Severe Weather near Helena
Right now
The most recent data we hold from SPC arrived 53 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.
Reported by SPC 25 days ago.
No stronger detection stands among the 36 recorded within 20 km of this point since 14 March 2026 — 29 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 71 kt near 2 ENE Helena, Lewis and Clark, MT. 71 mph wind gust at the Helena Airport. (TFX)
Urban PEI: 32,091 within a heuristic 50 km radius; not unique people.
Nearby, since 14 March 2026
- July 1, 2026 · 20.6 km
How we know
2 recorded sources include SPC; 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 | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 46.6000, -111.9900 |
| Nearest City | Helena (4 km) |
| Urban exposure index (PEI) | 32.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T20:53:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
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: spc. Occurrence: 2026-09-02T20:53:00.000Z.
First archived: 2026-09-02T22:41:08.537Z. 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
| ReportType | wind |
| Speed | 71 |
| Location | 2 ENE Helena |
| County | Lewis and Clark |
| State | MT |
| Comments | 71 mph wind gust at the Helena Airport. (TFX) |
| Iem TypeSummary | G |
| Iem Magnitude | 71 |
| Iem Unit | MPH |
| Iem City | 2 ENE Helena |
| Iem County | Lewis and Clark |
| Iem State | MT |
| Iem Wfo | TFX |
| Iem Remark | 71 mph wind gust at the Helena Airport. |
| MergedSources | [{"id":"iem_G_46.600_-111.990_1788382380000","source":"iem","severity":"low","severityValue":25,"timestamp":1788382380000,"latitude":46.6,"longitude":-111.99}] |
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.
Review the area, threshold and delivery channel in your account.
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