Area Forecast Discussion
Issued by NWS Sterling, VA

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394 FXUS61 KLWX 230743 AFDLWX Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 343 AM EDT Fri Mar 23 2018 .SYNOPSIS...High pressure will build in from the west through Saturday. Low pressure will move from the mid-Mississippi valley Saturday to the southern Mid-Atlantic Saturday night. High pressure will follow for the beginning of next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... High pressure over the Mississippi River Valley will build east overnight and Friday. Skies will become sunnier with temperatures similar to Thursday`s high temperatures or a degree or two higher due to lack of cloud cover and snow pack. && .SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/... High pressure will remain in control Friday night allowing for clear skies and light winds. Temperatures will be about 10 degrees below average. Low pressure will be diving across the center of the region Saturday and Saturday night. Clouds will increase during the day. The NAM, European and GFS models are all indicating that precipitation, mainly in the form of snow, should stay well southwest of the Metro areas. Confidence that the northern edge of snow pushes into Northern and Northeast Virginia. No advisories, watches or warnings at this time due to this low confidence. Once the low pressure pushes into the central and eastern Carolinas, chilly high pressure will nose southward and provide reinforcing chilly air in behind the low pressure system. The below average temperatures will continue Sunday and Sunday night. && .LONG TERM /MONDAY THROUGH THURSDAY/... Strong high pressure for this late in the season will dominate the entire northeast and mid-atlantic through the first half of next week keeping temps cooler than normal. A slow frontal zone will approach the area from the west late in the week bringing the next chance of rain to the area. Due to the strong ridging to the north and east of the area, the timing of this frontal zone could be potentially delayed. Ensemble spaghetti plot showing a lot of uncertainty with the timing of this front into the area. Temperatures will start trending upward during the second half of next week as high pressure begins to weaken and winds turn more southerly or southwesterly. && .AVIATION /08Z FRIDAY THROUGH TUESDAY/... VFR conditions overnight through Sunday night. There could be a brief period of MVFR conditions Saturday afternoon and evening at the CHO terminal with a passing disturbance. Winds northwest around 15 knots gusts to 25 knots overnight and today. Winds northwest 5 to 10 knots tonight and Saturday, becoming northeast 5 to 10 knots Saturday night through Sunday night. VFR conditions Monday through Tuesday. && .MARINE... Small craft advisories are in effect through tonight. No marine hazards expected Saturday and Saturday night. Small craft advisories may be needed on Sunday. Winds northwest 10 knots gusts 20 to 25 knots overnight through tonight. Winds northwest becoming northeast 10 knots gusts 15 knots Saturday through Sunday. Winds northeast 10 to 15 knots gusts 20 knots Sunday night. Winds 12kt or less under strong high pressure. No SCA anticipated at this time Mon through Wed. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...Small Craft Advisory until 6 AM EDT Saturday for ANZ531>534- 537-539>541-543. Small Craft Advisory until midnight EDT tonight for ANZ536-538- 542. Small Craft Advisory from 9 AM this morning to midnight EDT tonight for ANZ530-535. && $$ SYNOPSIS...LFR NEAR TERM...KLW SHORT TERM...KLW LONG TERM...LFR AVIATION...LFR/KLW MARINE...LFR/KLW is the U.S. government's official web portal to all federal, state and local government web resources and services.