This alert expired on 21 July 2026 at 01:15 UTC. It is kept here as a record.
No stronger detection stands among the 106 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. 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: Tornado Warning issued July 20 at 8:01PM CDT until July 20 at 8:15PM CDT by NWS Green Bay WI
An estimated 117,284 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 30, 2026 · score 43 · 4.2 km
- May 27, 2026 · score 43 · 9.5 km
- August 12, 2026 · score 39 · 12.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 67 out of 100, at 80 % 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 | Critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 80% |
| Coordinates | 44.7800, -89.5576 |
| Nearest City | Weston (12 km) |
| Population Exposed | 117.3K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-07-21T01:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.6d82159dc93b6e7207336e9e93afac23 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marathon, WI; Menominee, WI; Shawano, WI; Wood, WI and 2 more areas |
| Headline | Tornado Warning issued July 20 at 8:01PM CDT until July 20 at 8:15PM CDT by NWS Green Bay WI |
| Expires | 2026-07-20T20:15:00-05:00 |
| SenderName | NWS Green Bay WI |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6d82159dc93b6e7207336e9e93afac235ac71779.001.1","noaa_urn:oid:2.49.0.1.840.0.eb962ab89cb826b5d0e4e526ec3e786c511e3ba7.002.1","noaa_urn:oid:2.49.0.1.840.0.ff54690d6832b31d6c2682282fed5ce626c3e563.001.1","noaa_urn:oid:2.49.0.1.840.0.8505a61fed184828fb1bf9e4eec815935c4e2659.001.1","noaa_urn:oid:2.49.0.1.840.0.933d47f1fb902cbab32633f6e7d72f00a45d808d.001.1","noaa_urn:oid:2.49.0.1.840.0.1591bf438442d4ac2e376a53bd3707b3dc5ffe92.001.1"] |
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 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 67/100, near Weston (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.