Right now
The most recent data we hold from NOAA arrived 4 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 05:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 153 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 16 at 9:22PM CDT until May 17 at 12:15AM CDT by NWS Omaha/Valley NE
Urban PEI: 294,757 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 9, 2026 · score 43 · 21.4 km
How we know
18 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 40.3815, -96.6608 |
| Nearest City | Lincoln (47 km) |
| Urban exposure index (PEI) | 294.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T02:22:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5c1002137f3e1e11e6fef2d5f40fd50e8481d75a.001.1 |
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: 2026-05-17T02:22:00.000Z.
First archived: 2026-05-17T04:07:12.240Z. 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 |
| Headline | Flash Flood Warning issued May 16 at 9:22PM CDT until May 17 at 12:15AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T00:15:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 6 N Western |
| Iem County | Saline |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Report from mPING: Golf Ball (1.75 in.). |
| Google News RssFeed | weather |
| Google News SourceName | KOLN | Nebraska Local News, Weather, Sports | Lincoln, NE |
| MergedSources | [{"id":"iem_H_40.380_-96.930_1778979420000","source":"iem","severity":"low","severityValue":25,"timestamp":1778979420000,"latitude":40.38,"longitude":-96.93},{"id":"iem_H_40.740_-96.930_1778981400000","source":"iem","severity":"low","severityValue":25,"timestamp":1778981400000,"latitude":40.74,"longitude":-96.93},{"id":"iem_H_40.910_-96.870_1778982840000","source":"iem","severity":"low","severityValue":25,"timestamp":1778982840000,"latitude":40.91,"longitude":-96.87},{"id":"iem_H_40.630_-96.940_1778980260000","source":"iem","severity":"low","severityValue":25,"timestamp":1778980260000,"latitude":40.63,"longitude":-96.94},{"id":"iem_H_40.300_-97.060_1778982900000","source":"iem","severity":"low","severityValue":25,"timestamp":1778982900000,"latitude":40.3,"longitude":-97.06},{"id":"iem_H_40.400_-96.920_1778979780000","source":"iem","severity":"low","severityValue":25,"timestamp":1778979780000,"latitude":40.4,"longitude":-96.92},{"id":"iem_H_40.780_-96.930_1778981700000","source":"iem","severity":"low","severityValue":25,"timestamp":1778981700000,"latitude":40.78,"longitude":-96.93},{"id":"iem_H_40.300_-97.060_1778977140000","source":"iem","severity":"low","severityValue":25,"timestamp":1778977140000,"latitude":40.3,"longitude":-97.06},{"id":"iem_H_40.790_-96.930_1778981760000","source":"iem","severity":"low","severityValue":25,"timestamp":1778981760000,"latitude":40.79,"longitude":-96.93},{"id":"iem_H_40.300_-97.080_1778982960000","source":"iem","severity":"low","severityValue":25,"timestamp":1778982960000,"latitude":40.3,"longitude":-97.08},{"id":"iem_H_40.390_-96.880_1778981220000","source":"iem","severity":"low","severityValue":25,"timestamp":1778981220000,"latitude":40.39,"longitude":-96.88},{"id":"iem_H_40.620_-96.950_1778980500000","source":"iem","severity":"low","severityValue":25,"timestamp":1778980500000,"latitude":40.62,"longitude":-96.95},{"id":"iem_H_40.910_-96.870_1778983080000","source":"iem","severity":"low","severityValue":25,"timestamp":1778983080000,"latitude":40.91,"longitude":-96.87},{"id":"iem_H_40.480_-96.960_1778979000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778979000000,"latitude":40.48,"longitude":-96.96},{"id":"iem_H_40.480_-97.210_1778986020000","source":"iem","severity":"low","severityValue":25,"timestamp":1778986020000,"latitude":40.48,"longitude":-97.21},{"id":"gnews_weather_494157_157","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778965680000,"latitude":40.8,"longitude":-96.67},{"id":"gnews_weather_494158_164","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778971504000,"latitude":40.8,"longitude":-96.67}] |
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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