This alert expired on 24 June 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 39 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 24 at 5:45PM CDT until June 24 at 6:15PM CDT by NWS Milwaukee/Sullivan WI
An estimated 151,844 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 16, 2026 · score 43 · 19.1 km
- July 1, 2026 · score 34 · 21.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 67 out of 100, at 83 % 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 | 83% |
| Coordinates | 43.8625, -88.8862 |
| Nearest City | Oshkosh (33 km) |
| Population Exposed | 151.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-24T22:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5a7b143e91d2d95fb5dc0ee13eabe0d05ad544ab.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fond du Lac, WI; Green Lake, WI |
| Headline | Tornado Warning issued June 24 at 5:45PM CDT until June 24 at 6:15PM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-06-24T18:15:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.25 |
| Iem Unit | Inch |
| Iem City | 1 SW Wild Rose |
| Iem County | Waushara |
| Iem State | WI |
| Iem Wfo | GRB |
| Iem Remark | Report from mPING: Half Dollar (1.25 in.). |
| MergedSources | [{"id":"iem_H_44.160_-89.260_1782338160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782338160000,"latitude":44.16,"longitude":-89.26}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 67/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.