This alert expired on 2 July 2026 at 06:45 UTC. It is kept here as a record.
No stronger detection stands among the 95 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. 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: Flash Flood Warning issued July 1 at 11:20PM CDT until July 2 at 1:45AM CDT by NWS Green Bay WI
An estimated 381,586 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 1, 2026 · score 43 · 17.1 km
- June 10, 2026 · score 37 · 22.1 km
- July 8, 2026 · score 43 · 22.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 79 % 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 | 79% |
| Coordinates | 44.2433, -88.4567 |
| Nearest City | Appleton (3 km) |
| Population Exposed | 381.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T04:20:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.483b0343dc2234f6d94cc7fef785d7499c9919b3.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Brown, WI; Calumet, WI; Outagamie, WI; Winnebago, WI |
| Headline | Flash Flood Warning issued July 1 at 11:20PM CDT until July 2 at 1:45AM CDT by NWS Green Bay WI |
| Expires | 2026-07-02T01:45:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 Appleton?
Calamity.live data shows a weather event with CalamityScore 43/100, near Appleton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.