This alert expired on 12 March 2026 at 10:30 UTC. It is kept here as a record.
It is the 16th strongest of the 229 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 11 March 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 12 at 4:58AM EDT until March 12 at 6:30AM EDT by NWS Baltimore MD/Washington DC
An estimated 4,861,740 people live within 50 km of this point.
Nearby, since 11 March 2026
- May 20, 2026 · score 52 · 2.6 km
- August 10, 2026 · score 52 · 4.0 km
- July 22, 2026 · score 52 · 4.0 km
How we know
Confirmed by 27 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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 | 89% |
| Coordinates | 39.0020, -76.6463 |
| Nearest City | Crofton (4 km) |
| Population Exposed | 4.9M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-12T08:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special-Marine-Warning_noaa_urn-oid-2_49_0_1_840_0_a180b503689d2b453198c96271084f94 |
Score Breakdown
35
intensity
100
population
0
cascading
80
historical
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chesapeake Bay north of Pooles Island MD; Chesapeake Bay from Pooles Island to Sandy Point MD; Chesapeake Bay from Sandy Point to North Beach MD; Patapsco River including Baltimore Harbor; Chester River to Queenstown MD; Eastern Bay; Choptank River to Cambridge MD and the Little Choptank River; 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 4:58AM EDT until March 12 at 6:30AM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-12T06:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a180b503689d2b453198c96271084f9423e4a10c.001.1","noaa_urn:oid:2.49.0.1.840.0.74762dca4454baf499556e997735dd7cc0efe9a4.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 ESE Pikesville |
| Spc County | Baltimore |
| Spc State | MD |
| Spc Comments | Several calls for trees/wires down in the Pikesville area... including near the intersection of Greenspring Avenue and Quarry Lake Drive (LWX) |
| MergedSources | [{"id":"spc_wind_39.27_-77.31_106","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.27,"longitude":-77.31},{"id":"spc_wind_39.56_-77.12_107","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.56,"longitude":-77.12},{"id":"spc_wind_39.24_-77.28_109","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.24,"longitude":-77.28},{"id":"spc_wind_39.27_-77.35_110","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.27,"longitude":-77.35},{"id":"spc_wind_39.56_-77.12_111","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.56,"longitude":-77.12},{"id":"spc_wind_39.26_-77.23_112","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.26,"longitude":-77.23},{"id":"spc_wind_39.28_-77.20_113","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.28,"longitude":-77.2},{"id":"spc_wind_39.56_-77.12_114","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.56,"longitude":-77.12},{"id":"spc_wind_39.26_-77.17_115","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.26,"longitude":-77.17},{"id":"spc_wind_39.28_-77.13_117","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.28,"longitude":-77.13},{"id":"spc_wind_39.57_-76.99_118","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.57,"longitude":-76.99},{"id":"spc_wind_39.31_-77.11_119","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.31,"longitude":-77.11},{"id":"spc_wind_39.17_-77.24_120","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.17,"longitude":-77.24},{"id":"spc_wind_39.33_-77.06_121","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.33,"longitude":-77.06},{"id":"spc_wind_39.33_-77.04_122","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.33,"longitude":-77.04},{"id":"spc_wind_39.32_-77.02_123","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.32,"longitude":-77.02},{"id":"spc_wind_39.32_-77.03_124","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.32,"longitude":-77.03},{"id":"spc_wind_39.31_-76.98_125","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.31,"longitude":-76.98},{"id":"spc_wind_39.32_-76.98_126","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.32,"longitude":-76.98},{"id":"spc_wind_39.34_-76.94_128","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.34,"longitude":-76.94},{"id":"spc_wind_39.35_-76.96_129","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.35,"longitude":-76.96},{"id":"spc_wind_39.33_-76.90_130","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.33,"longitude":-76.9},{"id":"spc_wind_39.36_-76.92_131","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.36,"longitude":-76.92},{"id":"spc_wind_39.35_-76.72_133","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.35,"longitude":-76.72},{"id":"spc_wind_39.37_-76.69_134","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.37,"longitude":-76.69},{"id":"spc_wind_39.39_-76.69_135","source":"spc","severity":"medium","severityValue":45,"timestamp":1773309778608,"latitude":39.39,"longitude":-76.69}] |
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.
Calamity.live data shows a weather event with CalamityScore 52/100, near Crofton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.