This alert expired on 2 July 2026 at 23:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 76 detections recorded within 20 km of this point since 16 March 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 July 2 at 6:23PM CDT until July 2 at 6:45PM CDT by NWS Milwaukee/Sullivan WI
An estimated 447,587 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 16, 2026 · score 43 · 12.8 km
- June 24, 2026 · score 43 · 13.8 km
- June 10, 2026 · score 43 · 15.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 88% |
| Coordinates | 42.9769, -89.1408 |
| Nearest City | Sun Prairie (23 km) |
| Population Exposed | 447.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T23:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8dffe1c7c1ec36927a789319db5204c3 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dane, WI; Dane, WI; Dodge, WI; Jefferson, WI; Green, WI; Rock, WI |
| Headline | Severe Thunderstorm Warning issued July 2 at 6:23PM CDT until July 2 at 6:45PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-07-02T18:45:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8dffe1c7c1ec36927a789319db5204c388a773c4.001.1","noaa_urn:oid:2.49.0.1.840.0.81a7dc4843383f5e9592239ecdc9bb7e62f26c7a.001.1","noaa_urn:oid:2.49.0.1.840.0.fd554a260c93f15a4baada08b68336e4cb4e3208.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | Belleville |
| Iem County | Dane |
| Iem State | WI |
| Iem Wfo | MKX |
| Iem Remark | Public estimates 60 MPH gusts. Time confirmed from radar. |
| MergedSources | [{"id":"iem_G_43.190_-89.310_1783032900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032900000,"latitude":43.19,"longitude":-89.31},{"id":"iem_G_42.870_-89.540_1783032780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783032780000,"latitude":42.87,"longitude":-89.54}] |
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 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 43/100, near Sun Prairie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.