Right now
The most recent data we hold from NOAA arrived 35 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 27 May 2026 at 18:30 UTC. It is kept here as a record.
It is the 43rd strongest of the 247 detections recorded within 20 km of this point since 11 March 2026. The last comparable one was on 20 May 2026. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 27 at 12:26PM EDT until May 27 at 2:30PM EDT by NWS Baltimore MD/Washington DC
An estimated 56,020 people live within 50 km of this point.
Nearby, since 11 March 2026
- September 3, 2026 · score 32 · 6.5 km
- August 27, 2026 · score 34 · 12.1 km
- August 8, 2026 · score 34 · 12.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 38.9156, -75.5886 |
| Nearest City | Dover (28 km) |
| Population Exposed | 56.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-27T16:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f0a368d2d11789201423b9e0b246e11c |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tidal Potomac from Indian Head to Cobb Island MD; Tidal Potomac from Cobb Island MD to Smith Point VA; Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Coastal waters from Great Egg Inlet to Cape May NJ out 20 NM; Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; 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 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; Waters from Great Egg Inlet NJ to Cape May NJ from 20 to 60 NM |
| Headline | Special Marine Warning issued May 27 at 12:26PM EDT until May 27 at 2:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-05-27T14:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f0a368d2d11789201423b9e0b246e11c23b1a141.001.1","noaa_urn:oid:2.49.0.1.840.0.bfdb10c697bd170d8dc27b63b0f79c123de1ea70.001.1","noaa_urn:oid:2.49.0.1.840.0.e7f9917d3e846e5ddf9f690eec444322254e7fb4.001.1"] |
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 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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