This alert expired on 22 May 2026 at 03:30 UTC. It is kept here as a record.
It is the 30th strongest of the 87 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day. 33 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued May 20 at 10:30AM CDT until May 25 at 3:00AM CDT by NWS St Louis MO
Nearby, since 4 April 2026
- June 23, 2026 · score 43 · 10.3 km
- May 18, 2026 · score 22 · 13.4 km
- June 18, 2026 · score 43 · 13.9 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 62 % 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 | 62% |
| Coordinates | 39.0585, -91.7057 |
| Nearest City | Columbia (55 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T18:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.b9b5caa5456476ffe2f16fc632f97310 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Gasconade, MO; Montgomery, MO; Chariton, MO; Howard, MO; Saline, MO; Carroll, MO; Chariton, MO; Saline, MO and 33 more areas |
| Headline | Flood Warning issued May 20 at 10:30AM CDT until May 25 at 3:00AM CDT by NWS St Louis MO |
| Expires | 2026-05-21T22:30:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 40 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b9b5caa5456476ffe2f16fc632f97310a14a1638.001.1","noaa_urn:oid:2.49.0.1.840.0.59030682c609e0ef1eea95bf6f66d418689586bb.005.1","noaa_urn:oid:2.49.0.1.840.0.59030682c609e0ef1eea95bf6f66d418689586bb.004.1","noaa_urn:oid:2.49.0.1.840.0.59030682c609e0ef1eea95bf6f66d418689586bb.002.1","noaa_urn:oid:2.49.0.1.840.0.59030682c609e0ef1eea95bf6f66d418689586bb.001.1","noaa_urn:oid:2.49.0.1.840.0.59030682c609e0ef1eea95bf6f66d418689586bb.003.1","noaa_urn:oid:2.49.0.1.840.0.a7f527bc079e695d0cb6b9d590705a6de97c5d10.005.1","noaa_urn:oid:2.49.0.1.840.0.a7f527bc079e695d0cb6b9d590705a6de97c5d10.001.1","noaa_urn:oid:2.49.0.1.840.0.a7f527bc079e695d0cb6b9d590705a6de97c5d10.003.1","noaa_urn:oid:2.49.0.1.840.0.a7f527bc079e695d0cb6b9d590705a6de97c5d10.004.1","noaa_urn:oid:2.49.0.1.840.0.a7f527bc079e695d0cb6b9d590705a6de97c5d10.002.1","noaa_urn:oid:2.49.0.1.840.0.bb9a5205a2eb34f619aa6e8852df598eb07a0878.001.1","noaa_urn:oid:2.49.0.1.840.0.285227f5598727227cd2e1dfb4114e27859a4004.001.1","noaa_urn:oid:2.49.0.1.840.0.0cfbe74f43bf96e8434d70bd32597e80978507f9.001.1","noaa_urn:oid:2.49.0.1.840.0.bed9b5b508b2b37416a593decec2d87f36bbc6d3.002.1","noaa_urn:oid:2.49.0.1.840.0.bed9b5b508b2b37416a593decec2d87f36bbc6d3.001.1","noaa_urn:oid:2.49.0.1.840.0.5680dee3e366175c42bbc8efefc4fe8bf0d8f89c.001.1","noaa_urn:oid:2.49.0.1.840.0.5680dee3e366175c42bbc8efefc4fe8bf0d8f89c.002.1","noaa_urn:oid:2.49.0.1.840.0.1d9540202982a04aa904859c8aa08f42af9c451d.001.1","noaa_urn:oid:2.49.0.1.840.0.8ff8bb36d523a7db4c0223a80374170006ba1d78.001.1","noaa_urn:oid:2.49.0.1.840.0.ceb55599647363183fd7f9c98b460d54067cf61d.001.1","noaa_urn:oid:2.49.0.1.840.0.ceb55599647363183fd7f9c98b460d54067cf61d.002.1","noaa_urn:oid:2.49.0.1.840.0.905df4758e94f9fded650802649fc60814adb84c.001.1","noaa_urn:oid:2.49.0.1.840.0.905df4758e94f9fded650802649fc60814adb84c.002.1","noaa_urn:oid:2.49.0.1.840.0.a41c993511d423cc924bcaa39109172301aaf1ca.001.1","noaa_urn:oid:2.49.0.1.840.0.cd41177fee452f24ae22874be177d585196c718d.001.1","noaa_urn:oid:2.49.0.1.840.0.5449b166a5ee1ec778baeafd70343a9ed8951778.001.1","noaa_urn:oid:2.49.0.1.840.0.f51a81957426bf7f674459a51c42cdad4c0d10e8.001.1","noaa_urn:oid:2.49.0.1.840.0.42116fd0dfcdb83552d5298781356bf322ee1738.001.1","noaa_urn:oid:2.49.0.1.840.0.1fbff4a434ae70f134160050218e065f86cf857a.001.1","noaa_urn:oid:2.49.0.1.840.0.d27e94a437359a5e5d54f0311320eb1bc8af150a.001.1","noaa_urn:oid:2.49.0.1.840.0.76fd26afe722f8eba68b68124cf5127a744d68db.001.1","noaa_urn:oid:2.49.0.1.840.0.572ea39e15acf4e2c9316b725dee0c5c6f6afa8b.001.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.007.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.003.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.002.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.005.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.004.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.001.1","noaa_urn:oid:2.49.0.1.840.0.8a698cfca50628911105d350e8343000c5ae5c21.008.1"] |
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.