This alert expired on 11 August 2026 at 23:30 UTC. It is kept here as a record.
It is the 10th strongest of the 24 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 27 June 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 6:55PM EDT until August 11 at 7:30PM EDT by NWS Indianapolis IN
An estimated 18,012 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 18, 2026 · score 40 · 13.0 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % 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) | 34 / 100 |
| Our confidence | 90% |
| Coordinates | 38.9707, -87.1375 |
| Nearest City | Vincennes (47 km) |
| Population Exposed | 18.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T22:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ed749705b3d5f671fe07a186d20292d3 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bartholomew, IN; Brown, IN; Daviess, IN; Decatur, IN; Greene, IN; Jackson, IN; Jennings, IN; Johnson, IN; Lawrence, IN; Martin, IN; Monroe, IN; Shelby, IN; Clark, IL; Daviess, IN; Greene, IN; Knox, IN; Lawrence, IN; Martin, IN; Sullivan, IN |
| Headline | Severe Thunderstorm Warning issued August 11 at 6:55PM EDT until August 11 at 7:30PM EDT by NWS Indianapolis IN |
| Expires | 2026-08-11T19:30:00-04:00 |
| SenderName | NWS Indianapolis IN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ed749705b3d5f671fe07a186d20292d3c22b508e.001.1","noaa_urn:oid:2.49.0.1.840.0.76377524caed727a35df0da1a0594976e3449a28.001.1","noaa_urn:oid:2.49.0.1.840.0.e49ae6a3ccefb1611b430f87dc424aa03f25b145.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 1 SE Terre Haute |
| Iem County | Vigo |
| Iem State | IN |
| Iem Wfo | IND |
| Iem Remark | Report from mPING: Dime (0.75 in.). |
| MergedSources | [{"id":"iem_H_39.430_-87.410_1786485900000","source":"iem","severity":"low","severityValue":25,"timestamp":1786485900000,"latitude":39.43,"longitude":-87.41},{"id":"iem_E_39.460_-87.380_1786484460000","source":"iem","severity":"low","severityValue":25,"timestamp":1786484460000,"latitude":39.46,"longitude":-87.38},{"id":"iem_G_39.510_-87.460_1786484940000","source":"iem","severity":"low","severityValue":25,"timestamp":1786484940000,"latitude":39.51,"longitude":-87.46},{"id":"iem_H_39.550_-87.370_1786485780000","source":"iem","severity":"low","severityValue":25,"timestamp":1786485780000,"latitude":39.55,"longitude":-87.37},{"id":"iem_H_39.510_-87.460_1786485420000","source":"iem","severity":"low","severityValue":25,"timestamp":1786485420000,"latitude":39.51,"longitude":-87.46},{"id":"iem_H_39.460_-87.370_1786486020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786486020000,"latitude":39.46,"longitude":-87.37}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.