


Area Forecast Discussion
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
055 FXUS61 KLWX 070225 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 925 PM EST Thu Mar 6 2025 .SYNOPSIS... Gusty winds will continue through tonight between low pressure departing to the north and high pressure building in from the west. High pressure will pivot to the south Friday, then a weak area of low pressure will cross the region Friday night into Saturday. Another area of low pressure will pass to the south Sunday, then high pressure will return through the first half of next week. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Winds have been showing a gradual decrease since sunset with nocturnal cooling although wind fields aloft have been strengthening (40-50kt in the boundary layer per 00Z IAD sounding). Therefore, there could be sporadic punches of higher winds, especially in any higher elevations. Canceled lower elevation portions of the Wind Advisory earlier, with some additional trimming possible before the midnight expiration. Cold advection slows the second half of the night, which should weaken low level lapse rates and cause winds to diminish further. One exception may be the highest peaks as 850 mb winds remain 40-50 kt through daybreak. Cold advection stratocumulus/wave clouds have been retreating as well, and expect this trend to continue overnight. High clouds may start approaching from the southwest toward dawn. Low temperatures will be in the upper 20s to lower 30s with 20s in the mountains. Wind chill values will be about 5-10 degrees lower. && .SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/... High pressure will briefly pass to the south Friday. High and mid level clouds will increase Friday into Friday night as a weak wave of low pressure approaches from the west. The highest precipitation chances with this low will be along the MD/PA line and near/west of the Appalachians. Friday and Saturday both look breezy during the daylight hours when mixing increases, though not as windy as today (Thursday). && .LONG TERM /SUNDAY THROUGH THURSDAY/... As one low pressure system moves across New England and another moves across the Carolinas and offshore the East Coast Sunday night and Monday, high pressure will gradually build into the region from the southwest. Dry conditions are expected through this period with moderating temperatures. Highs Monday could reach the lower 70s. High pressure will continue to dominate Tuesday through Wednesday as well. Dry conditions and high temperatures reaching the middle 70s each day will be the story. A cold front could sag across the eastern Great Lakes Tuesday night through Wednesday, but is expected to stay well north of our region at this time. && .AVIATION /02Z FRIDAY THROUGH TUESDAY/... Overall winds have been trending downward this evening, but some rogue gusts of 30-40 kt could occur through midnight as wind fields remain strong aloft. Winds will gradually subside overnight, but bouts of breezy conditions are expected during the daytime hours Friday and Saturday out of the NW (though brief/lighter SW flow is anticipated Friday night). Remaining stratocumulus ceilings should scatter out overnight. VFR conditions are expected through the first half of the weekend, though some spotty light rain is possible late Friday night into Saturday. VFR conditions Sunday night through Monday night. Winds west less than 5 knots Sunday night. Winds west to northwest 5 to 10 knots Monday and Monday night. && .MARINE... While winds have been trending downward this evening, some occasional stronger gusts to gale force remain possible through the night as air temperatures cool below water temperatures and there are strong winds aloft that could mix down. Afterward, solid SCA conditions will likely linger through Friday in NW flow. Winds turn SW Friday night, then back to the NW Saturday with additional gusts of 15-25 knots possible. No marine hazards Sunday night through Monday night. Winds light and westerly less than 5 knots Sunday night. Winds west to northwest 10 knots Monday and Monday night. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...Gale Warning until 6 AM EST Friday for MDZ008. Wind Advisory until 1 AM EST Friday for MDZ001-501. Wind Advisory until midnight EST tonight for MDZ003>006-502- 503-505. VA...Wind Advisory until 1 AM EST Friday for VAZ503. Wind Advisory until midnight EST tonight for VAZ027-028-030- 031-504-505-507-508. WV...Wind Advisory until 1 AM EST Friday for WVZ501-503-505. Wind Advisory until midnight EST tonight for WVZ050>053-055- 502-504-506. MARINE...Gale Warning until 6 AM EST Friday for ANZ530>534-537-539>541- 543. Gale Warning until midnight EST tonight for ANZ535-536-538-542. && $$ SYNOPSIS...DHOF NEAR TERM...ADS SHORT TERM...DHOF LONG TERM...KLW AVIATION...ADS/KLW/DHOF MARINE...ADS/KLW/DHOF