This alert expired on 11 May 2026 at 14:15 UTC. It is kept here as a record.
It is the 65th strongest of the 146 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 9 May 2026. 25 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 9 at 9:10PM CDT by NWS St Louis MO
Nearby, since 16 March 2026
- June 27, 2026 · score 22 · 10.7 km
- June 28, 2026 · score 22 · 10.7 km
- May 9, 2026 · score 22 · 13.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % 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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 38.9317, -88.1419 |
| Nearest City | Vincennes (60 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-10T12:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.261248f1296a256fd0fd70beb6ad468b |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, IL; Clay, IL; Richland, IL; Lawrence, IN; Martin, IN and 6 more areas |
| Headline | Flood Warning issued May 9 at 9:10PM CDT by NWS St Louis MO |
| Expires | 2026-05-11T09:15:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.261248f1296a256fd0fd70beb6ad468bc89435a1.001.1","noaa_urn:oid:2.49.0.1.840.0.057a7e18a04361c8476eaf0840558b833e06e67f.001.1","noaa_urn:oid:2.49.0.1.840.0.2d82ff11f150ff656003e7df8f816f910ffbfa92.001.1","noaa_urn:oid:2.49.0.1.840.0.6fe2f92ea88d95316ef383f3534a8b5c367e6267.002.1","noaa_urn:oid:2.49.0.1.840.0.6fe2f92ea88d95316ef383f3534a8b5c367e6267.003.1","noaa_urn:oid:2.49.0.1.840.0.6fe2f92ea88d95316ef383f3534a8b5c367e6267.004.1","noaa_urn:oid:2.49.0.1.840.0.6fe2f92ea88d95316ef383f3534a8b5c367e6267.001.1","noaa_urn:oid:2.49.0.1.840.0.2fcced4bfac0c47444536cb7a7fb85efe512736e.002.1","noaa_urn:oid:2.49.0.1.840.0.2fcced4bfac0c47444536cb7a7fb85efe512736e.001.1","noaa_urn:oid:2.49.0.1.840.0.fb650fa5cfc2937ec30827e2826d98f046022196.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
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Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.