Reported by SPC today.
It is the 187th strongest of the 232 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 27 August 2026.
What the source measured
SPC reported: Wind UNK kt near 1 WSW Green Valley, Frederick, MD. A tree was down on wires along Green Valley Road at Lawson Road. (LWX)
An estimated 2,103,933 people live within 50 km of this point.
Nearby, since 11 March 2026
- September 2, 2026 · score 46 · 1.4 km
- July 6, 2026 · score 52 · 2.3 km
- July 18, 2026 · score 76 · 4.1 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 46 out of 100, at 87 % 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) | 46 / 100 |
| Our confidence | 87% |
| Coordinates | 39.3400, -77.2700 |
| Nearest City | Damascus (8 km) |
| Population Exposed | 2.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T17:07:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | UNK |
| Location | 1 WSW Green Valley |
| County | Frederick |
| State | MD |
| Comments | A tree was down on wires along Green Valley Road at Lawson Road. (LWX) |
| Iem TypeSummary | D |
| Iem City | 1 WSW Green Valley |
| Iem County | Frederick |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | A tree was down on wires along Green Valley Road at Lawson Road. |
| MergedSources | [{"id":"iem_D_39.340_-77.270_1788368820000","source":"iem","severity":"low","severityValue":25,"timestamp":1788368820000,"latitude":39.34,"longitude":-77.27}] |
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.
Want to know when something happens near Damascus?
Calamity.live data shows a weather event with CalamityScore 46/100, near Damascus (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.