.0.dc8dbc526bb44582de10861e0f9085b088a1f56a.002.1","noaa_urn:oid:2.49.0.1.840.0.f5e3c06e2e52409c6ddaf8297c7452d1e6f47d45.001.1","noaa_urn:oid:2.49.0.1.840.0.ba8048c6f5ec1d817aeb042d234c25a4664f82fb.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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.