Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
This alert expired on 5 June 2026 at 02:30 UTC. It is kept here as a record.
It is the 7th strongest of the 27 detections recorded within 20 km of this point since 23 April 2026. The last comparable one was on 4 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 4 at 7:36PM CDT until June 4 at 9:30PM CDT by NWS Omaha/Valley NE
Nearby, since 23 April 2026
- June 5, 2026 · score 22 · 0.0 km
- June 4, 2026 · score 22 · 0.0 km
- September 12, 2026 · score 28 · 5.5 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 | 40.0567, -96.1065 |
| Nearest City | Lincoln (95 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-05T00:36:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.b2e2e0b0c345bb9859f1fde7cb8e5ccd |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Fremont, IA; Montgomery, IA; Page, IA; Clay, KS; Pottawatomie, KS; Riley, KS |
| Headline | Flash Flood Warning issued June 4 at 7:36PM CDT until June 4 at 9:30PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-04T21:30:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b2e2e0b0c345bb9859f1fde7cb8e5ccd6e9974a0.001.1","noaa_urn:oid:2.49.0.1.840.0.b25cb52e1ac6411429a87e31ef1566dc6983e43e.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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