Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
6 other detections within 20 km in the last 24 hours, the nearest 15 km from here.
This alert expired on 5 September 2026 at 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 97 recorded within 20 km of this point since 15 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Tornado Warning issued September 4 at 6:38PM CDT until September 4 at 7:00PM CDT by NWS La Crosse WI
An estimated 18,620 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 5, 2026 · score 32 · 20.1 km
- June 24, 2026 · score 39 · 24.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 81 % 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 | Critical |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 81% |
| Coordinates | 44.6180, -90.3880 |
| Nearest City | Marshfield (18 km) |
| Population Exposed | 18.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-04T23:38:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.378fc2284ef1fc1132a9cbe00094ea20f5ac7100.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clark, WI |
| Headline | Tornado Warning issued September 4 at 6:38PM CDT until September 4 at 7:00PM CDT by NWS La Crosse WI |
| Expires | 2026-09-04T19:00:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
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 Marshfield?
Calamity.live data shows a weather event with CalamityScore 58/100, near Marshfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.