Right now
The most recent data we hold from NOAA arrived 5 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 21 March 2026 at 00:54 UTC. It is kept here as a record.
It is the 2nd strongest of the 83 detections recorded within 20 km of this point since 17 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: Special Marine Warning issued March 20 at 8:44PM EDT until March 20 at 8:45PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 32,899 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- July 23, 2026 · score 34 · 12.5 km
- June 15, 2026 · score 22 · 12.6 km
- June 17, 2026 · score 22 · 13.6 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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 | Medium |
| Calamity Score (ours) | 34 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 38.2035, -76.1245 |
| Nearest City | Salisbury (49 km) |
| Urban exposure index (PEI) | 32.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-21T00:44:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.108cb49948b5cc23675a5b70a767c79ef60cff08.001.1 |
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: 2026-03-21T00:44:00.000Z.
First archived: 2026-03-21T00:45:30.200Z. 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 | Chesapeake Bay from Drum Point MD to Smith Point VA; Patuxent River to Broomes Island MD; Tangier Sound and the inland waters surrounding Bloodsworth Island |
| Headline | Special Marine Warning issued March 20 at 8:44PM EDT until March 20 at 8:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-03-20T20:54:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 39 |
| Iem Unit | mph |
| Iem City | 2 WSW Tompkinsville |
| Iem County | Charles |
| Iem State | MD |
| Iem Wfo | LWX |
| Iem Remark | A squall produced an estimated wind gust to 34 knots (39 MPH) near the Cuckold Creek WeatherFlow sensor (XCCK). |
| MergedSources | [{"id":"iem_M_38.230_-76.950_1774050720000","source":"iem","severity":"low","severityValue":25,"timestamp":1774050720000,"latitude":38.23,"longitude":-76.95},{"id":"iem_M_38.270_-76.880_1774050840000","source":"iem","severity":"low","severityValue":25,"timestamp":1774050840000,"latitude":38.27,"longitude":-76.88},{"id":"iem_M_38.220_-76.950_1774049040000","source":"iem","severity":"low","severityValue":25,"timestamp":1774049040000,"latitude":38.22,"longitude":-76.95},{"id":"iem_M_38.240_-76.820_1774050960000","source":"iem","severity":"low","severityValue":25,"timestamp":1774050960000,"latitude":38.24,"longitude":-76.82},{"id":"iem_M_38.310_-76.930_1774049580000","source":"iem","severity":"low","severityValue":25,"timestamp":1774049580000,"latitude":38.31,"longitude":-76.93}] |
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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