This alert expired on 6 June 2026 at 03:30 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. 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: Tornado Warning issued June 5 at 10:12PM CDT until June 5 at 10:30PM CDT by NWS Milwaukee/Sullivan WI
An estimated 376,209 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 9, 2026 · score 43 · 7.9 km
- May 28, 2026 · score 39 · 25.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 81% |
| Coordinates | 43.3745, -89.3418 |
| Nearest City | Sun Prairie (24 km) |
| Population Exposed | 376.2K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-06T03:12:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.13206249a0acc2545d65df6d2b3ed6133675f179.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Columbia, WI |
| Headline | Tornado Warning issued June 5 at 10:12PM CDT until June 5 at 10:30PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-06-05T22:30:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
Series begins 10 February 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 Sun Prairie?
Calamity.live data shows a weather event with CalamityScore 67/100, near Sun Prairie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.