Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 291432 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 1032 AM EDT TUE JUL 29 2014 .SYNOPSIS... HIGH PRESSURE WILL BUILD OVERHEAD THROUGH MIDWEEK...BRINGING PLEASANT WEATHER. AN UPPER LEVEL TROUGH OF LOW PRESSURE MAY DEVELOP EAST OF THE MISSISSIPPI RIVER AT WEEK`S END. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... RECORD LOW TIED AT BWI/BALTIMORE THIS MORNING OF 59F. SOME DISCUSSION ON NWSCHAT THIS MORNING ABOUT THE POSSIBILITY OF HAZE FROM CANADIAN FIRES OVER THE AREA. ALSO BATTLING BORDERLINE SMALL CRAFT ADVISORY GUSTS ON THE BAY AND POTOMAC EARLY TODAY. SO FAR...JUST BELOW...BUT POSSIBLY COULD BE REISSUED FOR A SHORT TIME TODAY BEFORE WINDS DIMINISH. UPPER LOW WILL PERSIST OVER ONTARIO TODAY AS SURFACE HIGH PRESSURE MOVES INTO THE MID ATLC RGN. NRLY WINDS WILL BRING XTRMLY PLSNT WX TO THE MID-ATLANTIC. FCST MAX TEMPS IN THE MID TO UPPER 70S ARE EXPECTED. WHAT A DIFFERENCE 3 YRS MAKES: 7/29/11 HIGH TEMPS - DCA 104..IAD 103..BWI 101...ALL RECORDS FOR THIS DATE. && .SHORT TERM /6 PM THIS EVENING THROUGH WEDNESDAY NIGHT/... UPR LVL TROF WL CONT TO SPIN WHILE THE DESERT SW BAKES UNDER THE UPR RDG. FCST MIN TEMPS TONIGHT RANGE FROM THE UPPER 40S TO LOW 50S IN THE MTNS TO THE UPPER 50S NEAR INTERSTATE 95. HIGH PRES PERSISTS ACROSS THE AREA WED. ISOLD TRW ARE PSBL ACROSS THE POTOMAC HIGHLANDS WED AFTN AS A DISTURBANCE MOVES AROUND THE UPPER LEVEL LOW. HIGH TEMPS WILL RMN BLO NRML...BARELY REACHING 80 DEG. WED NGT CONTS TO BE VERY COMFORTABLE W/ LOWS IN THE 50S W OF I-95...MU60S IN THE CITIES AND ALONG THE BAY. && .LONG TERM /THURSDAY THROUGH MONDAY/... HIPRES WL REMAIN IN THE WRN ATLC THRU THE XTND PD...SUPPORTING SLY RETURN FLOW ACRS THE CWFA. ANOTHER KEY PLAYER IN THE WX PTTN FOR THE UPCOMING PD WL BE THE DP UPR LOW...WHICH WL REMAIN N OF THE GRTLKS THRU THE WK...EVOLVING INTO A SHARPLY AMPLIFIED TROF AXIS FOR THE WKND. THUS...WL BE TRANSITIONING FM A PD OF COOL/DRY WX TO A PD WHERE DAILY POPS NEED TO BE CONSIDERED. WL KEEP THU DRY DUE TO WLY FLOW ALOFT...THEN UPGLIDE/THTE/MSTR ADVCTN BECOME TOO MUCH TO IGNORE. SUSPECT WE/LL HV SOME PVA TOO BY THE WKND...BUT THATS TOO FICKLE TO TIME THIS FAR OUT. INSTBY REMAINS MODEST...BUT SHUD BE SUFFICIENT TO SUPPORT MAINLY DIURNAL THUNDER. WL KEEP SHRA FOR THE NIGHTTIME HRS. NORMAL HIGHS FOR ELY AUG UPR 80S...W/ LOWS ARND 70F IN THE URBAN DOWNTOWNS AND IN THE 60S OUTLYING AREAS. TEMP FCSTS THRUT THIS PD BLO NORMAL. THU MAY BE THE WARMEST DAY DUE TO INSOLATION AND LACK OF PCPN...BUT EVEN THEN MAXT MID 80S W/ DEWPTS IN THE 50S. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/... VFR EXPECTED TDA. PATCHY FOG MAY IMPACT CHO-MRB EARLY WEDNESDAY MORNING. THU...VFR UNDER HIPRES. FRI AND SAT...MAINLY VFR THO MAY HV LCL FLGT RESTRICTIONS IN SCT SHRA/TSRA. && .MARINE... BATTLING BORDERLINE SMALL CRAFT ADVISORY GUSTS ON THE BAY AND POTOMAC EARLY TODAY. SO FAR...JUST BELOW...BUT POSSIBLY COULD BE REISSUED FOR A SHORT TIME TODAY BEFORE WINDS DIMINISH. HIGH PRESSURE WILL MOVE INTO THE REGION TDA. NRLY WINDS 5-10 KTS XPCTD BY LATE TDA AND WED ON THE WATERS. HIPRES OFFSHORE WL PROVIDE GNLY LGT WNDS TO THE WATERS. SLY FLOW THU WL START TO BACK ELY FOR FRI-SAT. PROGGED SUSTAINED SPDS AOB 10 KT. NO HEADLINES ANTICIPATED THRU SAT. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ UPDATE...STRONG PRODUCTS...WOODY!/HTS

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