Right now
The most recent data we hold from NOAA arrived 20 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 3 July 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 3 April 2026 — 19 others scored the same. The last comparable one was on 27 June 2026. 18 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 2 at 7:09PM MDT until July 2 at 10:00PM MDT by NWS Billings MT
Nearby, since 3 April 2026
- July 3, 2026 · score 22 · 0.0 km
- June 23, 2026 · score 22 · 0.0 km
- June 21, 2026 · score 22 · 0.0 km
How we know
2 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 | 0.63/1 |
| Coordinates | 45.3086, -106.4210 |
| Nearest City | Sheridan (71 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T01:09:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.68abb2cb40cf129e3fa5398a9364d3ebf1797e8b.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: 2026-07-03T01:09:00.000Z.
First archived: 2026-07-03T02:25:38.425Z. 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 | Rosebud, MT |
| Headline | Flash Flood Warning issued July 2 at 7:09PM MDT until July 2 at 10:00PM MDT by NWS Billings MT |
| Expires | 2026-07-02T22:00:00-06:00 |
| SenderName | NWS Billings MT |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.25 |
| Iem Unit | Inch |
| Iem City | 9 NNE Wyarno |
| Iem County | Sheridan |
| Iem State | WY |
| Iem Wfo | BYZ |
| MergedSources | [{"id":"iem_H_44.930_-106.680_1783036500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783036500000,"latitude":44.93,"longitude":-106.68}] |
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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