Area Forecast Discussion
Issued by NWS Sterling, VA
FXUS61 KLWX 280719
Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
319 AM EDT Fri Oct 28 2016
.SYNOPSIS...High pressure will build over the area through Friday
night. A secondary cold front crosses the area Sunday afternoon.
High pressure builds again Sunday night into the middle of next
.NEAR TERM /THROUGH TONIGHT/...Low pressure is located near Cape Cod
this morning and an associated cold front has moved through the
region overnight and is located in Central VA. Northwest winds
have been observed across the outlook area with some brief gusts
between 20-30 mph. Winds will increase shortly after sunrise and
gusty conditions will continue through the early afternoon. The
tight pressure gradient behind the front will move to the east
this afternoon and winds will become light by evening. Temps will
range from the mid to upper 50s across the north to the low to mid
60s across Central VA today.
High pressure briefly moves overhead tonight while warm air
advection begins aloft. Temps in the low to mid 40s expected
.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...High pressure moves south
of the region Saturday and southerly flow is expected. Mostly
sunny conditions and warmer air aloft will lead to temps rising
into the 70s Saturday afternoon.
By Saturday night...mid-high level clouds are going to move into the
region from the north as a cold front slowly sags southward from New
England. Dry conditions are expected into Sunday. The cold front
will move into central PA by Sunday afternoon resulting in another
warm day across the Mid-Atlantic region. Temps are expected to rise
into the 70s again Sunday. At this time the cold front should move
through the Mid-Atlantic region Sunday night and showers are
possible during this time.
.LONG TERM /MONDAY THROUGH THURSDAY/...Ridge of high pressure will
amplify from the southeast into the mid-Atlc states the first
half of the work week leading to a warming trend with 80F deg
temps a good possibility by Wed. Ridge begins to break down Thu as
a strong shortwave-trough digs across the OH valley and northeast
states. Showers appear possible Thu-Thu night as this trough
moves across the area with temps returning back to the 60s for the
end of next week.
.AVIATION /07Z FRIDAY THROUGH TUESDAY/...VFR conditions expected
through Sunday. NW winds will continue behind an exiting cold
front today. Gusts up to 25 kts are possible mainly at
IAD/DCA/BWI/MTN through 18z today. Mostly clear conditions
expected through Saturday morning. Mid-high level clouds will
start to move into the region Saturday afternoon into Sunday. A
cold front will move through the terminals Sun night-Monday and a
few showers are possible.
VFR conditions expected Mon and Tue.
.MARINE...Small Craft Advisory remains in effect through this afternoon.
Northwest winds expected on the waters with peak gusts likely 25-30
knots this morning. High pressure building into the area will allow
for winds to diminish Friday evening. Winds become southerly
Saturday, however, they should stay below SCA criteria.
Winds should remain below Small Craft Advisory levels Sunday into
Monday as a front stalls just south of the area, although gusts
could approach Small Craft Advisory thresholds Monday in brief
northerly channeling behind a weak cold front.
Winds below SCA expected Mon through Wed.
MARINE...Small Craft Advisory until 6 PM EDT this evening for