This alert expired on 21 June 2026 at 13:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 89 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 9 June 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 21 at 5:56AM CDT until June 21 at 8:30AM CDT by NWS Kansas City/Pleasant Hill MO
An estimated 1,495,829 people live within 50 km of this point.
Nearby, since 10 March 2026
- March 10, 2026 · score 52 · 3.2 km
- July 31, 2026 · score 46 · 4.5 km
- July 10, 2026 · score 52 · 4.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % 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) | 52 / 100 |
| Our confidence | 91% |
| Coordinates | 39.0253, -94.9894 |
| Nearest City | Olathe (22 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T10:56:00.000Z |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Johnson, KS; Leavenworth, KS; Wyandotte, KS; Clay, MO; Platte, MO |
| Headline | Flash Flood Warning issued June 21 at 5:56AM CDT until June 21 at 8:30AM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-06-21T08:30:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 1 NE Lansing |
| Iem County | Leavenworth |
| Iem State | KS |
| Iem Wfo | EAX |
| Iem Remark | State Highway 5 covered with water at 7 Mile Creek. KDOT will be barricading it. |
| Google News RssFeed | weather |
| Google News SourceName | KMBC |
| MergedSources | [{"id":"iem_F_39.260_-94.880_1782038520000","source":"iem","severity":"low","severityValue":25,"timestamp":1782038520000,"latitude":39.26,"longitude":-94.88},{"id":"gnews_weather_495005_109","source":"google_news","severity":"medium","severityValue":40,"timestamp":1782019200000,"latitude":39.1,"longitude":-94.58}] |
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 52/100, near Olathe (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.