Special Marine Warning issued March 12 at 4:40AM EDT until March 12 at 6:15AM EDT by NWS Baltimore MD/Washington DC
Geographic Context
This weather event occurred near Woodlawn (approximately 2 km away) in United States, an area that experiences a range of natural hazards. An estimated 3.9M people live within 50 km of the event location, placing this in the "significant" population impact tier.
Event Assessment
This event is a weather event classified as medium severity. Calamity.live has classified it as "medium" severity with a severity value of 50. The computed Calamity Score is 52 out of 100, reflecting a moderate-impact event. The primary scoring components are: population (100), historical (80), intensity (35). Data for this event was sourced from noaa, one of the 250 scientific monitoring sources aggregated by Calamity.live.
Regional Monitoring Context
United States has a documented history of weather events. Monitoring for weather events in the region relies on a combination of ground-based sensors, satellite remote sensing, and official reporting from national agencies. The frequency and severity of such events are tracked over time to support risk assessment and emergency preparedness.
Event Data
| Type | Weather |
| Severity | medium |
| Severity Value | 50 |
| Calamity Score | 52 / 100 |
| Confidence | 88% |
| Coordinates | 38.7000, -77.1367 |
| Nearest City | Woodlawn (2 km) |
| Population Exposed | 3.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T08:40:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD |
| Headline | Special Marine Warning issued March 12 at 4:40AM EDT until March 12 at 6:15AM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-12T06:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 S Marriottsville |
| Spc County | Howard |
| Spc State | MD |
| Spc Comments | Trees down onto houses in the 1300 to 1500 block of Driver Road. (LWX) |
| MergedSources | [{"id":"spc_wind_39.25_-77.57_101","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.25,"longitude":-77.57},{"id":"spc_wind_39.22_-77.53_102","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.22,"longitude":-77.53},{"id":"spc_wind_39.22_-77.48_103","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.22,"longitude":-77.48},{"id":"spc_wind_39.27_-77.31_106","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.27,"longitude":-77.31},{"id":"spc_wind_39.24_-77.28_109","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.24,"longitude":-77.28},{"id":"spc_wind_39.27_-77.35_110","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.27,"longitude":-77.35},{"id":"spc_wind_39.26_-77.23_112","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.26,"longitude":-77.23},{"id":"spc_wind_39.28_-77.20_113","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.28,"longitude":-77.2},{"id":"spc_wind_39.26_-77.17_115","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.26,"longitude":-77.17},{"id":"spc_wind_39.28_-77.13_117","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.28,"longitude":-77.13},{"id":"spc_wind_39.31_-77.11_119","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.31,"longitude":-77.11},{"id":"spc_wind_39.17_-77.24_120","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.17,"longitude":-77.24},{"id":"spc_wind_39.33_-77.06_121","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.33,"longitude":-77.06},{"id":"spc_wind_39.33_-77.04_122","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.33,"longitude":-77.04},{"id":"spc_wind_39.32_-77.02_123","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.32,"longitude":-77.02},{"id":"spc_wind_39.32_-77.03_124","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.32,"longitude":-77.03},{"id":"spc_wind_39.31_-76.98_125","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.31,"longitude":-76.98},{"id":"spc_wind_39.32_-76.98_126","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.32,"longitude":-76.98},{"id":"spc_wind_39.34_-76.94_128","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.34,"longitude":-76.94},{"id":"spc_wind_39.35_-76.96_129","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.35,"longitude":-76.96},{"id":"spc_wind_39.33_-76.90_130","source":"spc","severity":"medium","severityValue":45,"timestamp":1773305383861,"latitude":39.33,"longitude":-76.9}] |
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.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 52/100, near Woodlawn (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 197 scientific monitoring sources.