Area Forecast Discussion
Issued by NWS Sterling, VA

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
614
FXUS61 KLWX 201838
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
238 PM EDT Fri Oct 20 2017

.SYNOPSIS...High pressure will remain in control of the region
through early next week. A strong cold front will move through
the area on Tuesday.

&&

.NEAR TERM /THROUGH TONIGHT/...Clear tonight except for a few
high thin clouds under high pressure. Lows in the mid to upper
40s except mid-upper 50s in urban areas.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...High pressure at
the sfc and aloft will remain in control over the region through
Monday maintaining fair weather with pleasant afternoons and
cool nights.

&&

.LONG TERM /MONDAY THROUGH FRIDAY/...

Monday starts dry with southerly flow and temperatures rising
to the mid-70s for most locations over our CWA. A strong cold
front approaches from the west later on Monday and into Tuesday
as low pressure deepens tracking N-NE through the front. A deep
trough will settle over the eastern CONUS and slowly push east.

Precipitation associated to this system could start as early as
Monday night, but the cold front will move east across our region on
Tuesday, when the heavier precipitation is expected. Current
guidance has PW values between 1 and 1.5 inches. Cold air advection
behind the front and a tight pressure gradient will allow for colder
temperatures and gusty winds at times. High temperatures will be in
the 60s and 70s, with Wednesday and Thursday being the coldest
days... only reaching the low 60s or 50s at higher elevations.

Upper trough axis will move across over our region Wednesday into
Thursday, with some showers possible over our area. High pressure
builds in into Friday.

&&

.AVIATION /19Z FRIDAY THROUGH WEDNESDAY/...

No significant wx expected into early next week under high
pressure surface and aloft.

VFR/dry conditions expected for part of Monday. Precipitation
expected Monday night into Tuesday bringing sub-VFR conditions
at times.

&&

.MARINE...

High pressure in control into early next week with excellent
weather.

No small craft advisory expected on Monday. Gale conditions
possible on Tuesday on strong srly winds.

&&

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

&&

$$
SYNOPSIS...LFR
NEAR TERM...LFR
SHORT TERM...LFR
LONG TERM...IMR
AVIATION...IMR/LFR
MARINE...IMR/LFR



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.