Gaithersburg, Maryland 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

071
FXUS61 KLWX 010759
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
359 AM EDT Fri Aug 1 2025

.SYNOPSIS...

Strong high pressure will build into the area over the
weekend bringing below normal temperatures and humidity. High
pressure weakens into next week while the next front is expected
to slowly approach from the south. Rain chances return by the
middle of next week.

&&

.NEAR TERM /THROUGH TONIGHT/...

Strong 1030 mb high pressure center over northwest Wisconsin
will gradually build eastward over the weekend bringing a
significant change in air mass with temperatures more typical of
September. For today, a low cloud overcast is expected to
persist north of a frontal zone located south of the area with
isolated showers across the north and scattered to numerous
showers west of the Blue Ridge as an upper trough swings across
the Northeast and Mid-Atlantic states. It will be refreshingly
much cooler with highs in the mid 70s under a noticeable
northerly breeze.

Clearing will occur from north to south this evening as high
pressure continues to build from the west and pushes drier air
into the region.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/...

High pressure will settle north of the area over the weekend
with fair weather conditions expected. Expect broken stratocu
field to develop by late morning due to low-level moisture
trapped beneath a strong subsidence inversion. A little warmer
than Fri due to a bit more sunshine and less wind, but still
below normal for early August. Highs around 80 both Sat and Sun
with lows in the 50s west of I-95.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...

Surface high pressure will remain overhead on Monday while a quasi-
zonal flow is expected aloft. Dry and seasonably cool conditions for
early August can be expected. Expect low humidity to continue on
Monday as well.

The aforementioned high will move off the northeast coast during the
early to middle portion of next week while a potent upper-level
trough digs across the Great Lakes through the southeastern CONUS.
This will likely tap into southern stream moisture, and low pressure
may impact the area sometime during the middle portion of next week.
Timing is still uncertain, but rain chances will increase later
Tuesday, and especially Wednesday into Thursday as southern stream
moisture and low pressure possibly impact the area.

&&

.AVIATION /08Z FRIDAY THROUGH TUESDAY/...

MVFR/IFR cigs are expected today along with isolated showers.
North winds 10g20kt. Clearing is expected from north to south
later this evening. Sct-bkn stratocumulus clouds are expected
during the day both Sat and Sun with clearing at night.

VFR conditions expected with winds out of the E to ENE on both
Monday and Tuesday as high pressure shifts off the northeast coast.

&&

.MARINE...

Northerly winds will continue to strengthen through today before
they start diminishing late tonight into Saturday.

Winds should remain below SCA criteria on Monday and Tuesday with
relatively light E to ENE flow over the waters.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...None.
MD...Small Craft Advisory until midnight EDT tonight for MDZ008.
VA...None.
WV...None.
MARINE...Small Craft Advisory until midnight EDT tonight for ANZ530-531-
     538-539.
     Small Craft Advisory until noon EDT Saturday for ANZ532-533-
     540-541.
     Small Craft Advisory until midnight EDT Saturday night for
     ANZ534-537-543.
     Small Craft Advisory until midnight EDT tonight for ANZ535.
     Small Craft Advisory until noon EDT Saturday for ANZ536-542.

&&

$$

SYNOPSIS...LFR
NEAR TERM...LFR
SHORT TERM...LFR
LONG TERM...CJL
AVIATION...LFR/CJL
MARINE...LFR/CJL