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Elev 138 ft, 38.51 °N, 77.02 °W

Port Tobacco, MD Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Port Tobacco, MD
Elevation: 138ft
Nearby Weather Stations

Active Weather Alerts

Small Craft Advisory
Issued: 8:27 PM Aug. 23, 2025 – National Weather Service
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SUNDAY...

* WHAT...Southeast winds 10 to 15 kt with gusts up to 25 kt.

* WHERE...Tidal Potomac River from Indian Head MD to Smith Point
VA, and Chesapeake Bay from Smith Point VA to Pooles Island MD
and adjoining estuaries.

* WHEN...Until 2 AM EDT Sunday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

Coastal Flood Advisory
Issued: 6:11 PM Aug. 23, 2025 – National Weather Service
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT
SUNDAY...

* WHAT...Up to two feet of inundation above ground level in low
lying areas due to tidal flooding.

* WHERE...Shoreline in Charles and King George Counties.

* WHEN...Until 7 PM EDT Sunday, especially around the time of
high tide.

* IMPACTS...At 3.5 feet, water reaches yards near Cobb Island
and docks near Dahlgren.

* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Goose Bay is at 5:04 PM and 5:19
AM. The next high tide at Indian Head is at 8:58 PM and 9:13 AM.
The next high tide at Dahlgren is at 3:58 PM and 4:18 AM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

&&

Time of high total tides are approximate to the nearest hour.

Upper Machodoc Creek at Dahlgren
MLLW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 7.0 ft
MHHW Categories - Minor 1.6 ft, Moderate 3.1 ft, Major 5.1 ft

Total      Total    Departure
Day/Time    Tide       Tide     from Norm   Waves    Flood
ft MLLW    ft MHHW       ft       ft      Impact
--------  ---------  ---------  ---------  -------  --------
23/04 PM     3.8        1.9        1.7       1.0     Minor
24/04 AM     3.8        1.9        1.6       0.5     Minor
24/05 PM     3.6        1.7        1.5       1.0     Minor
25/04 AM     3.4        1.5        1.4       0.5      None
25/05 PM     3.2        1.3        1.1       0.5      None
26/05 AM     2.9        1.0        0.9       0.5      None

&&

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