Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 290554 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 154 AM EDT TUE JUL 29 2014 .SYNOPSIS... HIGH PRESSURE WILL BUILD OVERHEAD THROUGH MIDWEEK...BRINGING PLEASANT WEATHER. A TROUGH OF LOW PRESSURE MAY DEVELOP TOWARD THE END OF THE WEEK. && .NEAR TERM /THROUGH TODAY/... HIGH PRES BLDG INTO THE MID ATLC OVERNIGHT. AT 2 AM AMAZINGLY PLEASANT OUTSIDE FOR JUL 29 - CLR SKIES...TEMPS IN M60S...DWPTS IN M50S. UPPER LOW WILL PERSIST TUESDAY AS SURFACE HIGH PRESSURE MOVES INTO THE REGION. NRLY WINDS WILL CONTINUE BRINGING UNSEASONABLY COOL TEMPS TO THE MID-ATLANTIC. FCST MAX TEMPS IN THE MID TO UPPER 70S ARE EXPECTED. && .SHORT TERM /TONIGHT THROUGH WEDNESDAY/... COOL CONDITIONS ARE EXPECTED TONIGHT INTO WEDNESDAY AS HIGH PRESSURE NEARS AND WINDS RELAX. FCST MIN TEMPS TUES NIGHT RANGE FROM THE UPPER 40S TO LOW 50S IN THE MTNS TO THE UPPER 50S NEAR INTERSTATE 95. HIGH PRESSURE PERSISTS ACROSS THE AREA WEDNESDAY. A FEW SHOWERS ARE POSSIBLE ACROSS THE POTOMAC HIGHLANDS WEDNESDAY AFTERNOON AS A DISTURBANCE MOVES AROUND THE UPPER LEVEL LOW. TEMPS WILL BE BELOW NORMAL BARELY REACHING 80 DEG. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... HIGH PRESSURE OFFSHORE SETS UP WEAK RETURN FLOW FOR THURSDAY AS LARGE COLD-CORE UPPER LOW OVER THE GREAT LAKES TO HUDSON BAY CONTINUES TO DOMINATE THE UPPER AIR PATTERN. MARINE WEDGE LOOKS TO BE IN PLACE FRIDAY INTO THE WEEKEND AT THE SURFACE WHILE SOUTHWEST FLOW ALOFT CONTINUES TO DRAW IN MORE DEEP LAYER MOISTURE. WEAK VORTS IN SOUTHWEST FLOW WILL DAILY CHANCES OF SHOWERS/STORMS IN THE FORECAST FRIDAY AND THE WEEKEND. THE BEST CHANCE WILL BE SATURDAY/SATURDAY NIGHT AS POSITIVELY TILTED SHORE WAVE TROUGH LIFTS NORTHEAST ACROSS THE OHIO VALLEY. ASSOCIATED WEAK COOL FRONT LOOKS TO PUSH THROUGH OR STALL FROM 00 TO 12Z SUNDAY. DEEP LAYER SHEAR LOOKS MINIMAL AT THIS TIME...HOWEVER MARGINAL TO MODERATE INSTABILITY WILL MAKE SOME CONVECTION POSSIBLE. AT THIS TIME...NO SEVERE WEATHER IS EXPECTED HOWEVER HEAVY RAIN IS A POSSIBILITY. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... VFR EXPECTED THROUGH TUESDAY. PATCHY FOG MAY IMPACT CHO-MRB EARLY WEDNESDAY MORNING. HIGH PRESSURE OFFSHORE WILL DRAW IN WARMER AND MORE HUMID CONDITIONS FRIDAY AND THROUGH THE WEEKEND...WHICH WILL RESULT IN DAILY CHANCES OF THUNDERSTORMS. THE BEST CHANCE WILL BE SATURDAY INTO SATURDAY NIGHT WITH A COLD FRONT. && .MARINE... SCA IN EFFECT FOR LOWR TIDAL PTMC AND SRN PART OF MD SXN OF CHES BAY THRU SUNRISE. HIGH PRESSURE WILL MOVE INTO THE REGION TUESDAY. NRLY WINDS 5-10 KTS EXPECTED TUESDAY AND WEDNESDAY ON THE WATERS. HIGH PRESSURE OFFSHORE WILL DRAW IN WARMER AND MORE HUMID CONDITIONS FRIDAY AND THROUGH THE WEEKEND...WHICH WILL RESULT IN DAILY CHANCES OF THUNDERSTORMS. THE BEST CHANCE WILL BE SATURDAY INTO SATURDAY NIGHT WITH A COLD FRONT. SOUTHERLY WINDS LOOK TO REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA THROUGH THE WEEKEND. && .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT EARLY THIS MORNING FOR ANZ532>534-537-540-541-543. SMALL CRAFT ADVISORY UNTIL 2 AM EDT EARLY THIS MORNING FOR ANZ535-536-542. && $$ UPDATE...WOODY! PRVS...BPP/HAS/AEB

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