Right now
The most recent data we hold from NOAA arrived 4 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 12 June 2026 at 01:45 UTC. It is kept here as a record.
It is the 164th strongest of the 259 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 11 at 7:45PM EDT until June 11 at 9:45PM EDT by NWS Baltimore MD/Washington DC
An estimated 5,053,330 people live within 50 km of this point.
Nearby, since 11 March 2026
- June 11, 2026 · score 46 · 0.0 km
- July 28, 2026 · score 52 · 2.9 km
- July 9, 2026 · score 52 · 4.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 38.9580, -76.6731 |
| Nearest City | Crofton (5 km) |
| Population Exposed | 5.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T23:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.e78824aa55bf13f765fd7661a2df7fe2 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chesapeake Bay north of Pooles Island MD; Chesapeake Bay from Pooles Island to Sandy Point MD; Chesapeake Bay from Sandy Point to North Beach MD; Patapsco River including Baltimore Harbor; Chester River to Queenstown MD; Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD |
| Headline | Special Marine Warning issued June 11 at 7:45PM EDT until June 11 at 9:45PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-06-11T21:45:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e78824aa55bf13f765fd7661a2df7fe224c27f2e.001.1","noaa_urn:oid:2.49.0.1.840.0.4cba4ce19b0696dcc60d272d824f4a2371e35893.001.1"] |
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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