Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, 24 km from here.
This alert expired on 1 June 2026 at 07:35 UTC. It is kept here as a record.
No stronger detection stands among the 40 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 1 at 2:25AM CDT until June 1 at 2:30AM CDT by NWS Topeka KS
An estimated 24,649 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 4, 2026 · score 34 · 20.4 km
How we know
Confirmed by 19 independent sources, including NOAA.
Our own score for this event is 40 out of 100, at 90 % 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 | High |
| Calamity Score (ours) | 40 / 100 |
| Our confidence | 90% |
| Coordinates | 38.4223, -95.7461 |
| Nearest City | Emporia (38 km) |
| Population Exposed | 24.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-01T07:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.89af638a98a3aebcc00c1dc4febdbf38 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lyon, KS; Coffey, KS; Wyandotte, KS; Clay, MO; Platte, MO and 1 more areas |
| Headline | Flash Flood Warning issued June 1 at 2:25AM CDT until June 1 at 2:30AM CDT by NWS Topeka KS |
| Expires | 2026-06-01T02:35:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.89af638a98a3aebcc00c1dc4febdbf3858e6a2e8.001.1","noaa_urn:oid:2.49.0.1.840.0.cd08be4aa402806253992e7f84335c07c099ee9e.001.1","noaa_urn:oid:2.49.0.1.840.0.d2900bb2fa80df01a63511f25f9cb887a92d3621.001.1","noaa_urn:oid:2.49.0.1.840.0.460e9d4e196f6540a5a5babcece2ab52f429946d.001.1","noaa_urn:oid:2.49.0.1.840.0.e5a0cfbfb69fb13d10b5f7adccdd5af09872127f.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | 6 W Le Roy |
| Spc County | Coffey |
| Spc State | KS |
| Spc Comments | Report from mPING: Golf Ball (1.75 in.). (TOP) |
| Iem TypeSummary | H |
| Iem Magnitude | 2.5 |
| Iem Unit | Inch |
| Iem City | Gridley |
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?