Area Forecast Discussion
Issued by NWS Sterling, VA-- Remove Highlighting --
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FXUS61 KLWX 271827
Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
227 PM EDT Thu Oct 27 2016
A cold front will cross the area this evening. High pressure will
build over the area tonight through Friday night. A secondary
cold front crosses the area Sunday afternoon. High pressure builds
again Sunday night into the middle of next week.
.NEAR TERM /TONIGHT/...
Area of showers is approaching the Bay. Cooler temperatures aloft
have increased the upper level instability...this has allowed for
a few lightning strikes/rumbles of thunder.
Cold front will move through the forecast area this evening.
Scattered showers will be possible through mid evening...then
clearing after midnight. Lows in the 40s...lower 50s along and
east of I-95.
.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
Friday will be the coolest day as high pressure builds into the
area. Expect it to be breezy with highs in the lower 60s. Friday
night will be cool with lows in the lower 40s.
Jet stream remains to the north of the area..a high zonal pattern.
This will help keep Mid Atlantic in relatively warm air through
the weekend. Saturday should see temperatures rising back into the
lower/mid 70s as high pressure drifts to the south of the region.
Lows Saturday night in the mid 50s except lower 60s in the cities.
.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
A cold front will cross the area Sunday but should lack appreciable
moisture. Therefore, only a few showers are anticipated.
Strong ridging will build south of the area early next week
resulting in several days of warmer and drier than normal
conditions. Daytime highs could approach 80 degrees during the
middle of next week, which is about 15 to 20 degrees above normal
for the first week of November.
With the ridging in place, very little moisture will be available,
so while a weak boundary will remain stalled near the area much of
the week, very little if any precipitation is expected until perhaps
the end of next week as heights begin to fall in response to a
retrograding blocky pattern originating near Greenland.
.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
Ceilings are beginning to improve but expect skies to remain
cloudy through mid evening. Clearing is expected overnight then
VFR conditions Friday and Saturday.
Mainly VFR expected Sunday into Monday. A few showers are possible
ahead of a weakening cold front Sunday. Westerly winds near 10
knots Sunday will become northerly Sunday night into Monday after
the passage of the front.
Small Craft Advisory in effect for the remainder of the afternoon
through Friday afternoon. High pressure building into the area
will allow for winds to diminish Friday evening. No problems
Winds should remain largely below Small Craft Advisory levels
Sunday into Monday as a weak 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.
MARINE...Small Craft Advisory until 6 PM EDT Friday for ANZ530>543.