Right now
The most recent data we hold from NOAA arrived 22 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 27 June 2026 at 04:00 UTC. It is kept here as a record.
It is the 33rd strongest of the 100 detections recorded within 20 km of this point since 5 May 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 26 at 8:47PM MDT until June 26 at 10:00PM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- June 27, 2026 · score 22 · 0.0 km
- September 6, 2026 · score 28 · 3.9 km
- July 28, 2026 · score 22 · 17.8 km
How we know
10 recorded sources include NOAA; independence is not established by this count.
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 | 0.69/1 |
| Coordinates | 41.6767, -103.0867 |
| Nearest City | Cheyenne (156 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-27T02:47:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5e681b1c8ae3e1ea6834ae528612b626f6170fa5.001.1 |
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: 2026-06-27T02:47:00.000Z.
First archived: 2026-06-27T03:33:27.713Z. 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 | Morrill, NE |
| Headline | Flash Flood Warning issued June 26 at 8:47PM MDT until June 26 at 10:00PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-26T22:00:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | Bridgeport |
| Iem County | Morrill |
| Iem State | NE |
| Iem Wfo | CYS |
| Iem Remark | Social media image showed rain gauge measurement of 1.75 inches. |
| MergedSources | [{"id":"iem_G_41.900_-103.680_1782526620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782526620000,"latitude":41.9,"longitude":-103.68},{"id":"iem_R_41.660_-103.090_1782525360000","source":"iem","severity":"low","severityValue":25,"timestamp":1782525360000,"latitude":41.66,"longitude":-103.09},{"id":"iem_R_41.660_-103.100_1782524700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782524700000,"latitude":41.66,"longitude":-103.1},{"id":"iem_F_41.760_-103.710_1782518100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782518100000,"latitude":41.76,"longitude":-103.71},{"id":"iem_G_42.060_-102.890_1782522000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782522000000,"latitude":42.06,"longitude":-102.89},{"id":"iem_H_41.710_-103.680_1782516840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782516840000,"latitude":41.71,"longitude":-103.68},{"id":"iem_F_41.670_-103.100_1782523080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782523080000,"latitude":41.67,"longitude":-103.1},{"id":"iem_G_42.060_-102.890_1782518400000","source":"iem","severity":"low","severityValue":25,"timestamp":1782518400000,"latitude":42.06,"longitude":-102.89},{"id":"iem_F_41.660_-103.090_1782525360000","source":"iem","severity":"low","severityValue":25,"timestamp":1782525360000,"latitude":41.66,"longitude":-103.09}] |
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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