This alert expired on 3 August 2026 at 18:15 UTC. It is kept here as a record.
It is the 8th strongest of the 199 detections recorded within 20 km of this point since 12 March 2026. The last comparable one was on 2 August 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 3 at 12:43PM EDT until August 3 at 2:15PM EDT by NWS Baltimore MD/Washington DC
An estimated 3,837,384 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 5, 2026 · score 66 · 1.2 km
- June 12, 2026 · score 52 · 1.5 km
- March 12, 2026 · score 52 · 2.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 58 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 | high |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 87% |
| Coordinates | 38.6781, -77.1525 |
| Nearest City | Woodlawn (5 km) |
| Population Exposed | 3.8M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-03T16:43:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Tidal Potomac from Key Bridge to Indian Head MD; Tidal Potomac from Indian Head to Cobb Island MD |
| Headline | Special Marine Warning issued August 3 at 12:43PM EDT until August 3 at 2:15PM EDT by NWS Baltimore MD/Washington DC |
| Expires | 2026-08-03T14:15:00-04:00 |
| SenderName | NWS Baltimore MD/Washington DC |
| HasExactCoords | true |
| Ogimet StationId | 72503 |
| Ogimet WindSpeed | 51 |
| Ogimet WindUnit | knots |
| Ogimet Temperature | -55.8 |
| Ogimet TemperatureUnit | C |
| Ogimet RawSynop | 08,03,11,51,AAXX 03124 72503 11558 81907 10239 20228 30057 40070 50007 60421 710// 91151 333 10300 20233 70429 96010 555 90312= |
| MergedSources | [{"id":"ogimet_72503_1785775942849","source":"ogimet","severity":"high","severityValue":70,"timestamp":1785775942849,"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.
Calamity.live data shows a weather event with CalamityScore 58/100, near Woodlawn (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.