Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 280112 AAA AFDLWX AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 912 PM EDT THU AUG 27 2015 .SYNOPSIS...
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HIGH PRESSURE WILL BUILD OVERHEAD THROUGH TONIGHT. THE HIGH WILL MOVE OFF THE COAST FRIDAY NIGHT AND REMAIN OFFSHORE THROUGH THE EARLY PART OF NEXT WEEK.
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&& .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
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CLEAR AND CALM TONIGHT UNDER BUILDING HIGH PRESSURE. SINCE NO FOG DEVELOPED LAST NIGHT WILL GO WITH PERSISTENCE AND REMOVE IT FROM FCST. LOWS MID 50S TO LOW-MID 60S URBAN AREAS.
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&& .SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/... HIGH PRESSURE STAYS IN CONTROL FRIDAY AS THE CENTER MOVES OFF THE EAST COAST. WINDS WILL BECOME S-SE BY FRIDAY AFTERNOON. DEWPTS WILL BEGIN TO RISE BUT SLOWLY. AN ISOLATED SHOWER MAY REACH THE VA HIGHLANDS FRIDAY AFTERNOON BUT CONFIDENCE IS LOW AT THIS TIME. OVERALL...DRY CONDITIONS WILL PERSIST FRIDAY. && .LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
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NO PROBS XPCTD AS WE MOVE INTO THE LAST WKND OF AUG. HIGH PRES WL BE MIGRATING FM THE UPR MIDWEST ACROSS THE MID ATLC...MODIFYING THE AIR MASS SO THAT THE AREA XPRNCS INCSRG HUMIDITY/TEMPS OVR THE WKND. HIGHS 85-90. LOWS 65-70. SLT CHC OF AFTN TSTMS OVR THE MTNS. SUNDAY THROUGH THURSDAY...GFS AND ECMWF DIFFER ON SOLUTIONS FOR THE PERIOD OTHER THAN GENERAL RIDGING OVER REGION AND APPROACH OF ERIKA NEAR END OF PERIOD. ECMWF SUGGESTS MODERATE PVA TO SUPPORT STORM DEVELOPMENT DURING EARLY HALF OF PERIOD AND A WEAKER ERIKA WHILE GFS SHOWS WEAKER SUPPORT FOR STORM DEVELOPMENT A STRONGER ERIKA. LEANING TOWARDS GFS SOLUTION BUT HAVE LOW CONFIDENCE ON TIMING OF ANY STORM ACTIVITY.
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&& .AVIATION /01Z FRIDAY THROUGH TUESDAY/... VFR CONDITIONS EXPECTED TODAY THROUGH FRIDAY. N WINDS 5-10KTS WILL BECOME VARIABLE OVERNIGHT. PATCHY FOG MAY FORM AT MRB LATE TONIGHT INTO FRIDAY MORNING BUT SHOULD NOT IMPACT TERMINALS. WINDS BECOME S- SE FRIDAY 5-10KTS. VFR CONDS XPCTD OVR THE WKND. && .MARINE... N WINDS 10-15KTS WILL SUBSIDE TONIGHT AS HIGH PRESSURE MOVES OVER THE WATERS. WINDS WILL BECOME S-SE FRIDAY. WINDS XPCTD TO RMN BLO SCA VALUES THIS WKND. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ SYNOPSIS...ABW NEAR TERM...LFR SHORT TERM...ABW LONG TERM...CEM AVIATION...CEM/LFR/ABW MARINE...CEM/LFR/ABW

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