Catonsville, Maryland 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

557
FXUS61 KLWX 290748
AFDLWX

Area Forecast Discussion
National Weather Service Baltimore MD/Washington DC
348 AM EDT Thu May 29 2025

.SYNOPSIS...
Low pressure exits offshore, then a cold front pushes later in the
day. Precipitation chances linger Friday and Saturday as another low
pressure system tracks up the east coast, with conditions drying out
under high pressure Sunday.

&&

.NEAR TERM /THROUGH TONIGHT/...
A stationary front bending from the Carolinas to the Central
Appalachians, with a CAD wedge across our area is producing
widespread low clouds and some patchy fog. Some drizzle at times,
but conditions look to be mostly dry this morning. Steady temps in
the 50s that have not changed much since yesterday afternoon.

A weak surface low now off the coast continues to push away today,
with a weak area of high pressure quickly passing through. Aloft, we
will be in deep southwesterly flow and a drier mid-level airmass
advecting in from the west.

We are going to struggle to eat away at the CAD this morning given
light winds in the boundary layer. The clouds do lift in the
afternoon, but expect mostly cloudy skies for the day. A shortwave
trough aloft moves over the area late afternoon and that helps to
break some of the cloud cover, and also generate scattered showers
and thunderstorms west of the Blue Ridge. These showers and storms
move east toward I-95 corridor in the evening. Highs today are
forecast to reach the mid to upper 70s, though there is uncertainty
in that due to lingering cloud cover.

A weak front moves south into the area tonight and likely stalls
somewhere south of I-66. This does help to clear out most of the
convection to east of I-95. Mild conditions as lows settle in the
low to mid 60s east of the Blue Ridge, and upper 50s to the west.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/...
The frontal area remains across the area Friday as an upper level
low approaches from the west. An area of low pressure develops along
the frontal zone, then quickly moves across the area Friday
afternoon. The system departs to the northeast Friday night.

Widespread showers and scattered thunderstorms are likely to develop
across the area. Strong ascent from the approaching trough, enough
instability and moderate shear will be favorable for some strong to
severe thunderstorms to develop. There is uncertainty regarding how
much instability there is given the presence of clouds in the
morning. Additionally, there is a threat for flash flooding due to
multiple rounds of heavy rainfall along the frontal zone.

Highs on Friday are forecast in the mid to upper 80s, with a few
spots possibly reaching 80F. The chance for rain may linger well
into Friday night as the low only slowly pulls away.


The upper trough aloft lingers over the area, then digs south over
the lower Mid-Atlantic on Saturday. This is likely to produce a lot
of showers over our area for most of the day Saturday. Abundant
cloud cover keeps highs cooler in the upper 60s to lower 70s. A cold
front sweeps through Saturday night, finally bringing an end to an
active stretch of weather. This frontal passage does bring a late
season surge of cold air as temps drop to the 40s to low 50.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
Weak high pressure will keep the region dry on Sunday. A low
pressure system will move east along the Ohio Valley late Sunday,
then across the mid-Atlantic Sunday night and Monday. A couple of
showers or perhaps a thunderstorm or two could develop with this low
Sunday night through Monday evening. During the overnight Monday,
the low pressure will move to the east and high pressure will become
establishes later Monday night through Wednesday.

High temperatures Sunday will be cooler than average with daytime
highs in the lower to middle 70s. Highs on Monday will be in the
middle to upper 70s. Highs Tuesday near 80 to the lower 80s.
Wednesday will be the warmest of the four with highs in the lower to
middle 80s.

&&

.AVIATION /08Z THURSDAY THROUGH MONDAY/...
Widespread low clouds early this morning will be slow to burn off
after sunrise. Conditions remain at IFR, though given the steady
north winds still present that will likely prevent widespread fog
from developing. Abundant cloud cover at just above VFR returns by
this afternoon. There could be some scattered showers and storms,
with PROB30 groups in the TAFs. There could be some additional low
stratus and fog tonight.

Friday and Saturday look to be active in terms of afternoon showers
and thunderstorms. Outside of that, conditions are forecast to be
VFR with generally light winds.

VFR conditions Sunday through Sunday evening. Any showers or gusty
thunderstorms that do move across the terminals Sunday overnight
through Monday evening could bring brief MVFR conditions. Otherwise,
VFR conditions expected. Winds northwest 5 to 10 knots Sunday
through Monday. Winds becoming southwest 5 to 10 knots Monday
night.

&&

.MARINE...
Even as a cold front moves across the area later today, winds are
forecast to remain below SCA levels through tonight. A warm front
lifts north into the area, though south winds still at 10 knots or
less. Another front drops south into the area Friday night and
stalls through Saturday. This likely brings a period of SCA winds
through Saturday night. Showers and thunderstorms are likely Friday
and Saturday afternoons, with some strong storms possible. A strong
cold front sweeps through Saturday night.

No marine hazards Sunday through Monday night. Winds northwest 5 to
10 knots Sunday through Monday night.

&&

.TIDES/COASTAL FLOODING...
Tide levels are forecast to remain elevated today through Saturday
as mostly south winds prevail. At this time there is no explicit
minor flooding forecast, though a few spots could just reach minor
flooding during the higher diurnal high tide. Most locations will
reach Action Stage at high tide. Winds turn offshore late Saturday
behind a cold front, with water levels dropping through the
weekend.

&&

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

&&

$$

SYNOPSIS...KRR
NEAR TERM...KRR
SHORT TERM...KRR
LONG TERM...KLW
AVIATION...KRR/KLW
MARINE...KRR/KLW
TIDES/COASTAL FLOODING...KRR