Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 23 June 2026 at 00:45 UTC. It is kept here as a record.
What the source measured
NOAA reported: Special Marine Warning issued June 22 at 6:53PM EDT until June 22 at 8:45PM EDT by NWS Baltimore MD/Washington DC
Urban PEI: 2,514,526 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.83/1 |
| Coordinates | 38.7619, -76.5103 |
| Nearest City | Greater Upper Marlboro (22 km) |
| Urban exposure index (PEI) | 2.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T22:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.36fb97eb33c626ccde4d0823dc9ea9bd |
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: 2026-06-22T22:53:00.000Z.
First archived: 2026-06-22T22:55:22.556Z. 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 Pooles Island to Sandy Point MD; Chesapeake Bay from Sandy Point to North Beach MD; Chesapeake Bay from North Beach to Drum Point MD; Chester River to Queenstown MD; Eastern Bay; Choptank River to Cambridge MD and the Little Choptank River; Patuxent River to Broomes Island MD; Chesapeake Bay from Drum Point MD to Smith Point VA; Tidal Potomac from Indian Head to Cobb Island MD; Tidal Potomac from Cobb Island MD to Smith Point VA; Tangier Sound and the inland waters surrounding Bloodsworth Island; Tidal Potomac from Key Bridge to Indian Head MD and 3 more areas |
| Headline | Special Marine Warning issued June 22 at 6:53PM EDT until June 22 at 8:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-22T20:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.36fb97eb33c626ccde4d0823dc9ea9bd958ad109.001.1","noaa_urn:oid:2.49.0.1.840.0.0efb2a55fee3a9bbfb08cc1cde948479e9a002c9.001.1","noaa_urn:oid:2.49.0.1.840.0.1d75c56268f0a46186899fc0280dee0dce5c3339.001.1","noaa_urn:oid:2.49.0.1.840.0.dfa2d7f2783d7b2dac8484ac6b92e81b9cd0c0be.001.1","noaa_urn:oid:2.49.0.1.840.0.d29c492b045799f7d45c6d747d6ecb1d26ba5653.001.1","noaa_urn:oid:2.49.0.1.840.0.4c8a90525165bceacbb45604a1ae1020e841b815.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 WNW Burke |
| Iem County | Fairfax |
| Iem State | VA |
| Iem Wfo | LWX |
| Iem Remark | Numerous trees down in vicinity of Pond Spice Lane and Heron Pond Terrace. Siding and shingle damage as well. |
| MergedSources | [{"id":"iem_D_38.790_-77.300_1782162240000","source":"iem","severity":"low","severityValue":25,"timestamp":1782162240000,"latitude":38.79,"longitude":-77.3}] |
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.
Review the area, threshold and delivery channel in your account.
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