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 06:30 UTC. It is kept here as a record.
It is the 5th strongest of the 112 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 16 at 12:55AM CDT until May 16 at 1:30AM CDT by NWS Milwaukee/Sullivan WI
An estimated 423,768 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 18, 2026 · score 43 · 9.4 km
- May 17, 2026 · score 67 · 18.7 km
- May 17, 2026 · score 67 · 19.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 42.9500, -89.4750 |
| Nearest City | Fitchburg (1 km) |
| Population Exposed | 423.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-16T05:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.7710d31eadb682a6402ff99df4a96ffaad496e8d.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dane, WI; Green, WI; Rock, WI |
| Headline | Severe Thunderstorm Warning issued May 16 at 12:55AM CDT until May 16 at 1:30AM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-05-16T01:30:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 1 ENE Dodgeville |
| Iem County | Iowa |
| Iem State | WI |
| Iem Wfo | MKX |
| Iem Remark | Corrects previous non-tstm wnd gst report from 1 ENE Dodgeville. Mesonet station AP090 Madison. |
| MergedSources | [{"id":"iem_N_42.970_-90.120_1778909760000","source":"iem","severity":"low","severityValue":25,"timestamp":1778909760000,"latitude":42.97,"longitude":-90.12},{"id":"iem_G_42.970_-90.120_1778909760000","source":"iem","severity":"low","severityValue":25,"timestamp":1778909760000,"latitude":42.97,"longitude":-90.12}] |
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 near Fitchburg?
Calamity.live data shows a weather event with CalamityScore 43/100, near Fitchburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.