This alert expired on 26 June 2026 at 22:30 UTC. It is kept here as a record.
It is the 4th strongest of the 217 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 26 at 5:13PM EDT until June 26 at 6:30PM EDT by NWS Baltimore MD/Washington DC
An estimated 2,425,543 people live within 50 km of this point.
Nearby, since 16 March 2026
- August 8, 2026 · score 52 · 3.6 km
- May 28, 2026 · score 52 · 6.1 km
- June 12, 2026 · score 52 · 6.2 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 66 out of 100, at 87 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 66 / 100 |
| Our confidence | 87% |
| Coordinates | 38.4682, -77.1553 |
| Nearest City | Cherry Hill (15 km) |
| Population Exposed | 2.4M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-06-26T21:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e755fac738df91511419fee2f90066f0bccfc9bf.002.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tidal Potomac from Indian Head to Cobb Island MD |
| Headline | Special Marine Warning issued June 26 at 5:13PM EDT until June 26 at 6:30PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-26T18:30:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| Ogimet StationId | 72503 |
| Ogimet WindSpeed | 84 |
| Ogimet WindUnit | knots |
| Ogimet Temperature | 25 |
| Ogimet TemperatureUnit | C |
| Ogimet RawSynop | 06,26,17,51,AAXX 26184 72503 12566 63004 10250 20189 30152 40165 58004 69901 91751 333 10250 20211 555 92618= |
| Google News RssFeed | weather |
| Google News SourceName | The Washington Post |
| MergedSources | [{"id":"ogimet_72503_1782507242204","source":"ogimet","severity":"critical","severityValue":90,"timestamp":1782507242204,"latitude":38.9,"longitude":-77},{"id":"gnews_weather_495139_235","source":"google_news","severity":"medium","severityValue":40,"timestamp":1782503733000,"latitude":38.9,"longitude":-77.04}] |
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 66/100, near Cherry Hill (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.