This alert expired on 5 July 2026 at 02:15 UTC. It is kept here as a record.
It is the 5th strongest of the 230 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 4 July 2026. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 4 at 10:05PM EDT until July 4 at 10:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 333,809 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 17, 2026 · score 43 · 4.2 km
- June 12, 2026 · score 43 · 11.4 km
- July 21, 2026 · score 67 · 12.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 39.6884, -74.0839 |
| Nearest City | Ocean Acres (18 km) |
| Population Exposed | 333.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T02:05:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Coastal waters from Cape May NJ to Cape Henlopen DE out 20 NM; Coastal waters from Cape Henlopen to Fenwick Island DE out 20 NM; Waters from Great Egg Inlet NJ to Cape May NJ from 20 to 60 NM; Waters from Cape May NJ to Fenwick Island DE from 20 to 60 NM; Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 NM; Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 NM; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 NM; Coastal waters from Great Egg Inlet to Cape May NJ out 20 NM; Waters from Sandy Hook NJ to Manasquan Inlet NJ from 20 to 40 NM; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ from 20 to 60 NM; Waters from Little Egg Inlet NJ to Great Egg Inlet NJ from 20 to 60 NM and 4 more areas |
| Headline | Special Marine Warning issued July 4 at 10:05PM EDT until July 4 at 10:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-07-04T22:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c66f16827c53e596559b065648ad1768c36be2c6.001.1","noaa_urn:oid:2.49.0.1.840.0.da80f15d2327c9d218c3a8680ba664538676b61e.001.1","noaa_urn:oid:2.49.0.1.840.0.5d23d6ebb0fbe0321c12185e941115b8d9361a8d.001.1","noaa_urn:oid:2.49.0.1.840.0.012f816037da687b4c7191e3978a5c1d569924ad.002.1","noaa_urn:oid:2.49.0.1.840.0.62b2fa4bef2031c84f3ea4d5b3be76a9bed39a70.001.1","noaa_urn:oid:2.49.0.1.840.0.17eb69071a202476c703ab0047bec666159170fb.001.1","noaa_urn:oid:2.49.0.1.840.0.806fb9267b2ab4aab02a53e95333f00e1e5b14bc.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 43/100, near Ocean Acres (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.