Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
28 other detections within 20 km in the last 24 hours, the nearest 2 km from here.
This alert expired on 1 October 2026 at 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 32 recorded within 20 km of this point since 15 March 2026 — 3 others scored the same. The last comparable one was on 14 September 2026.
What the source measured
NOAA reported: Flash Flood Warning issued September 30 at 8:41PM CDT until September 30 at 11:45PM CDT by NWS Omaha/Valley NE
Urban PEI: 294,757 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 2, 2026 · 11.7 km
- April 23, 2026 · 17.4 km
- May 14, 2026 · 20.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 40.7525, -96.8419 |
| Nearest City | Lincoln (15 km) |
| Urban exposure index (PEI) | 294.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-10-01T01:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.4550aff556ac414abccf9ce34a5c38a058562f2d.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: 2026-10-01T01:41:00.000Z.
First archived: 2026-10-01T01:48:03.002Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
1 retained revision 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:2.49.0.1.840.0.4550aff556ac414abccf9ce34a5c38a058562f2d.001.1 |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Lancaster, NE; Saline, NE; Seward, NE |
| Headline | Flash Flood Warning issued September 30 at 8:41PM CDT until September 30 at 11:45PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-09-30T23:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Iem TypeSummary | Heavy rain |
| Iem LsrCode | R |
| Iem LsrType | RAIN |
| Iem Magnitude | 4.32 |
| Iem Unit | Inch |
| Iem City | Geneva |
| Iem County | Fillmore |
| Iem State | NE |
| Iem Wfo | GID |
| MergedSources | [{"id":"iem_R_40.630_-97.710_1790819040000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819040000,"latitude":40.63,"longitude":-97.71},{"id":"iem_R_40.650_-97.450_1790819280000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819280000,"latitude":40.65,"longitude":-97.45},{"id":"iem_R_40.520_-97.590_1790819280000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819280000,"latitude":40.52,"longitude":-97.59},{"id":"iem_R_40.540_-97.580_1790819280000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819280000,"latitude":40.54,"longitude":-97.58},{"id":"iem_R_40.530_-97.610_1790819220000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819220000,"latitude":40.53,"longitude":-97.61},{"id":"iem_R_40.600_-97.700_1790818560000","source":"iem","severity":"low","severityValue":25,"timestamp":1790818560000,"latitude":40.6,"longitude":-97.7},{"id":"iem_R_40.840_-97.480_1790820000000","source":"iem","severity":"low","severityValue":25,"timestamp":1790820000000,"latitude":40.84,"longitude":-97.48},{"id":"iem_R_40.580_-97.550_1790818980000","source":"iem","severity":"low","severityValue":25,"timestamp":1790818980000,"latitude":40.58,"longitude":-97.55},{"id":"iem_R_40.590_-97.570_1790819100000","source":"iem","severity":"low","severityValue":25,"timestamp":1790819100000,"latitude":40.59,"longitude":-97.57},{"id":"iem_R_40.720_-97.470_1790820000000","source":"iem","severity":"low","severityValue":25,"timestamp":1790820000000,"latitude":40.72,"longitude":-97.47},{"id":"iem_R_40.530_-97.600_1790818800000","source":"iem","severity":"low","severityValue":25,"timestamp":1790818800000,"latitude":40.53,"longitude":-97.6}] |
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.
Review the area, threshold and delivery channel in your account.
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