Marine Weather and Tide Forecast for Washington, DC

SHORT TERM /THROUGH THURSDAY/
The cold front is along a line from LBE to MGW to CBE as of 06Z. Radar shows showers along the front itself. However, most guidance has any shower activity along the front dissipating by the time it gets east of the Allegheny mountains. Otherwise, mild conditions are expected through daybreak underneath mostly cloudy skies. Forecast lows will be in the 50s to low 60s, with a few upper 40s along the Alleghenies.

For today, the aforementioned cold front will slowly drift southward through the FA before stalling to the south Wednesday as high pressure builds to the north. The forecast has continued to trend drier over the past couple of days for both today and Wednesday across central VA with the front progged to stall further south. However, cannot rule out a stray shower in central VA or far southern MD, especially today.

Temperatures today through Thursday will be in the 70s to low 80s each day with those at higher elevations staying in the 60s.
Overnight lows drop into the 40s and 50s both nights. RHs will fall into the 30% range each afternoon, but the lack of wind and green-up should prevent any widespread fire wx concerns.

Thursday night a warm front will approach from the south. Most guidance keeps any showers out of the area til daybreak Friday.
Will continue to monitor.

LONG TERM /FRIDAY THROUGH MONDAY/
On Friday, a frontal boundary initially off to the south will lift northward as a warm front across the Mid-Atlantic region. Not only will this favor continued warm weather, but it also introduces increasing chances for showers and thunderstorms. A southwesterly flow aloft persists, accompanied by a series of weaker perturbations within the jet. At this juncture, these particular features are on the diffuse side and of lower predictability. However, forcing should improve into Friday night and Saturday as an upstream shortwave trough moves in from the Tennessee/Ohio valleys. This favors an increasingly unsettled pattern heading into the first half of the weekend.

Depending on the degree of instability in the atmosphere, a few stronger thunderstorms are not out of the question on Saturday. The cold front attendant to these height falls moves through the first half of Saturday. Despite being post-frontal, some residual showers are possible into Saturday afternoon/evening as the trough aloft moves through. In the wake, a sprawling area of Canadian high pressure moves in from the Great Lakes. This will make for a cooler finish to the weekend and into early next week.

Through Saturday, forecast highs will be in the 70s to near 80 degrees before temperatures drop into Sunday/Monday. The dome of high pressure is forecast to keep highs in the upper 60s to low 70s on Sunday. Ensembles show some gradual uptick in temperatures into Monday as return flow ensues. Before this occurs, expect a relatively cool night on Sunday as widespread 40s are possible.



AVIATION /06Z TUESDAY THROUGH SATURDAY/
As a cold front to the west tracks through overnight, a spotty shower cannot be ruled out. However, VFR conditions are likely to prevail both in the wake, and through mid-week as high pressure builds in. Winds shift to northwesterly behind the front this morning before shifting to west/northwesterly on Wednesday. Light winds are expected, blowing less than 10 knots.

A warm front will slowly approach the area Thursday, though VFR and mainly dry conditions are expected. Winds become southerly behind the warm front.

Given an increase in shower and thunderstorm chances, sub-VFR conditions are possible at times on Friday into portions of Saturday. However, expect these restrictions to be intermittent and driven by the passage of such storms. Initial southerly winds are forecast to shift to west-northwesterly by Saturday evening behind a cold front. Gusts up to 15 to 20 knots are possible.



MARINE
SCA has been cancelled as winds have subsided. Winds will shift to northwesterly this morning in the wake of a cold front moving over the waters. Winds are expected to remain below SCA criteria through Thursday as high pressure builds to the north.

A warm front moves through on Friday afternoon which will favor an uptick in southeasterly winds over the waters. Some southerly channeling is expected which may bring winds close to advisory levels. Increasing shower and thunderstorms chances emerge into Friday night and Saturday. A cold front moves through Saturday afternoon/evening which may warrant additional Small Craft Advisories.



LWX WATCHES/WARNINGS/ADVISORIES
DC...None.
MD...None.
VA...None.
WV...None.
MARINE...None.