181 FXUS61 KLWX 281804 AFDLWXArea Forecast Discussion National Weather Service Baltimore MD/Washington DC 204 PM EDT Sun Sep 28 2025
.SYNOPSIS... High pressure builds south from eastern Canada through much of the week. Meanwhile, Tropical Depression Nine is expected to approach the Southeast coast early this week then move out to sea through mid week. A strong cold front will track across the area by the middle of this week bringing cooler and drier weather.
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.NEAR TERM /THROUGH TONIGHT/... Abundant sunshine and warm temperatures are the main story for today as high pressure builds into the region in wake of a weak frontal passage this morning. Temps reach the upper 70s to lower 80s. The surface high moves closer to the region tonight as cirrus clouds begin to move over the area tonight. These are associated with a remnant offshore boundary and TD9 over the Bahamas. Areas of fog, some that could be dense, are possible tonight for areas along and west of US-15.
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.SHORT TERM /MONDAY THROUGH TUESDAY NIGHT/... The surface high pressure shifts offshore to start the week, causing winds locally to become easterly. It is important to note that this high will protect our region from any direct impacts associated with TD9 as that system approaches the Southeast coast.
A broad upper trough along the Eastern Seaboard cuts off as a disorganized low over the Southeast states Monday into Tuesday. The interaction of the cutoff low and TD9 will push some moisture up into our area. This could result in a few showers for areas those and south of I-66 Monday evening through Tuesday morning, though the best chance for showers looks to be from Charlottesville to Fredericksburg south.
Cloudy skies to start the week with temps in the upper 70s to around 80F Monday. Mild conditions Monday night as temps settle in the low to mid 60s. A stronger Canadian high starts to build in from the north on Tuesday. This brings slightly cooler temps in the mid to upper 70s and an uptick of northerly winds. Cooler air Tuesday night drops lows to the 50s for most of the area, with upper 40s in parts of the Alleghenies.
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.LONG TERM /WEDNESDAY THROUGH SUNDAY/... High pressure will build into the region and remain strong Wednesday through Saturday. Temperatures will be seasonable Wednesday, then again on Saturday, while in between on Thursday and Friday a Fall- chill with temperatures below average will be felt. Winds will be northeast Wednesday and Thursday with high pressure building into the region. Winds becoming southeast Friday and then southwest Saturday with light magnitudes.
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.AVIATION /18Z SUNDAY THROUGH FRIDAY/... VFR conditions are expected to prevail for the most part through Tuesday night as high pressure maintains control. Areas of fog are possible at most terminals tonight, and at CHO/MRB for Tuesday night. A few showers could approach CHO from Monday evening to Tuesday morning.
VFR conditions Wednesday through Thursday night. Winds northeast 10 knots Wednesday, then 5 to 10 knots at night. Winds remaining northeast 5 to 10 knots Thursday and Thursday night.
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.MARINE... High pressure over the region will maintain favorable marine conditions through Monday evening. A second, stronger Canadian high pressure starts to build into the area on Tuesday. The increasing pressure gradient on the southern side of the high will cause northeast to north winds to increase Monday night into Tuesday. SCA conditions are possible in the middle Chesapeake Bay Tuesday afternoon, then spreading north to most of the waters Tuesday night.
SCA conditions could continue Wednesday through Thursday night. Winds northeast gusting around 10 to 20 knots Wednesday and Wednesday night, then northeast around 10 to 15 knots Thursday and Thursday night.
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.LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None.
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SYNOPSIS...KRR NEAR TERM...KRR SHORT TERM...KRR LONG TERM...KLW AVIATION...KRR/KLW MARINE...KRR/KLW
NWS LWX Office Area Forecast Discussion