Area Forecast Discussion
Issued by NWS Sterling, VA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
059 FXUS61 KLWX 271433 AAA AFDLWX Area Forecast Discussion...UPDATED National Weather Service Baltimore MD/Washington DC 1033 AM EDT Sat Aug 27 2016 .SYNOPSIS... High pressure centered over eastern Quebec will move off of the New England coast Sunday. A cold front will move through the area during the second half of the week. && .NEAR TERM /THROUGH TONIGHT/... Ridge sfc and aloft will continue to build over the region through early Sun largely suppressing convective development. Still, can`t completely rule out a shower/t-storm over the Appalachians mtns. Still hot today with temps a deg or two cooler than yday east of the Blue Ridge mtns, however, wrn areas such as CBE, W99, MRB and HGR will see a light southeast wind develop during the afternoon resulting in downslope warming in those areas with temps 2-5 degs warmer than yday. && .SHORT TERM /SUNDAY THROUGH TUESDAY/... Sunday will feature easterly flow on the southwest flank of the high over northeastern New England and southeastern Canada with some potential for low clouds and fog. This should give way to sun as the ridge aloft will remain overhead. Risk of any convection confined to the very far western reaches of the CWA and it is slight. Highs cool a little more with the easterly flow and potential for clouds but still hot most places by afternoon. Sunday night is quiet, but Monday a shortwave will approach from the northwest accompanied by a cold front. Think most convection will remain in the NW portion of the CWA and points NW from there but could be a shower or t-storm that makes it to the metro during Monday night. Monday will also be a little hotter and more humid just ahead of the front. Not expecting heat advisory criteria howerver. && .LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/... Tuesday will be another warm one with high pressure remaining over the region. This will likely continue into Wedensday. Isolated thunderstorms will be possible each day. Change in the form of an upper level trof/surface front looks to move into the region for Thursday and Friday. By Friday expect to see highs back into the lower 80s..which is closer to normal for early Sept. However the cooling looks like it will only be temporary as the trof moves offshore next Saturday and ridging returns. && .AVIATION /15Z SATURDAY THROUGH WEDNESDAY/... More of the same tomorrow though some potential for low clouds at the major terminals early in the morning. Will have to watch this closely but right now odds appear low. No risk of storms thru early Monday. Cold front may bring a stray storm into the area late Monday. Isolated thunderstorms possible at TAF sites Tuesday and Wednesday. && .MARINE... Light winds and no risk of storms through early Monday. Risk of storms increases late Monday into Monday evening. Isolated thunderstorms will be possible on the waters Tuesday and Wednesday. && .CLIMATE... High temperature record tied Friday at IAD with a reading of 95 degrees. This was previously reached in 1998..1993 and 1975. Ranking of summer 2016 in terms of average temperature (JUN 1 - AUG 26) Site RankAverage Temperature DC 3 80.5 Balt 19 77.2 IAD 3 77.3 && .LWX WATCHES/WARNINGS/ADVISORIES... DC...None. MD...None. VA...None. WV...None. MARINE...None. && $$ SYNOPSIS...RCM NEAR TERM...LFR SHORT TERM...RCM LONG TERM...ABW AVIATION...LFR/ABW MARINE...LFR/ABW CLIMATE...RCM/ABW is the U.S. government's official web portal to all federal, state and local government web resources and services.