Right now
The most recent data we hold from NOAA arrived 9 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 March 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 97 recorded within 20 km of this point since 17 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 16 at 9:51PM EDT until March 16 at 10:00PM EDT by NWS Baltimore MD/Washington DC
Nearby, since 17 March 2026
- June 13, 2026 · score 22 · 7.9 km
- July 6, 2026 · score 22 · 9.8 km
- June 14, 2026 · score 22 · 14.3 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 | High |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.68/1 |
| Coordinates | 38.1642, -76.3936 |
| Nearest City | St. Charles (68 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-03-17T01:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.dc10728e28d0ad269f548d084924bb56 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-03-17T01:51:00.000Z.
First archived: 2026-03-17T02:00:05.606Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
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; Tidal Potomac from Cobb Island MD to Smith Point VA; Chesapeake Bay from Smith Point to Windmill Point VA; Chesapeake Bay from Windmill Point to New Point Comfort VA; Chesapeake Bay from New Point Comfort to Little Creek VA; Chesapeake Bay from Little Creek VA to Cape Henry VA including the Chesapeake Bay Bridge Tunnel; Rappahannock River from Urbanna to Windmill Point; York River; James River from Jamestown to the James River Bridge; James River from James River Bridge to Hampton Roads Bridge-Tunnel and 2 more areas |
| Headline | Special Marine Warning issued March 16 at 9:51PM EDT until March 16 at 10:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-16T22:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dc10728e28d0ad269f548d084924bb56479a071d.001.1","noaa_urn:oid:2.49.0.1.840.0.24e087753f07e0c699002ea0bf03fcbf7e0bb545.001.1","noaa_urn:oid:2.49.0.1.840.0.2eb9b0ee992f49db40c6d81bcb1213d19382b8cc.001.1","noaa_urn:oid:2.49.0.1.840.0.e922c83a7f38068f3e715dc8fd9b04acc82915c5.001.1","noaa_urn:oid:2.49.0.1.840.0.6f06305c73cea93ba0b0c8ba019841752ea2aeef.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 81 |
| Spc Location | 4 SSE Tompkinsville |
| Spc County | Charles |
| Spc State | MD |
| Spc Comments | Wind gusts estimated at 65 to 70 mph. (LWX) |
| MergedSources | [{"id":"spc_wind_37.96_-76.91_230","source":"spc","severity":"medium","severityValue":45,"timestamp":1773710040000,"latitude":37.96,"longitude":-76.91},{"id":"spc_wind_38.27_-76.86_232","source":"spc","severity":"high","severityValue":70,"timestamp":1773710460000,"latitude":38.27,"longitude":-76.86}] |
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.
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