This alert expired on 15 June 2026 at 01:30 UTC. It is kept here as a record.
It is the 96th strongest of the 177 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 14 at 8:23PM EDT until June 14 at 9:30PM EDT by NWS Baltimore MD/Washington DC
Nearby, since 12 March 2026
- June 26, 2026 · score 34 · 6.6 km
- March 12, 2026 · score 43 · 7.5 km
- August 2, 2026 · score 28 · 9.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % 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) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 38.3769, -76.4089 |
| Nearest City | St. Charles (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-15T00:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.21676f4d299bad240bb26e7c10184802 |
Score Breakdown
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; Patapsco River including Baltimore Harbor; Chester River to Queenstown MD; Chesapeake Bay from Smith Point to Windmill Point VA; Chesapeake Bay from Windmill Point to New Point Comfort VA; Rappahannock River from Urbanna to Windmill Point; Chesapeake Bay from Drum Point MD to Smith Point VA; Tidal Potomac from Cobb Island MD to Smith Point VA and 4 more areas |
| Headline | Special Marine Warning issued June 14 at 8:23PM EDT until June 14 at 9:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-14T21:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.21676f4d299bad240bb26e7c1018480254d882ac.001.1","noaa_urn:oid:2.49.0.1.840.0.e006548c0139a3421d7031c06e99c809d38cc158.001.1","noaa_urn:oid:2.49.0.1.840.0.ec386015cf56fa13563c42af06e8ff54213610d1.001.1","noaa_urn:oid:2.49.0.1.840.0.14db1bbc7a60779dbf91db17952bb875883ff608.001.1","noaa_urn:oid:2.49.0.1.840.0.b4a04f9bd9610acba60bee28cd211c4b77b09947.001.1","noaa_urn:oid:2.49.0.1.840.0.a2cbd5600456d6bd70e9000beb20e031aaf66285.001.1","noaa_urn:oid:2.49.0.1.840.0.38d0547d21683f69e329c4bab467155c2594b75f.001.1"] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.