Severe weather in United States
This alert expired on 15 June 2026 at 02:00 UTC. It is kept here as a record.
It is the 4th strongest of the 42 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 13 June 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 14 at 8:54PM EDT until June 14 at 10:00PM EDT by NWS Baltimore MD/Washington DC
Nearby, since 16 March 2026
- March 16, 2026 · score 22 · 2.5 km
- July 23, 2026 · score 34 · 10.7 km
- July 6, 2026 · score 22 · 13.4 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 61 % 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 | 61% |
| Coordinates | 37.6836, -76.3221 |
| Nearest City | Williamsburg (57 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-15T00:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.4f4653050fe0e32209644b10f1f7f19f |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chesapeake Bay from North Beach to Drum Point 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; 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; York River; James River from Jamestown to the James River Bridge; James River from JRB to HRBT, Including the Elizabeth River; Coastal waters from Parramore Island to Cape Charles Light VA out 20 NM |
| Headline | Special Marine Warning issued June 14 at 8:54PM EDT until June 14 at 10:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-14T22:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4f4653050fe0e32209644b10f1f7f19f4def2430.001.1","noaa_urn:oid:2.49.0.1.840.0.e4dfa4b2a07b7ab6e02ad7219cd9f91e5b80ac2a.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.