This alert expired on 2 August 2026 at 21:30 UTC. It is kept here as a record.
It is the 7th strongest of the 40 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 12 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 2 at 4:00PM EDT until August 2 at 5:30PM EDT by NWS Wakefield VA
Nearby, since 16 March 2026
- March 17, 2026 · score 22 · 13.4 km
- July 12, 2026 · score 22 · 15.4 km
- June 23, 2026 · score 22 · 17.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 66% |
| Coordinates | 37.8772, -76.7985 |
| Nearest City | Mechanicsville (58 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-02T20:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.c700a3dfa89a6e8501a81f23f4518873 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Chesapeake Bay from Windmill Point to New Point Comfort VA; Chesapeake Bay from New Point Comfort to Little Creek VA; Chesapeake Bay from Little Creek VA to Cape Henry VA including the Chesapeake Bay Bridge Tunnel; Rappahannock River from Urbanna to Windmill Point; York River; James River from Jamestown to the James River Bridge; James River from JRB to HRBT, Including the Elizabeth River; Coastal waters from Parramore Island to Cape Charles Light VA out 20 NM; Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD |
| Headline | Special Marine Warning issued August 2 at 4:00PM EDT until August 2 at 5:30PM EDT by NWS Wakefield VA |
| Expires | 2026-08-02T17:30:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c700a3dfa89a6e8501a81f23f451887325df860f.001.1","noaa_urn:oid:2.49.0.1.840.0.c8a8f08ae9a4e39796bb37ec47ffe5197701463d.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 41 |
| Iem Unit | mph |
| Iem City | 8 SSE Oakley |
| Iem County | ANZ537 |
| Iem State | MD |
| Iem Wfo | LWX |
| MergedSources | [{"id":"iem_M_38.170_-76.700_1785697320000","source":"iem","severity":"low","severityValue":25,"timestamp":1785697320000,"latitude":38.17,"longitude":-76.7}] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.