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 27 May 2026 at 20:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 76 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 27 at 3:20PM EDT until May 27 at 4:00PM EDT by NWS Baltimore MD/Washington DC
Nearby, since 16 March 2026
- June 13, 2026 · score 22 · 2.1 km
- May 27, 2026 · score 22 · 6.9 km
- June 15, 2026 · score 22 · 14.6 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 70 % 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) | 22 / 100 |
| Our confidence | 70% |
| Coordinates | 37.7539, -76.1826 |
| Nearest City | Williamsburg (71 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-27T19:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.823fda10af775bedf984306ae83df3b6 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chesapeake Bay from Drum Point MD to Smith Point VA; Tangier Sound and the inland waters surrounding Bloodsworth Island; Chesapeake Bay from Windmill Point to New Point Comfort VA; Chesapeake Bay from New Point Comfort to Little Creek VA; Rappahannock River from Urbanna to Windmill Point |
| Headline | Special Marine Warning issued May 27 at 3:20PM EDT until May 27 at 4:00PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-05-27T16:00:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.823fda10af775bedf984306ae83df3b67b1365c4.002.1","noaa_urn:oid:2.49.0.1.840.0.ac02b212b6019a7630965fc51b597b192a4a449c.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 WNW Heathsville |
| Iem County | Northumberland |
| Iem State | VA |
| Iem Wfo | AKQ |
| Iem Remark | Trees and power lines downed at Dodlyt Road and Northumberland Highway. Time radar-estimated. |
| MergedSources | [{"id":"iem_D_37.870_-76.360_1779908100000","source":"iem","severity":"low","severityValue":25,"timestamp":1779908100000,"latitude":37.87,"longitude":-76.36},{"id":"iem_D_37.900_-76.540_1779907320000","source":"iem","severity":"low","severityValue":25,"timestamp":1779907320000,"latitude":37.9,"longitude":-76.54},{"id":"iem_D_38.030_-76.860_1779906000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779906000000,"latitude":38.03,"longitude":-76.86},{"id":"iem_D_37.920_-76.480_1779907500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779907500000,"latitude":37.92,"longitude":-76.48}] |
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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