Reported by SPC today.
No stronger detection stands among the 12 recorded within 20 km of this point since 18 March 2026 — one other scored the same. The last comparable one was on 23 June 2026.
What the source measured
SPC reported: Wind 65 kt near 10 NNW Sonnette, Powder River, MT. Mesonet station MTHCD Home Creek Divide Us-212 Mp 81.5. (BYZ)
How we know
Confirmed by 7 independent sources, including SPC.
Our own score for this event is 22 out of 100, at 66 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 66% |
| Coordinates | 45.5500, -105.8900 |
| Nearest City | Sheridan (118 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T19:30:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 65 |
| Location | 10 NNW Sonnette |
| County | Powder River |
| State | MT |
| Comments | Mesonet station MTHCD Home Creek Divide Us-212 Mp 81.5. (BYZ) |
| Iem TypeSummary | G |
| Iem Magnitude | 46 |
| Iem Unit | MPH |
| Iem City | 1 SW Coalwood |
| Iem County | Powder River |
| Iem State | MT |
| Iem Wfo | BYZ |
| Iem Remark | Mesonet station MTCWD Coalwood Mt-59 Mp 55.9. |
| MergedSources | [{"id":"iem_G_45.300_-106.160_1788121620000","source":"iem","severity":"low","severityValue":25,"timestamp":1788121620000,"latitude":45.3,"longitude":-106.16},{"id":"iem_G_45.660_-106.490_1788115800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788115800000,"latitude":45.66,"longitude":-106.49},{"id":"iem_G_45.550_-105.890_1788118200000","source":"iem","severity":"low","severityValue":25,"timestamp":1788118200000,"latitude":45.55,"longitude":-105.89},{"id":"iem_G_45.340_-106.520_1788115800000","source":"iem","severity":"low","severityValue":25,"timestamp":1788115800000,"latitude":45.34,"longitude":-106.52},{"id":"iem_G_45.440_-105.360_1788119100000","source":"iem","severity":"low","severityValue":25,"timestamp":1788119100000,"latitude":45.44,"longitude":-105.36},{"id":"iem_G_45.730_-105.590_1788119100000","source":"iem","severity":"low","severityValue":25,"timestamp":1788119100000,"latitude":45.73,"longitude":-105.59}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100, near Sheridan (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.