This alert expired on 30 June 2026 at 21:15 UTC. It is kept here as a record.
It is the 9th strongest of the 111 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 4:06PM CDT until June 30 at 4:15PM CDT by NWS Green Bay WI
An estimated 117,284 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 21, 2026 · score 67 · 4.2 km
- May 27, 2026 · score 43 · 7.8 km
- August 12, 2026 · score 39 · 14.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 83 % 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 | 83% |
| Coordinates | 44.7543, -89.5971 |
| Nearest City | Weston (16 km) |
| Population Exposed | 117.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-30T21:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.f9dfffacdcd9d96c8daf6898b4eae826c9caaa06.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marathon, WI |
| Headline | Severe Thunderstorm Warning issued June 30 at 4:06PM CDT until June 30 at 4:15PM CDT by NWS Green Bay WI |
| Expires | 2026-06-30T16:15:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.25 |
| Iem Unit | Inch |
| Iem City | 1 NW Mosinee |
| Iem County | Marathon |
| Iem State | WI |
| Iem Wfo | GRB |
| MergedSources | [{"id":"iem_H_44.790_-89.710_1782852000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782852000000,"latitude":44.79,"longitude":-89.71}] |
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 Weston?
Calamity.live data shows a weather event with CalamityScore 43/100, near Weston (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.