Right now
The most recent data we hold from IEM arrived 17 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
5 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by IEM today.
No stronger detection stands among the 6 recorded within 20 km of this point since 20 March 2026 — 4 others scored the same. The last comparable one was on 3 September 2026. One more was recorded here in the fortnight before it.
What the source measured
IEM reported: Mesonet station GW3478 TCTIBER.
How we know
One source: IEM. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Legacy data-support index | 0.43/1 |
| Coordinates | 48.4100, -111.1100 |
| Nearest City | Great Falls (102 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-26T01:45:00.000Z |
| Source | https://mesonet.agron.iastate.edu/lsr/ |
Physical priority index · v5. 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: iem. Occurrence: 2026-09-26T01:45:00.000Z.
First archived: 2026-09-26T12:08:46.235Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-26T13:24:05.793Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
2026-09-26T12:24:55.334Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| TypeSummary | Thunderstorm wind gust |
| LsrCode | G |
| LsrType | TSTM WND GST |
| Magnitude | 60 |
| Unit | MPH |
| City | 7 SE Lothair |
| County | Liberty |
| State | MT |
| Wfo | TFX |
| Remark | Mesonet station GW3478 TCTIBER. |
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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