Right now
The most recent data we hold from NOAA arrived 29 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 May 2026 at 06:45 UTC. It is kept here as a record.
It is the 10th strongest of the 35 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 17 at 12:04AM CDT until May 17 at 1:45AM CDT by NWS Omaha/Valley NE
Nearby, since 15 March 2026
- August 10, 2026 · score 22 · 12.7 km
- September 1, 2026 · score 16 · 14.4 km
- May 17, 2026 · score 22 · 14.5 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 40.3250, -95.5144 |
| Nearest City | Saint Joseph (84 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-17T05:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.9d6068d2ac916938f8b929f5c9a45f7a |
Physical priority index · v1. 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: 2026-05-17T05:04:00.000Z.
First archived: 2026-05-17T05:08:39.166Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Gage, NE; Saline, NE; Gage, NE; Johnson, NE; Otoe, NE and 5 more areas |
| Headline | Flash Flood Warning issued May 17 at 12:04AM CDT until May 17 at 1:45AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T01:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9d6068d2ac916938f8b929f5c9a45f7a62e94e60.001.1","noaa_urn:oid:2.49.0.1.840.0.4db3f418fb2e52af230cb1d28014c94396835f06.001.1","noaa_urn:oid:2.49.0.1.840.0.aa5b94b07379a1b62976cb5f449c22f1b50b1b32.001.1","noaa_urn:oid:2.49.0.1.840.0.22b95fc5eedf6a449ffccd48ec66106f42e5f7b9.001.1","noaa_urn:oid:2.49.0.1.840.0.3e6eb56703da1210cb9390bb3aae3dc440a1b5ae.001.1","noaa_urn:oid:2.49.0.1.840.0.f4d525dfe4ffecae5276887cda6ea4b1f724e2b0.001.1","noaa_urn:oid:2.49.0.1.840.0.24555793b3a1ba8cc09263b5206952b754bbeef2.001.1","noaa_urn:oid:2.49.0.1.840.0.4e78f34e54504056a99e3f92a93e5ffe3ce94ca6.001.1"] |
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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