This alert expired on 18 May 2026 at 06:15 UTC. It is kept here as a record.
It is the 4th strongest of the 45 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 17 at 1:04PM CDT until May 22 at 2:58AM CDT by NWS Kansas City/Pleasant Hill MO
Nearby, since 15 March 2026
- June 10, 2026 · score 46 · 8.9 km
- August 9, 2026 · score 22 · 15.6 km
- May 18, 2026 · score 22 · 21.9 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 60 % 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 | 60% |
| Coordinates | 39.9470, -94.1097 |
| Nearest City | Saint Joseph (66 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T19:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.4510728a9660dbe29e37f240b4b6def8 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carroll, MO; Chariton, MO; Linn, MO; Livingston, MO; Daviess, MO; Gentry, MO; Grundy, MO; Harrison, MO; Mercer, MO; Linn, MO; Livingston, MO and 6 more areas |
| Headline | Flood Warning issued May 17 at 1:04PM CDT until May 22 at 2:58AM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-05-18T01:15:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4510728a9660dbe29e37f240b4b6def8ac8a155e.001.1","noaa_urn:oid:2.49.0.1.840.0.36f291c2508c2ba5e7b9a56a198987f63f91dcc0.001.1","noaa_urn:oid:2.49.0.1.840.0.eced032142ec9ae000f18ba70bd92fab8be389f8.001.1","noaa_urn:oid:2.49.0.1.840.0.953c8604ed764a2e40effc0d134d2743b172a6a5.001.1","noaa_urn:oid:2.49.0.1.840.0.dec59fcc1c36f4f64f7eab67f356e78054fbcf89.001.1","noaa_urn:oid:2.49.0.1.840.0.dec59fcc1c36f4f64f7eab67f356e78054fbcf89.003.1","noaa_urn:oid:2.49.0.1.840.0.dec59fcc1c36f4f64f7eab67f356e78054fbcf89.002.1","noaa_urn:oid:2.49.0.1.840.0.97b4858538cb852dc259a0e8978ae16ade22034e.001.1","noaa_urn:oid:2.49.0.1.840.0.97b4858538cb852dc259a0e8978ae16ade22034e.002.1"] |
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.
Want to know when something happens in this area?
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.