This alert expired on 18 May 2026 at 17:15 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 13 April 2026 — one other scored the same. The last comparable one was on 4 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 11:59AM CDT until May 18 at 12:15PM CDT by NWS Chicago IL
An estimated 116,661 people live within 50 km of this point.
Nearby, since 13 April 2026
- July 27, 2026 · score 22 · 6.1 km
- August 12, 2026 · score 43 · 18.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % 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 | 85% |
| Coordinates | 40.8279, -86.9495 |
| Nearest City | West Lafayette (44 km) |
| Population Exposed | 116.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T16:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b2222bf11cf1d8ff887e76f71165a70a |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Benton, IN; Jasper, IN; Pulaski, IN; Starke, IN; White, IN; Clay, IN; Parke, IN; Vermillion, IN; Vigo, IN and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 18 at 11:59AM CDT until May 18 at 12:15PM CDT by NWS Chicago IL |
| Expires | 2026-05-18T12:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b2222bf11cf1d8ff887e76f71165a70a61ef073f.002.1","noaa_urn:oid:2.49.0.1.840.0.932b8f157362341b0bd3212fc2e0eef8a048ae98.001.1","noaa_urn:oid:2.49.0.1.840.0.e529670273160911557bcb349dad2217d9bbf086.001.1","noaa_urn:oid:2.49.0.1.840.0.2a12f46dbc781cbafa7f360192fcd6ae506918ac.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 55 |
| Iem Unit | MPH |
| Iem City | 1 SSE Sun River Terrace |
| Iem County | Kankakee |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Private weather station KILSAINT69 reported 55 mph gust near Sun River Terrace. |
| MergedSources | [{"id":"iem_G_41.110_-87.730_1779119700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779119700000,"latitude":41.11,"longitude":-87.73}] |
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.