This alert expired on 4 September 2026 at 06:00 UTC. It is kept here as a record.
It is the 16th strongest of the 88 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 4 at 12:29AM CDT until September 4 at 1:00AM CDT by NWS Milwaukee/Sullivan WI
An estimated 242,845 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 2, 2026 · score 37 · 10.1 km
- September 2, 2026 · score 37 · 13.9 km
- July 1, 2026 · score 43 · 17.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 82% |
| Coordinates | 44.1757, -88.6697 |
| Nearest City | Neenah (17 km) |
| Population Exposed | 242.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T05:29:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.07263569754dd9eafd6a80774fb952f1f95f12eb.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Milwaukee, WI; Ozaukee, WI; Washington, WI; Waukesha, WI; Portage, WI; Waupaca, WI; Menominee, WI; Shawano, WI |
| Headline | Severe Thunderstorm Warning issued September 4 at 12:29AM CDT until September 4 at 1:00AM CDT by NWS Milwaukee/Sullivan WI |
| Expires | 2026-09-04T01:00:00-05:00 |
| SenderName | NWS Milwaukee/Sullivan WI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.07263569754dd9eafd6a80774fb952f1f95f12eb.001.1","noaa_urn:oid:2.49.0.1.840.0.792c1caead1847da43c379bb07e0ae711ae6d701.001.1","noaa_urn:oid:2.49.0.1.840.0.978a6b7e9b4ee57dc57dfe0fbc22113ad77fe88a.001.1"] |
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 Neenah?
Calamity.live data shows a weather event with CalamityScore 37/100, near Neenah (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.