Severe Weather near Greater Upper Marlboro
This alert expired on 2 September 2026 at 18:45 UTC. It is kept here as a record.
It is the 736th strongest of the 772 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 31 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 2:18PM EDT until September 2 at 2:45PM EDT by NWS Baltimore MD/Washington DC
An estimated 3,945,359 people live within 50 km of this point.
Nearby, since 10 March 2026
- July 4, 2026 · score 52 · 1.9 km
- August 6, 2026 · score 66 · 2.7 km
- June 11, 2026 · score 46 · 3.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 81 % 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 | 81% |
| Coordinates | 38.7786, -76.8057 |
| Nearest City | Greater Upper Marlboro (7 km) |
| Population Exposed | 3.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T18:18:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.416226f76b0093f93068b62d86a852789ac38c74.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fauquier, VA; Caroline, MD; Queen Anne's, MD; Talbot, MD; Fauquier, VA; Loudoun, VA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued September 2 at 2:18PM EDT until September 2 at 2:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-09-02T14:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.416226f76b0093f93068b62d86a852789ac38c74.001.1","noaa_urn:oid:2.49.0.1.840.0.6cae34cb9f56651358702633ab302385cc8337a0.002.1","noaa_urn:oid:2.49.0.1.840.0.191d768b319cdaf5cae066f6c49bbd0d87ccd0e1.002.1","noaa_urn:oid:2.49.0.1.840.0.25c362050595ea333b0b0ab09ff8064d6e41d24d.001.1","noaa_urn:oid:2.49.0.1.840.0.9fe3c48a3047c324880b1fe00f237c73dc3bd71f.001.1"] |
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 Greater Upper Marlboro?
Calamity.live data shows a weather event with CalamityScore 46/100, near Greater Upper Marlboro (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.