Reported by SPC today.
It is the 2nd strongest of the 11 detections recorded within 20 km of this point since 14 May 2026. The last comparable one was on 4 August 2026.
What the source measured
SPC reported: Wind 63 kt near 4 WSW Johnstown, Grand Forks, ND. Personal weather station. (FGF)
An estimated 57,011 people live within 50 km of this point.
Nearby, since 14 May 2026
- August 3, 2026 · score 39 · 22.4 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 32 out of 100, at 84 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 32 / 100 |
| Our confidence | 84% |
| Coordinates | 48.1200, -97.5400 |
| Nearest City | Grand Forks (43 km) |
| Population Exposed | 57.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-03T18:09:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 63 |
| Location | 4 WSW Johnstown |
| County | Grand Forks |
| State | ND |
| Comments | Personal weather station. (FGF) |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | Warren |
| Iem County | Marshall |
| Iem State | MN |
| Iem Wfo | FGF |
| Iem Remark | Estimated winds up to 60mph with pea sized hail. |
| MergedSources | [{"id":"iem_G_47.970_-97.400_1788460560000","source":"iem","severity":"low","severityValue":25,"timestamp":1788460560000,"latitude":47.97,"longitude":-97.4},{"id":"iem_G_48.120_-97.540_1788458940000","source":"iem","severity":"low","severityValue":25,"timestamp":1788458940000,"latitude":48.12,"longitude":-97.54},{"id":"iem_G_48.200_-96.770_1788462480000","source":"iem","severity":"low","severityValue":25,"timestamp":1788462480000,"latitude":48.2,"longitude":-96.77}] |
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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Calamity.live data shows a weather event with CalamityScore 32/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.