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ANZ535 Tidal Potomac From Key Bridge To Indian Head- 633 Am Est Mon Dec 11 2023
.gale warning in effect until 1 pm est this afternoon...
Today..NW winds 15 to 20 kt with gusts to 25 kt. Waves 1 ft. A chance of rain this morning.
Tonight..NW winds 10 to 15 kt...becoming W around 5 kt after midnight. Waves 1 ft.
Tue..SW winds 5 to 10 kt. Waves 1 ft.
Tue night..SW winds 5 to 10 kt. Waves 1 ft.
Wed..NW winds 5 to 10 kt. Waves 1 ft.
Wed night..NW winds 5 to 10 kt. Waves 1 ft.
Thu..NW winds 5 to 10 kt. Waves 1 ft.
Fri..W winds 5 to 10 kt. Waves 1 ft.

ANZ500 633 Am Est Mon Dec 11 2023
Synopsis for the tidal potomac and md portion of the chesapeake bay..
high pressure will build in through Tuesday. A weak cold front will track through Wednesday morning. High pressure will return for Thursday into Friday.

FXUS61 KLWX 110827 AFDLWX

Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 327 AM EST Mon Dec 11 2023

SYNOPSIS
After a bout of wintry weather this morning, a drier start to the workweek will soon follow by the early afternoon hours with high pressure building in today and tonight. Conditions will likely remain dry Tuesday into Saturday with temperatures warming slightly into the weekend as high pressure lingers around the Mid- Atlantic.

NEAR TERM /THROUGH TONIGHT/
Colder air has worked into a large portion of the area early this morning, with snow at least being mixed in as far east as KDCA. More steady snowfall resides in the higher elevations along the Blue Ridge and the southern sections of the Allegheny Front. Accumulating snowfall remains more likely along the higher elevations of the Blue Ridge and points further west into the Alleghenies this morning. That being said, a light dusting to maybe an inch of snow are possible further east, mainly west of the I-95 corridor if anywhere. Most guidance continues to hint at the precipitation moving out of the area by 12z-13z aside from the higher elevations along the Allegheny Front where lingering low- level moisture will stick around through portions of the afternoon. There may be a few snow squall streamers that work into portions of far western MD late this morning that we will continue to monitor the chance for, especially in areas that are not under any winter headlines (i.e. Allegany MD).

Winds are expected to pick up again further this morning into the afternoon hours. A tightening pressure gradient will situate itself over the Mid-Atlantic as a result of incoming high pressure nearby coupled with the departing low pressure system. Gusty northwest winds will develop again this morning, gusting 25 to 30 knots at times throughout the area with 35 to 40 knot gusts possible across the higher terrain of the Blue Ridge. Winds will begin to gradually decrease by this evening. Highs for today will settle into the upper 20s for the Alleghenies with upper 30s to mid 40s further east.
Gusty winds will allow wind chills to drop down into the teens for the highest elevations, with 20s and low 30s for the lower elevations. Overnight lows tonight will drop down into the upper teens for some of the western areas to the 20s elsewhere.

SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/
High pressure is expected to continue and reinforce into Tuesday with winds diminishing and dry conditions expected. Highs for Tuesday afternoon will be 3 to 5 degrees warmer compared to today.
Lows for the overnight hours will drop down into the 20s to low 30s for most areas. Wednesday will feature some similarities to Tuesday with mostly dry conditions, a few more high clouds may swing through the day. Winds will be elevated once more, mainly north of I-66 with northwest gusts 15 to 20 knots at times throughout the afternoon.
Lows will drop down into the teens for the Allegheny Front with 20s expected further east, even along the shorelines.

LONG TERM /THURSDAY THROUGH SUNDAY/
High pressure dominates across the region, maintaining dry and seasonal conditions late week into the weekend. Cooler highs on Thursday in the 40s, becoming upper 40s to low 50s Friday through the weekend. Still cold Thursday night as lows drop to the upper teens to 20s, then nighttime temps moderate to the upper 20s to 30s Friday night into the weekend.

The next system to impact the region could come late next weekend into the start of the following week. The GFS and ECMWF develop a coastal low over/near the Southeast states, then move the low north in vicinity of the Mid-Atlantic. However, the forecast is very uncertain due to significant timing/intensity discrepancies between the models.

AVIATION /09Z MONDAY THROUGH FRIDAY/
Sub-VFR ceilings and visibilities will continue this morning for the majority of the terminals as a result of snow falling. Precipitation will likely end at KMRB over the next hour or so and the remaining terminals will follow along through 12z-13z when the precipitation continues to move further east. Gusty northwest winds will continue throughout the afternoon and early evening hours, gusting 20 to 30 knots at times before diminishing. VFR conditions will build in after the morning hours and continue through Wednesday, with lighter winds expected Tuesday and early Wednesday before gusty northwest winds return for most of the terminals.

VFR conditions are expected Thursday and Friday as high pressure dominates. Northwest winds Thursday could gust up to 15KT in the afternoon, then winds become west on Friday.

MARINE
Gusty northwest winds will continue through portions of the today. A Gale Warning remains in effect for all the waters through the early afternoon. SCA winds will likely follow shortly behind for later this afternoon and into the early evening. High pressure will be nearby Tuesday into Tuesday night. Winds will increase Wednesday as a result of a dry cold front moving through, SCA winds will be likely for the afternoon and early evening hours.

A brief period of borderline SCA conditions is possible Thursday afternoon as high pressure builds into the region. Northwest winds could gust 15-20KT, then decrease quickly Thursday night. High pressure is forecast to be overhead on Friday, producing favorable marine conditions.

LWX WATCHES/WARNINGS/ADVISORIES
DC...None.
MD...Winter Weather Advisory until noon EST today for MDZ001.
VA...Winter Weather Advisory until noon EST today for VAZ503.
Winter Weather Advisory until 6 AM EST early this morning for VAZ025>027-029-504.
Winter Storm Warning until 6 AM EST early this morning for VAZ507-508.
WV...Winter Weather Advisory until 6 AM EST early this morning for WVZ055-506.
Winter Storm Warning until noon EST today for WVZ501-505.
MARINE...Gale Warning until 1 PM EST this afternoon for ANZ530>543.

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Chain Bridge, one mile below, Washington, D.C., Tide feet

Reagan National Airport
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Mon -- 01:13 AM EST     0.03 feet Low Tide
Mon -- 05:57 AM EST     Moonrise
Mon -- 06:45 AM EST     2.51 feet High Tide
Mon -- 07:16 AM EST     Sunrise
Mon -- 12:51 PM EST     -0.02 feet Low Tide
Mon -- 03:30 PM EST     Moonset
Mon -- 04:46 PM EST     Sunset
Mon -- 06:50 PM EST     3.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Reagan National Airport, Washington, D.C., Tide feet

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