This alert expired on 11 August 2026 at 22:00 UTC. It is kept here as a record.
It is the strongest of the 53 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 11 at 5:37PM EDT until August 11 at 6:00PM EDT by NWS Indianapolis IN
An estimated 108,957 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 13, 2026 · score 43 · 6.8 km
- July 28, 2026 · score 34 · 8.6 km
- June 10, 2026 · score 39 · 10.8 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 67 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 91% |
| Coordinates | 39.8980, -87.2980 |
| Nearest City | Danville (38 km) |
| Population Exposed | 109.0K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-11T21:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.99aedbcaac9bd2e001141aedbdd5cdf060f3c6a1.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fountain, IN; Parke, IN; Vermillion, IN |
| Headline | Tornado Warning issued August 11 at 5:37PM EDT until August 11 at 6:00PM EDT by NWS Indianapolis IN |
| Expires | 2026-08-11T18:00:00-04:00 |
| SenderName | NWS Indianapolis IN |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | 1 NW Darlington |
| Iem County | Montgomery |
| Iem State | IN |
| Iem Wfo | IND |
| MergedSources | [{"id":"iem_H_40.120_-86.800_1786479240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786479240000,"latitude":40.12,"longitude":-86.8},{"id":"iem_G_40.410_-86.940_1786469580000","source":"iem","severity":"low","severityValue":25,"timestamp":1786469580000,"latitude":40.41,"longitude":-86.94},{"id":"iem_H_40.120_-86.800_1786480200000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480200000,"latitude":40.12,"longitude":-86.8},{"id":"iem_H_39.990_-87.150_1786481580000","source":"iem","severity":"low","severityValue":25,"timestamp":1786481580000,"latitude":39.99,"longitude":-87.15},{"id":"iem_H_40.120_-86.800_1786478820000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478820000,"latitude":40.12,"longitude":-86.8}] |
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 10 February 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 in this area?
Calamity.live data shows a weather event with CalamityScore 67/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.