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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 30 June 2026 at 08:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 24 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 30 at 12:02AM CDT until June 30 at 3:00AM CDT by NWS Omaha/Valley NE
How we know
10 recorded sources include NOAA; independence is not established by this count.
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 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) | 28 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 41.8518, -98.1336 |
| Nearest City | Norfolk (62 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-30T05:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.1ece3d38a7b42876fe72a134769762925b9ca4b4.001.1 |
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: 2026-06-30T05:02:00.000Z.
First archived: 2026-06-30T07:46:37.198Z. 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 | Antelope, NE; Boone, NE |
| Headline | Flash Flood Warning issued June 30 at 12:02AM CDT until June 30 at 3:00AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-30T03:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 275 |
| Spc Location | Scotia |
| Spc County | Greeley |
| Spc State | NE |
| Spc Comments | Facebook photo shows roughly baseball size hail. Time estimated from radar. (GID) |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 4 W Elgin |
| Iem County | Antelope |
| Iem State | NE |
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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