Severe Weather in United States
Right now
The most recent data we hold from NOAA arrived 88 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
4 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 14 September 2026 at 04:16 UTC. It is kept here as a record.
No stronger detection stands among the 49 recorded within 20 km of this point since 17 March 2026 — 12 others scored the same. Another comparable one was recorded here earlier the same day. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 13 at 10:06PM MDT until September 13 at 10:15PM MDT by NWS Great Falls MT
How we know
3 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 v4. 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 | 0.71/1 |
| Coordinates | 47.3767, -110.2844 |
| Nearest City | Great Falls (78 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-14T04:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.c5c0bd2eb873bbe4e3bf6fefd818745fc07763bd.001.1 |
Physical priority index · v4 (historical). 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: 2026-09-14T04:06:00.000Z.
First archived: 2026-09-14T04:10:36.176Z. 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 | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chouteau, MT; Judith Basin, MT |
| Headline | Severe Thunderstorm Warning issued September 13 at 10:06PM MDT until September 13 at 10:15PM MDT by NWS Great Falls MT |
| Expires | 2026-09-13T22:16:00-06:00 |
| SenderName | NWS Great Falls MT |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 3 SSE Raynesford |
| Spc County | Judith Basin |
| Spc State | MT |
| Spc Comments | Time estimated from radar. (TFX) |
| Iem TypeSummary | H |
| Iem Magnitude | 0.88 |
| Iem Unit | Inch |
| Iem City | 9 W Monarch |
| Iem County | Cascade |
| Iem State | MT |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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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