-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KLWX 091438
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
1038 AM EDT Thu Sep 9 2021

.SYNOPSIS...
A cold front slowly crossing the area will push off to the
southeast later this morning. Thereafter, sprawling high
pressure build eastward from the central U.S., moving overhead
Friday before shifting offshore early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
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Mid-morning update: Only minor change to the forecast this
morning was to drop high temperatures today by a few degrees
with the thick cloud cover in place. Have most locations topping
out in the mid 70s now. Previous discussion follows...

A cold front will continue its slow southeastward progression
this morning, exiting the southeastern portion of the CWA by
late morning. However, the primary trough axis won`t actually
make its crossing until this evening. As a result, outside of
lingering shower activity east of the Blue Ridge Mountains this
morning, additional showers will be possible this afternoon,
albeit low end chance. Plentiful cloud cover should hold
temperatures in the 70s for most today, while 60s hold strong
along the Alleghenies.

Clearing skies and cool temperatures is in store tonight as the
aforementioned trough axis pushes to our east and high pressure over
the central U.S. nudges eastward. Lows tonight will drop back into
50s, near 60 in the city centers, with 40s in the higher
elevations.
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&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
High pressure to our west will build overhead late Friday into
Saturday, before centering to our southeast Saturday night.
Resultant weather will be clear skies, dry conditions, and
cooler than normal temperatures. Northwest breezes on Friday
will turn more southerly by Saturday afternoon, but remain on
the lighter side. Highs Friday will hold in the mid to upper
70s, with 60s in the mountains, while overnight lows drop into
the 40s and 50s once again. As southerly breezes reemerge on
Saturday, temperatures will be a touch warmer, generally in the
upper 70s to low 80s and lows Saturday night back into the
middle 50s to middle 60s.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
Ridge of high pressure at the sfc and aloft will remain the dominant
wx feature next week and support above normal temperatures and dry
conditions. However, ISOLD showers/t-storms will still be possible
over the Appalachian Mountains Tue-Thu.

&&

.AVIATION /15Z THURSDAY THROUGH MONDAY/...
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A cold front will press southeast of the terminals this morning
as shower activity lingers and winds remain light out of the
northwest. Conditions are expected to remain VFR through the
remainder of the day, with brief drops to MVFR possible during
showers.

High pressure moves back into the region Friday and Friday
night, but with a bit of a gradient Friday morning and
afternoon, which could yield northwest wind gusts to around 20
knots at times. The gradient relaxes Friday night with the high
overhead and VFR conditions persisting. Winds will turn light
and southerly Saturday as the high centers south of the area and
VFR conditions continue.

No sig wx expected Sun through Tue.
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&&

.MARINE...
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A cold front will cross the waters this morning, delivering
scattered showers and isolated thunderstorms. The front will
push southeast of the waters later this morning with a downward
trend in shower activity.

A secondary front will slide across the waters later this
evening and overnight, increasing winds out of the northwest.
Have issued a Small Craft Advisory overnight and persisting
through the day on Friday as northwest winds gust to around 20
knots. High pressure nudges overhead late Friday and Friday
night with light northwest winds. The high will center itself to
the south and east Saturday as winds turn southerly but remain
sub SCA.

SCA conditions are possible Sun in srly flow. Gradient relaxes
after Sun with fair weather expected.
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&&

.TIDES/COASTAL FLOODING...
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Tidal anomalies should start to drop as winds turn northwesterly
and start to increase in magnitude later tonight into tomorrow.
Despite the decreasing anomalies, the more sensitive sites will
still likely reach action stage during many of the upcoming
tidal cycles.
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&&

.LWX WATCHES/WARNINGS/ADVISORIES...
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DC...None.
MD...None.
VA...None.
WV...None.
MARINE...Small Craft Advisory from midnight tonight to 6 PM EDT Friday
     for ANZ530>534-537-539>541-543.
     Small Craft Advisory from 6 AM to 6 PM EDT Friday for ANZ535-
     536-538-542.
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&&

$$
SYNOPSIS...BKF
NEAR TERM...BKF/KJP
SHORT TERM...BKF
LONG TERM...LFR
AVIATION...BKF/LFR/KJP
MARINE...BKF/LFR
TIDES/COASTAL FLOODING...KJP