This alert expired on 24 June 2026 at 22:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 41 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 4:59PM CDT until June 24 at 5:45PM CDT by NWS Green Bay WI
An estimated 199,912 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 16, 2026 · score 43 · 13.1 km
- June 10, 2026 · score 37 · 13.7 km
- July 8, 2026 · score 43 · 17.5 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 87 % 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 | 87% |
| Coordinates | 44.4230, -88.8133 |
| Nearest City | Appleton (36 km) |
| Population Exposed | 199.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-24T21:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ef27930c29841fbb70124fee4fe7dae4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Waushara, WI; Oconto, WI; Shawano, WI |
| Headline | Severe Thunderstorm Warning issued June 24 at 4:59PM CDT until June 24 at 5:45PM CDT by NWS Green Bay WI |
| Expires | 2026-06-24T17:45:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ef27930c29841fbb70124fee4fe7dae4271bb30b.001.1","noaa_urn:oid:2.49.0.1.840.0.0d207140f75fd1ebd4f401890ce6420addd1b12b.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 1 S Ashwaubenon |
| Iem County | Brown |
| Iem State | WI |
| Iem Wfo | GRB |
| Iem Remark | Report via social media. |
| MergedSources | [{"id":"iem_H_44.460_-88.030_1782331980000","source":"iem","severity":"low","severityValue":25,"timestamp":1782331980000,"latitude":44.46,"longitude":-88.03},{"id":"iem_R_44.540_-88.250_1782331200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782331200000,"latitude":44.54,"longitude":-88.25},{"id":"iem_H_44.490_-88.090_1782331620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782331620000,"latitude":44.49,"longitude":-88.09},{"id":"iem_H_44.460_-88.070_1782332220000","source":"iem","severity":"low","severityValue":25,"timestamp":1782332220000,"latitude":44.46,"longitude":-88.07}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.