This alert expired on 16 March 2026 at 19:15 UTC. It is kept here as a record.
It is the 610th strongest of the 745 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 2:35PM EDT until March 16 at 3:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 5,550,434 people live within 50 km of this point.
Nearby, since 10 March 2026
- June 22, 2026 · score 66 · 2.3 km
- August 6, 2026 · score 52 · 4.1 km
- July 4, 2026 · score 52 · 6.9 km
How we know
Confirmed by 20 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 87 % 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) | 52 / 100 |
| Our confidence | 87% |
| Coordinates | 39.0117, -76.8525 |
| Nearest City | Greenbelt (3 km) |
| Population Exposed | 5.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T18:35:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ac01bb6ab039b744952fe90ee32c2919 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Baltimore, MD; Carroll, MD; Harford, MD; Howard, MD; Baltimore City, MD; Anne Arundel, MD; Howard, MD; Montgomery, MD; Prince Georges, MD; Charles, MD; Prince Georges, MD; St. Marys, MD; Fairfax, VA; King George, VA; Spotsylvania, VA; Stafford, VA |
| Headline | Severe Thunderstorm Warning issued March 16 at 2:35PM EDT until March 16 at 3:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-16T15:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ac01bb6ab039b744952fe90ee32c291941a9c102.001.1","noaa_urn:oid:2.49.0.1.840.0.15222a4bc87e5aecf8d33489bdaf9a8bf2049ca9.001.1","noaa_urn:oid:2.49.0.1.840.0.efb3789d57da6944bd3abd7552fa8c3386064fe3.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 SW Reston |
| Spc County | Fairfax |
| Spc State | VA |
| Spc Comments | Tree reported down on Lawyers Road at Fox Mill Road. (LWX) |
| Iem TypeSummary | D |
| Iem City | 2 ENE Clarksburg |
| Iem County | Montgomery |
| Iem State | MD |
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.
Want to know when something happens near Greenbelt?
Calamity.live data shows a weather event with CalamityScore 52/100, near Greenbelt (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.