Right now
The most recent data we hold from NOAA arrived 61 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, 4 km from here.
This alert expired on 1 October 2026 at 22:00 UTC. It is kept here as a record.
It is the 5th strongest of the 9 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued October 1 at 2:41PM CDT until October 1 at 5:00PM CDT by NWS Topeka KS
Urban PEI: 35,980 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- May 19, 2026 · 19.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 39.4689, -95.3936 |
| Nearest City | Leavenworth (44 km) |
| Urban exposure index (PEI) | 36.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-10-01T19:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.757862e805a4e4003567f1a2cd86626d44538cbe.001.1 |
Physical priority index · v5. 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: 2026-10-01T19:41:00.000Z.
First archived: 2026-10-01T19:10:41.272Z. Material modification: 2026-10-01T19:48:56.887Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| MessageId | urn:oid:2.49.0.1.840.0.757862e805a4e4003567f1a2cd86626d44538cbe.001.1 |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Geary, KS; Jackson, KS; Nemaha, KS; Pottawatomie, KS; Riley, KS; Jackson, KS; Shawnee, KS; Wabaunsee, KS; Atchison, KS; Doniphan, KS and 2 more areas |
| Headline | Flash Flood Warning issued October 1 at 2:41PM CDT until October 1 at 5:00PM CDT by NWS Topeka KS |
| Expires | 2026-10-01T17:00:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.03e28a6229aa5b7496896a70cba39218a210843d.001.1","noaa_urn:oid:2.49.0.1.840.0.73f3beed1a6a2cc1e1b4cd790cc05cb285d803ce.001.1","noaa_urn:oid:2.49.0.1.840.0.d621914451f2d396f34cfc735e551b19503624f3.001.1","noaa_urn:oid:2.49.0.1.840.0.e86b0fdf550706b4a19991e25d0cad248bdc23c0.001.1","noaa_urn:oid:2.49.0.1.840.0.cb5e0d8071f78c28c95e1880aa9c4ad301bd5dff.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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