This alert expired on 11 August 2026 at 22:45 UTC. It is kept here as a record.
It is the 7th strongest of the 74 detections recorded within 20 km of this point since 12 March 2026. 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: Severe Thunderstorm Warning issued August 11 at 6:15PM EDT until August 11 at 6:45PM EDT by NWS Indianapolis IN
An estimated 114,657 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 27, 2026 · score 43 · 10.7 km
- June 17, 2026 · score 43 · 11.6 km
- March 12, 2026 · score 43 · 13.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 89 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 89% |
| Coordinates | 39.4027, -86.7875 |
| Nearest City | Bloomington (34 km) |
| Population Exposed | 114.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T22:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a32e46b6d0a08b805b4a516798903b5b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clay, IN; Monroe, IN; Morgan, IN; Owen, IN; Putnam, IN; Clay, IN; Greene, IN; Hendricks, IN; Monroe, IN; Morgan, IN; Owen, IN; Putnam, IN; Sullivan, IN; Vigo, IN |
| Headline | Severe Thunderstorm Warning issued August 11 at 6:15PM EDT until August 11 at 6:45PM EDT by NWS Indianapolis IN |
| Expires | 2026-08-11T18:45:00-04:00 |
| SenderName | NWS Indianapolis IN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a32e46b6d0a08b805b4a516798903b5baeada070.001.1","noaa_urn:oid:2.49.0.1.840.0.faa4b06e34786539b25bdf469738878f23b29cb8.002.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | Clinton |
| Iem County | Vermillion |
| Iem State | IN |
| Iem Wfo | IND |
| MergedSources | [{"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_39.660_-87.400_1786484280000","source":"iem","severity":"low","severityValue":25,"timestamp":1786484280000,"latitude":39.66,"longitude":-87.4}] |
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 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.
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.