This alert expired on 22 June 2026 at 22:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 135 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 22 at 5:14PM EDT until June 22 at 6:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 5,411,163 people live within 50 km of this point.
Nearby, since 11 March 2026
- July 22, 2026 · score 52 · 4.6 km
- June 22, 2026 · score 52 · 4.7 km
- August 6, 2026 · score 66 · 4.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 66 out of 100, at 81 % 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 | 81% |
| Coordinates | 39.0275, -76.7606 |
| Nearest City | Crofton (7 km) |
| Population Exposed | 5.4M within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-06-22T21:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.c97907d09c2af4af3764a1464f4f315b |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tidal Potomac from Key Bridge to Indian Head MD; Chesapeake Bay from Pooles Island to Sandy Point MD; Patapsco River including Baltimore Harbor |
| Headline | Special Marine Warning issued June 22 at 5:14PM EDT until June 22 at 6:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-22T18:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c97907d09c2af4af3764a1464f4f315bd9596361.001.1","noaa_urn:oid:2.49.0.1.840.0.b9554337584ae71bd333cef54f2167639289b6eb.001.1"] |
| Ogimet StationId | 72503 |
| Ogimet WindSpeed | 84 |
| Ogimet WindUnit | knots |
| Ogimet Temperature | 22.8 |
| Ogimet TemperatureUnit | C |
| Ogimet RawSynop | 06,22,17,51,AAXX 22184 72503 12766 81113 10228 20172 30129 40142 58016 69901 91751 333 10228 20194 555 92218= |
| MergedSources | [{"id":"ogimet_72503_1782162039020","source":"ogimet","severity":"critical","severityValue":90,"timestamp":1782162039020,"latitude":38.9,"longitude":-77}] |
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.
Want to know when something happens near Crofton?
Calamity.live data shows a weather event with CalamityScore 66/100, near Crofton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.