Area Forecast Discussion
Issued by NWS Sterling, VA

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716 FXUS61 KLWX 251817 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 217 PM EDT Tue Oct 25 2016 .SYNOPSIS... High pressure will remain over the region through Wednesday night. A cold front will cross the area Thursday afternoon and evening. High pressure returns Friday and Friday night. && .NEAR TERM /THROUGH TONIGHT/... High pressure will continue to build toward the region late this afternoon before settling overnight tonight. Breezy and cool conditions will continue through this afternoon...despite plenty of sunshine. High pressure settling overhead tonight will provide a good setup for radiational cooling. Leaned toward the colder side of guidance for this reason. Min temps will range from the mid to upper 20s in the Allegheny the lower and middle 30s across most other the lower 40s in downtown Washington and Baltimore. A Freeze Warning is in effect overnight for northern Maryland...portions of northern Virginia...eastern West Virginia and the Potomac Highlands of Virginia. A Frost Advisory is in effect for the Washington and Baltimore Metropolitan areas into portions of central Virginia. The Frost Advisory may need to be extended farther south into central Virginia...but confidence is too low at this time with an increasing cirrus deck expected across this area. && .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... High pressure will remain overhead for Wednesday...bringing more dry and cool conditions. However...high and mid-level clouds will increase well ahead of low pressure tracking through the Midwest. The low will track into the eastern Great Lakes Wednesday night while high pressure settles to our east. A return flow will setup and with more clouds around...min temps should be milder compared to Tuesday night. The cold front associated with the low will pass through on Thursday into Thursday evening...bringing some showers. Blustery and chillier conditions are expected behind the front overnight. && .LONG TERM /FRIDAY THROUGH TUESDAY/... High pressure will build over the region Friday into Saturday before another wave of low pressure passes to the north during the middle of the weekend. Similar to the Thursday system, most of the forcing looks to stay north and moisture return is meager at best. Not expecting much in the way of precipitation over the weekend with this second system as a result, but breezy conditions and a reinforcing shot of cool air can behind a secondary front expected. High pressure will return to the area early next week, but with the center of the ridging building to the south that should result in moderating temperatures. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... Wind gusts around 20 to 25 knots will quickly diminish around sunset. Light winds are expected tonight through Wednesday. Southerly winds will develop Wednesday night and increase for Thursday ahead of a cold front. A few showers are likely Thursday into Thursday evening. MVFR cigs are possible as well during this time. VFR conditions are expected behind the cold front late Thursday night with gusty northwest winds. Mainly VFR expected Friday-Saturday with northwesterly winds 10-15 knots. && .MARINE... Gusty winds this afternoon will gradually diminish tonight. High pressure will build over the waters late tonight through Wednesday before moving off the coast Wednesday night. Southerly winds will increase ahead of a cold front Thursday. The cold front will pass through Thursday evening and gusty northwest winds are expected behind the front overnight Thursday. A Small Craft Advisory will likely be needed for the waters Thursday through Thursday night. A Gale Warning may be needed for portions of the waters late Thursday and Thursday night. Small Craft Advisory conditions may persist into the first half of the weekend as a secondary frontal system crosses the area in response to low pressure passing to the north. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...Frost Advisory from 3 AM to 9 AM EDT Wednesday for DCZ001. MD...Freeze Warning from 3 AM to 9 AM EDT Wednesday for MDZ003>006- 501-502-507. Frost Advisory from 3 AM to 9 AM EDT Wednesday for MDZ011-013- 014-503>506-508. VA...Freeze Warning from 3 AM to 9 AM EDT Wednesday for VAZ027>031- 039-040-051-501-503>505. Frost Advisory from 3 AM to 9 AM EDT Wednesday for VAZ025-026- 038-050-052>054-502-506-507. WV...Freeze Warning from 3 AM to 9 AM EDT Wednesday for WVZ050>053- 055-501>506. MARINE...Small Craft Advisory until 3 AM EDT Wednesday for ANZ531>534- 537-539>543. Small Craft Advisory until 6 PM EDT this evening for ANZ530- 535-536-538. && $$ SYNOPSIS...BJL NEAR TERM...BJL SHORT TERM...BJL LONG TERM...DFH AVIATION...BJL/DFH MARINE...BJL/DFH is the U.S. government's official web portal to all federal, state and local government web resources and services.