Right now
The most recent data we hold from NOAA arrived 3 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 02:31 UTC. It is kept here as a record.
No stronger detection stands among the 7 recorded within 20 km of this point since 16 May 2026 — 4 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 15 at 9:22PM CDT until May 15 at 9:30PM CDT by NWS La Crosse WI
An estimated 24,649 people live within 50 km of this point.
Nearby, since 16 May 2026
- July 3, 2026 · score 34 · 18.6 km
How we know
Confirmed by 20 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 | 42.7749, -94.1472 |
| Nearest City | Fort Dodge (31 km) |
| Population Exposed | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-16T02:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8cc52fe0dd62c9f01df2cbcd60ce4584 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chickasaw, IA; Floyd, IA; Pocahontas, IA; Buena Vista, IA |
| Headline | Severe Thunderstorm Warning issued May 15 at 9:22PM CDT until May 15 at 9:30PM CDT by NWS La Crosse WI |
| Expires | 2026-05-15T21:31:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8cc52fe0dd62c9f01df2cbcd60ce4584264813e9.001.1","noaa_urn:oid:2.49.0.1.840.0.82ccc9d47a9f915a5915d1033dd7a283d7e9b7d1.001.1","noaa_urn:oid:2.49.0.1.840.0.bbaf199c9cb30ac31aabe5fb72f4dd13b6e30977.001.1"] |
| 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_42.660_-94.240_1778895900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778895900000,"latitude":42.66,"longitude":-94.24},{"id":"iem_H_42.740_-94.680_1778890860000","source":"iem","severity":"low","severityValue":25,"timestamp":1778890860000,"latitude":42.74,"longitude":-94.68},{"id":"iem_H_43.390_-94.480_1778886540000","source":"iem","severity":"low","severityValue":25,"timestamp":1778886540000,"latitude":43.39,"longitude":-94.48},{"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_43.100_-93.800_1778893560000","source":"iem","severity":"low","severityValue":25,"timestamp":1778893560000,"latitude":43.1,"longitude":-93.8},{"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_43.140_-93.380_1778892420000","source":"iem","severity":"low","severityValue":25,"timestamp":1778892420000,"latitude":43.14,"longitude":-93.38},{"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_43.030_-93.340_1778893200000","source":"iem","severity":"low","severityValue":25,"timestamp":1778893200000,"latitude":43.03,"longitude":-93.34},{"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_42.930_-93.790_1778891100000","source":"iem","severity":"low","severityValue":25,"timestamp":1778891100000,"latitude":42.93,"longitude":-93.79},{"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_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_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.