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 04:45 UTC. It is kept here as a record.
It is the 7th strongest of the 27 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 10:54PM CDT until May 15 at 11:45PM CDT by NWS La Crosse WI
Nearby, since 16 March 2026
- May 16, 2026 · score 22 · 15.9 km
- July 11, 2026 · score 22 · 17.4 km
- July 9, 2026 · score 22 · 26.3 km
How we know
Confirmed by 3 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 | 42.8434, -91.6614 |
| Nearest City | Waterloo (68 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-16T03:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c4a8c72115b9f4be43e00ceaf5ae3555 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Crawford, WI; Grant, WI; Buchanan, IA; Black Hawk, IA; Bremer, IA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued May 15 at 10:54PM CDT until May 15 at 11:45PM CDT by NWS La Crosse WI |
| Expires | 2026-05-15T23:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c4a8c72115b9f4be43e00ceaf5ae3555d2b497b9.001.1","noaa_urn:oid:2.49.0.1.840.0.b72ece7c9645da91526fc6075c5722f4db933bc9.001.1","noaa_urn:oid:2.49.0.1.840.0.7c035096be576c4c1238d7c7ca9e7656b4dab0e4.001.1","noaa_urn:oid:2.49.0.1.840.0.9ae19833103bb225a6af00a688a013a85ba522d2.002.1","noaa_urn:oid:2.49.0.1.840.0.e0c964909b412b637faa8be7810c24c72ff702b3.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 2 N Ionia |
| Iem County | Chickasaw |
| Iem State | IA |
| Iem Wfo | ARX |
| Iem Remark | Mesonet station RNHI4 New Hampton. |
| MergedSources | [{"id":"iem_G_42.670_-91.920_1778902740000","source":"iem","severity":"low","severityValue":25,"timestamp":1778902740000,"latitude":42.67,"longitude":-91.92},{"id":"iem_G_43.070_-92.460_1778898600000","source":"iem","severity":"low","severityValue":25,"timestamp":1778898600000,"latitude":43.07,"longitude":-92.46}] |
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.