This alert expired on 12 August 2026 at 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 88 recorded within 20 km of this point since 11 March 2026 — 15 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: Tornado Warning issued August 12 at 3:45PM EDT until August 12 at 4:30PM EDT by NWS Indianapolis IN
An estimated 33,463 people live within 50 km of this point.
Nearby, since 11 March 2026
- June 27, 2026 · score 34 · 12.8 km
- March 14, 2026 · score 34 · 13.4 km
- March 12, 2026 · score 34 · 16.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 85 % 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) | 58 / 100 |
| Our confidence | 85% |
| Coordinates | 38.5710, -87.2850 |
| Nearest City | Vincennes (24 km) |
| Population Exposed | 33.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T19:45:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2cdf261b7977333dd774fbe6d50544b693d87a23.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Knox, IN |
| Headline | Tornado Warning issued August 12 at 3:45PM EDT until August 12 at 4:30PM EDT by NWS Indianapolis IN |
| Expires | 2026-08-12T16:30:00-04:00 |
| SenderName | NWS Indianapolis IN |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 3 NNW Bruceville |
| Iem County | Knox |
| Iem State | IN |
| Iem Wfo | IND |
| Iem Remark | Possible tornado. Debris in the air and trees blown down. |
| MergedSources | [{"id":"iem_D_38.790_-87.440_1786561500000","source":"iem","severity":"low","severityValue":25,"timestamp":1786561500000,"latitude":38.79,"longitude":-87.44}] |
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 Vincennes?
Calamity.live data shows a weather event with CalamityScore 58/100, near Vincennes (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.