Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 271346 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 946 AM EDT THU AUG 27 2015 .SYNOPSIS... HIGH PRESSURE WILL BUILD OVERHEAD THROUGH TONIGHT. THE HIGH WILL MOVE OFF THE COAST FRIDAY AND REMAIN OVER THE ATLANTIC DURING THE WEEKEND THROUGH THE MIDDLE PORTION OF NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/...
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HIGHER PRESSURE CONTINUES TO MOVE INTO THE MID-ATLANTIC THIS MORNING. NRLY WINDS 10-15MPH WILL CONTINUE THIS MORNING AND SUBSIDE BY THIS AFTERNOON AS HIGH PRESSURE MOVES OVERHEAD. MORE DRY CONDITIONS ARE EXPECTED ALONG WITH SUNSHINE AND LOW HUMIDITY. MAX TEMPS WILL RANGE FROM THE UPPER 60S AND LOWER 70S ALONG THE RIDGE TOPS OF THE ALLEGHENY AND POTOMAC HIGHLANDS TO THE LOWER 80S IN WASHINGTON AND BALTIMORE. MIN TEMPS TONIGHT WILL RANGE FROM THE 50S AND 60S IN THE ALLEGHENY HIGHLANDS AND SHENANDOAH VALLEY TO THE MID AND UPPER 60S IN DOWNTOWN WASHINGTON AND BALTIMORE.
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&& .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... HIGH PRESSURE WILL SHIFT TO OUR EAST FRIDAY AND IT WILL REMAIN OFF TO OUR EAST THROUGH SATURDAY NIGHT. A SOUTHERLY FLOW WILL DEVELOP DURING THIS TIME. THE SOUTHERLY FLOW ALONG WITH SUNSHINE WILL ALLOW FOR WARMER AND SLIGHTLY MORE HUMID CONDITIONS...BUT THE OPPRESSIVE HUMIDITY SHOULD REMAIN TO OUR SOUTH. AN ISOLATED THUNDERSTORM CANNOT BE RULED OUT SATURDAY AFTERNOON AND EVENING...ESPECIALLY OVER THE HIGHER TERRAIN. EVEN ACROSS THESE AREAS MOST OF THE TIME WILL BE DRY. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... REGION REMAINS ON WESTERN PERIPHERY OF SFC HIGH PRESSURE SUN MORNING WITH A RIDGE WORKING TO BUILD IN ALOFT. GENERALLY DRY CONDITIONS...THOUGH WITH RETURN FLOW...INCRSG MOISTURE AND WARM AIR ADVECTION COULD SEE ISO SHOWERS/TSTMS POP UP OVER THE HIGHER TERRAIN OF WV/VA. A SHORTWAVE MVG THRU COULD AID IN ANY DEVELOPING CONVECTION. PCPN TAPERS OFF OVERNIGHT...WITH MONDAY BEING A NEAR REPEAT OF SUNDAY WITH THE REGION STILL ON THE WESTERN PERIPHERY OF HIGH PRESSURE. WILL CONTINUE WITH SLIGHT CHC POPS FOR THE WESTERN AREAS MON AFTN/EVENING. THERE REMAINS SOME QUESTION ON THE HANDLING OF SYNOPTIC FEATURES TUES AND WED WITH THE 00Z MODEL SUITE. FOR NOW WILL GO WITH A MAINLY DRY FORECAST UNDER A BUILDING RIDGE AND SLIGHTLY ABOVE NORMAL TEMPS. && .AVIATION /14Z THURSDAY THROUGH MONDAY/... VFR CONDITIONS ARE EXPECTED THROUGH THIS EVENING. PATCHY BR MAY BRIEFLY REDUCE VSBYS LATE TONIGHT INTO EARLY FRIDAY MORNING. SOUTHERLY WINDS WILL DEVELOP AROUND DEPARTING HIGH PRESSURE LATER FRIDAY THROUGH SATURDAY. VFR CONDITIONS WILL PERSIST FOR MOST OF THE TIME...BUT PATCHY BR MAY BRIEFLY REDUCE VSBYS LATE FRIDAY NIGHT INTO EARLY SATURDAY MORNING. GENERALLY VFR CONDITIONS SUN THRU WED. LOW CONFIDENCE ATTM OF ISO TSTMS EACH DAY. && .MARINE... HIGH PRESSURE WILL BUILD OVER THE WATERS TODAY THROUGH TONIGHT. NORTH TO NORTHWEST WINDS ARE EXPECTED AHEAD OF THE HIGH. THE HIGH WILL MOVE OFF TO THE EAST FRIDAY AND SOUTHERLY WINDS WILL DEVELOP. SOUTHERLY WINDS WILL CONTINUE THROUGH SATURDAY NIGHT. WINDS SHOULD REMAIN BELOW SCA CRITERIA DURING THIS TIME...BUT IT MAY BE CLOSE FOR MIDDLE PORTIONS OF THE BAY DUE TO SOUTHERLY WINDS CHANNELING. SUB-SCA CONDITIONS INITIALLY SUN. PSBL SCA GUSTS MID CHESAPEAKE BAY BRIEFLY SUNDAY EVENING. GENERALLY SUB-SCA CONDITIONS THEN MON. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ SYNOPSIS...BJL NEAR TERM...BJL/HAS SHORT TERM...BJL LONG TERM...SEARS AVIATION...BJL/SEARS MARINE...BJL/SEARS

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