Gaithersburg, Maryland 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

487
FXUS61 KLWX 011835
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
135 PM EST Sun Nov 1 2026

.WHAT HAS CHANGED...
No significant changes made to the forecast as dry stretch
continues.

&&

.KEY MESSAGES...
- 1) Dry conditions continue through mid week, then cloudy &
  rainy towards the end of the week with an incoming cold front.

&&

.DISCUSSION...

KEY MESSAGE 1...Dry conditions continue through mid week, then
cloudy & rainy towards the end of the week with an incoming cold
front.

The stretch of benign weather conditions is expected to continue
through the middle of the work week. Surface high pressure centered
over the Northeast today is going to slide offshore tonight into
Monday. The ridge then remains nearly stationary over the western
Atlantic and maintains its influence across the region. The surface
ridge becomes somewhat vertically stacked as a mid-to upper ridge
builds over the Carolinas Tuesday into Wednesday. While return
southerly flow does bring temperatures back to the 70s Tuesday into
Wednesday, conditions are expected to remain dry as widespread
subsidence dominates and no appreciable moisture advection into the
region occurs until late in the week. Speaking of, a strong upper
trough does approach from the OH Valley Wednesday, but is slowed in
its progress due to a stronger, more stacked ridge to its east.
Scattered showers reach the Alleghenies sometime Wednesday afternoon
to evening, but most of that activity should be light given the
lingering dry low-level airmass.

High temperatures in the low to mid 70s Tuesday and Wednesday are
going to be well above normal for early November. Daily high
temperature records for the first week of November at all of our
climate stations are mostly in the low 80s, so not expecting any
record breaking warmth at this time.

Surface high pressure begins to break down around midweek as a
strong upper-level trough forms over the Great Lakes before pushing
eastward. Cloud cover likely begins to increase throughout the day
Wednesday as the stemming cold front approaches sometime
between Thursday and Friday. This will bring the first chance
for widespread beneficial rain throughout the region for the
first time in over two weeks. Total QPF amounts remain uncertain
at this time, but could accumulate in amounts averaging 0.5-1.5
inches throughout the region as the front pushes through.

Additional rain is possible next Monday & into early next week as a
second cold front moves in from the west. Temperatures will cool to
more seasonable conditions as these fronts move through, with highs
in the mid-60s and lows in the 40s at the start of next week.
Conditions become drier towards the middle of next week as the
trough transitions offshore.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
VFR conditions are expected to prevail through Wednesday night
across the region as high pressure maintains dry conditions and
light winds. Periods of mid-level to high-level clouds over the next
few days, but again no operational impacts expected.

A strong cold front begins to move into the region Thursday into
Friday. This is going to bring periods of rain along with likely sub-
VFR conditions, which could begin as early as Thursday morning.

&&

.MARINE...
Favorable marine conditions are expected across the local waters
through at least the middle of the work week. High pressure moves
offshore tonight, then settles over the western Atlantic through
Wednesday. Winds become southeast to south Monday through Wednesday
at around 10 knots. Some southerly channeling is possible Wednesday
into Thursday, and that could bring winds closer to SCA levels, but
confidence is low at this time. A strong cold front approaches from
the west on Thursday, possibly bringing a few thunderstorms Thursday
afternoon.

&&

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

&&

$$

DISCUSSION...KRR/SRT
AVIATION...KRR
MARINE...KRR