Right now
The most recent data we hold from NOAA arrived 6 hours 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 4 July 2026 at 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 12 recorded within 20 km of this point since 14 May 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 3 at 5:40PM MDT until July 3 at 8:45PM MDT by NWS Glasgow MT
Nearby, since 14 May 2026
- July 30, 2026 · score 22 · 10.8 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 | 47.8891, -106.7055 |
| Nearest City | Williston (231 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T23:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.2fb402cdb82be90730efb04846882f06 |
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: 2026-07-03T23:40:00.000Z.
First archived: 2026-07-04T01:26:04.515Z. 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 | Valley, MT; Garfield, MT |
| Headline | Flash Flood Warning issued July 3 at 5:40PM MDT until July 3 at 8:45PM MDT by NWS Glasgow MT |
| Expires | 2026-07-03T20:45:00-06:00 |
| SenderName | NWS Glasgow MT |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2fb402cdb82be90730efb04846882f06dbfa9201.001.1","noaa_urn:oid:2.49.0.1.840.0.ee79f51928f9012afe5894e909960032d9159fa0.001.1","noaa_urn:oid:2.49.0.1.840.0.1a02685220b442152e023002c070a8027bdae2ed.001.1","noaa_urn:oid:2.49.0.1.840.0.09fae7f12cc7f691867b8aeee9055620f380cfb8.001.1","noaa_urn:oid:2.49.0.1.840.0.90c59a65d4a8135ac820666384922dcd37b69e87.001.1"] |
| Iem TypeSummary | F |
| Iem City | Glasgow |
| Iem County | Valley |
| Iem State | MT |
| Iem Wfo | GGW |
| Iem Remark | prolific ground hail, pea size. water running into home. Morgan Ellis. |
| MergedSources | [{"id":"iem_F_48.210_-106.640_1783119060000","source":"iem","severity":"low","severityValue":25,"timestamp":1783119060000,"latitude":48.21,"longitude":-106.64},{"id":"iem_F_48.200_-106.640_1783118160000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118160000,"latitude":48.2,"longitude":-106.64},{"id":"iem_G_48.210_-106.630_1783117020000","source":"iem","severity":"low","severityValue":25,"timestamp":1783117020000,"latitude":48.21,"longitude":-106.63},{"id":"iem_F_48.200_-106.640_1783121580000","source":"iem","severity":"low","severityValue":25,"timestamp":1783121580000,"latitude":48.2,"longitude":-106.64},{"id":"iem_F_48.190_-106.650_1783119120000","source":"iem","severity":"low","severityValue":25,"timestamp":1783119120000,"latitude":48.19,"longitude":-106.65},{"id":"iem_R_48.210_-106.640_1783124040000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124040000,"latitude":48.21,"longitude":-106.64},{"id":"iem_R_48.210_-106.630_1783124100000","source":"iem","severity":"low","severityValue":25,"timestamp":1783124100000,"latitude":48.21,"longitude":-106.63},{"id":"iem_F_48.190_-106.640_1783117500000","source":"iem","severity":"low","severityValue":25,"timestamp":1783117500000,"latitude":48.19,"longitude":-106.64},{"id":"iem_F_48.190_-106.640_1783118400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118400000,"latitude":48.19,"longitude":-106.64}] |
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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