This alert expired on 16 March 2026 at 20:00 UTC. It is kept here as a record.
It is the 5th strongest of the 97 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 3:16PM EDT until March 16 at 4:00PM EDT by NWS Baltimore MD/Washington DC
An estimated 2,039,620 people live within 50 km of this point.
Nearby, since 16 March 2026
- September 2, 2026 · score 46 · 0.3 km
- July 7, 2026 · score 52 · 1.6 km
- August 28, 2026 · score 52 · 5.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 83 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 83% |
| Coordinates | 39.4634, -76.3398 |
| Nearest City | Bel Air South (5 km) |
| Population Exposed | 2.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T19:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1419ffa4ec7703bde2fc2a630cfe4c43 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Anne Arundel, MD; Calvert, MD; Charles, MD; Prince Georges, MD; Baltimore City, MD; Lancaster, PA; York, PA |
| Headline | Severe Thunderstorm Warning issued March 16 at 3:16PM EDT until March 16 at 4:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-16T16:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1419ffa4ec7703bde2fc2a630cfe4c43eec3d620.001.1","noaa_urn:oid:2.49.0.1.840.0.dfc4ebd02ae8762839d1cd912b0640a1f9c9a581.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Lisbon |
| Spc County | Howard |
| Spc State | MD |
| Spc Comments | Multiple small trees reported down in the median of I-70 near the Woodbine Road exit (exit 73). (LWX) |
| MergedSources | [{"id":"spc_wind_39.34_-77.07_99","source":"spc","severity":"medium","severityValue":45,"timestamp":1773677040000,"latitude":39.34,"longitude":-77.07}] |
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 Bel Air South?
Calamity.live data shows a weather event with CalamityScore 52/100, near Bel Air South (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.