Right now
The most recent data we hold from NOAA arrived 2 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 12 June 2026 at 00:45 UTC. It is kept here as a record.
It is the 16th strongest of the 27 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 11 at 6:01PM CDT until June 11 at 7:45PM CDT by NWS St Louis MO
Urban PEI: 295,979 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- June 11, 2026 · score 37 · 0.0 km
- July 8, 2026 · score 43 · 4.6 km
- July 8, 2026 · score 43 · 8.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 37 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 41.2000, -90.6856 |
| Nearest City | Rock Island (36 km) |
| Urban exposure index (PEI) | 296.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T23:01:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.e88a82d9ca7ed9b0efb0955763416b1c |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-11T23:01:00.000Z.
First archived: 2026-06-11T23:06:36.082Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Shelby, MO; Fulton, IL; Peoria, IL; Lewis, MO; Marion, MO and 10 more areas |
| Headline | Flash Flood Warning issued June 11 at 6:01PM CDT until June 11 at 7:45PM CDT by NWS St Louis MO |
| Expires | 2026-06-11T19:45:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e88a82d9ca7ed9b0efb0955763416b1c25c876ee.001.1","noaa_urn:oid:2.49.0.1.840.0.790056c48af4a3e9c543e94649daa2e7dd71c55b.001.1","noaa_urn:oid:2.49.0.1.840.0.a89105e1ffc4bec68624d9ff636c7843eba5d427.001.1","noaa_urn:oid:2.49.0.1.840.0.a5ac39e6dfc7fce3b02d414b295b665cab4169f9.001.1","noaa_urn:oid:2.49.0.1.840.0.9f34d223afb0199fd5ab174752b730f6a84e1dc6.001.1","noaa_urn:oid:2.49.0.1.840.0.ad544e78892711e9f60350496576a9da43d62340.001.1","noaa_urn:oid:2.49.0.1.840.0.2a35c143636a22315ed06ba2ed8a77d823179e63.001.1","noaa_urn:oid:2.49.0.1.840.0.0189287c5e480448184f603f9e1493b36edbd697.001.1","noaa_urn:oid:2.49.0.1.840.0.6c7f01f04b92ddb6006f52b989ac29c2cfcc7b3d.001.1","noaa_urn:oid:2.49.0.1.840.0.a2d1f1bc6b133b576add9c2a7e0112fe1c600ad0.001.1","noaa_urn:oid:2.49.0.1.840.0.57dd150d31602cbcc58b2318b819a6642fa46447.001.1","noaa_urn:oid:2.49.0.1.840.0.34d82db87d8d9af79e4d2cead0bd91127e2d7a87.001.1","noaa_urn:oid:2.49.0.1.840.0.41ce8c0edda1cadc161ae48ef860beeb125582b1.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?