This alert expired on 2 September 2026 at 18:30 UTC. It is kept here as a record.
It is the 151st strongest of the 250 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 2 at 1:58PM EDT until September 2 at 2:30PM EDT by NWS Baltimore MD/Washington DC
An estimated 4,305,680 people live within 50 km of this point.
Nearby, since 11 March 2026
- July 28, 2026 · score 52 · 0.3 km
- July 18, 2026 · score 52 · 2.8 km
- August 10, 2026 · score 52 · 3.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 92 % 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 | 92% |
| Coordinates | 39.1151, -76.5735 |
| Nearest City | Pasadena (1 km) |
| Population Exposed | 4.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T17:58:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.8030952b9112bf119b46fbc97247e26c2e2c2376.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clarke, VA; Fauquier, VA; Loudoun, VA; Caroline, MD; Kent, MD; Queen Anne's, MD; Talbot, MD; Kent, DE; New Castle, DE |
| Headline | Severe Thunderstorm Warning issued September 2 at 1:58PM EDT until September 2 at 2:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-09-02T14:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8030952b9112bf119b46fbc97247e26c2e2c2376.001.1","noaa_urn:oid:2.49.0.1.840.0.d77ec241e310ff84e31e78d369a3fb6dd49d9a65.001.1","noaa_urn:oid:2.49.0.1.840.0.9c023d9398745874c06ca40a79c08efc64196fe2.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 N Bentley Springs |
| Spc County | Baltimore |
| Spc State | MD |
| Spc Comments | Numerous wires down in northern Baltimore County... in and around Hereford. (LWX) |
| Iem TypeSummary | M |
| Iem Magnitude | 45 |
| Iem Unit | mph |
| Iem City | 1 N Baltimore Martin St |
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 Pasadena?
Calamity.live data shows a weather event with CalamityScore 46/100, near Pasadena (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.