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 05:15 UTC. It is kept here as a record.
It is the 6th strongest of the 30 detections recorded within 20 km of this point since 14 April 2026. 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 11:55PM CDT until May 16 at 12:15AM CDT by NWS La Crosse WI
Nearby, since 14 April 2026
- June 18, 2026 · score 22 · 8.3 km
- June 10, 2026 · score 46 · 19.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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 | 61% |
| Coordinates | 42.9864, -90.3855 |
| Nearest City | Dubuque (59 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-16T04:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.83940fdea121d3b3cba7191a07fd113b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grant, WI; Iowa, WI; Lafayette, WI |
| Headline | Severe Thunderstorm Warning issued May 15 at 11:55PM CDT until May 16 at 12:15AM CDT by NWS La Crosse WI |
| Expires | 2026-05-16T00:15:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.83940fdea121d3b3cba7191a07fd113b63c1be53.001.1","noaa_urn:oid:2.49.0.1.840.0.5d78d3e350646eace80207ce531cb5523e501acf.001.1"] |
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.