This alert expired on 5 June 2026 at 03:15 UTC. It is kept here as a record.
It is the 5th strongest of the 25 detections recorded within 20 km of this point since 23 April 2026. The last comparable one was on 18 May 2026.
What the source measured
NOAA reported: Flash Flood Warning issued June 4 at 6:05PM CDT until June 4 at 10:15PM CDT by NWS Topeka KS
Nearby, since 23 April 2026
- June 5, 2026 · score 22 · 0.0 km
- May 18, 2026 · score 46 · 10.0 km
- May 18, 2026 · score 46 · 18.6 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.
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 | 2026-06-04T23:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.b25cb52e1ac6411429a87e31ef1566dc |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Clay, KS; Pottawatomie, KS; Riley, KS; Fremont, IA; Montgomery, IA; Page, IA |
| Headline | Flash Flood Warning issued June 4 at 6:05PM CDT until June 4 at 10:15PM CDT by NWS Topeka KS |
| Expires | 2026-06-04T22:15:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b25cb52e1ac6411429a87e31ef1566dc6983e43e.001.1","noaa_urn:oid:2.49.0.1.840.0.16afceadf58d8274c9fab9a59792c031b27c65f4.001.1"] |
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 10 February 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.
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 188 scientific monitoring sources.