Area Forecast Discussion
Issued by NWS Wakefield, VA

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000 FXUS61 KAKQ 070554 AFDAKQ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WAKEFIELD VA 154 AM EDT TUE JUL 7 2015 .SYNOPSIS... UNSETTLED WEATHER CONDITIONS WILL FINALLY COME TO AN END LATER TONIGHT AS A FRONTAL BOUNDARY LIFTS WELL NORTH OF THE AREA. ON TUESDAY...THERE WILL ONLY BE A SLIGHT CHANCE FOR LATE DAY SHOWERS AND THUNDERSTORMS...ALONG WITH HOTTER TEMPERATURES. A WEAK COLD FRONT IS EXPECTED TO STALL JUST NORTH OF THE AREA WEDNESDAY NIGHT INTO FRIDAY...AND WILL BRING THE CHANCE FOR SHOWERS AND THUNDERSTORMS. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... CURRENT WATER VAPOR IMAGERY AND NUMERICAL MODEL ANALYSIS INDICATES A REMNANT MID/UPPER TROUGH LIFTING NE OVER WRN PA/NRN WV...WITH SSW FLOW OVER THE MID ATLANTIC AHEAD OF THE TROUGH. AT THE SURFACE...A TROUGH EXTENDS FROM SE PA THROUGH ERN MD AND INTO ERN VA. THIS HAS BEEN A FOCAL POINT FOR SCT SHOWERS/TSTMS THROUGH THE EVENING. AS OF 0945 PM...THE GREATEST CONCENTRATION OF SHOWERS/TSTMS LOCALLY IS ACROSS INTERIOR PORTIONS OF THE TIDEWATER. A VERY MOIST AIRMASS REMAINS IN PLACE WITH DEWPOINTS OF 70-75 F AND SATELLITE DERIVED PW VALUES ~1.8 IN. HENCE..LOCALLY HEAVY RAIN AGAIN WILL BE THE PRIMARY CONCERN. SOME VERY LOCALIZED MODESTLY STRONG WIND GUSTS ALSO POSSIBLE IN ANY STORMS BUT NO SEVERE WX IS EXPECTED AS EFFECTIVE SHEAR VALUES ARE FAIRLY LOW...LESS THAN 20 KT. LOWS TONIGHT RANGE FROM THE UPPER 60S NW TO THE LOWER 70S MOST OTHER AREAS. PATCHY FOG POSSIBLE OVERNIGHT BUT COVERAGE EXPECTED TO BE LIMITED AND LARGELY A RESULT OF WHERE THE HEAVIEST RAIN HAS FALLEN. && .SHORT TERM /6 AM THIS MORNING THROUGH THURSDAY/... THE PATTERN FINALLY LOOKS TO BE DRIER TUE...AS A STRONGER UPPER LEVEL LOW PUSHES EAST FROM CENTRAL CANADA AND ALLOWS THE UPPER LOW OVER OHIO/WV TO WEAKEN/BECOME ENGULFED INTO THE STRONGER MEAN FLOW. WEAK RIDGING ALOFT DEVELOPS ALONG/OFF THE SE AND MID ATLC COAST AND LOW LEVEL FLOW TURNS MORE TO THE SSW. ALONG WITH RISING 850 MB TEMPS AND INCREASING AMTS OF SUNSHINE...EXPECT MORE TYPICAL SUMMERTIME HEAT WITH HIGH TEMPS INTO THE LOWER 90S MOST AREAS (FOR NOW STAYED A TAD BELOW GUIDANCE FOR HIGHS DUE TO THE VERY MOIST ANTECEDENT CONDS). HI TEMPS AT THE IMMEDIATE COAST WILL BE IN THE 80S. WILL MAINTAIN A 20% POP IN THE MID/LATE AFTN/EARLY EVENING PERIOD MOST PLACES...EVEN THOUGH FORCING IS WEAK. WARM/HUMID TUE NIGHT WITH LOWS IN LOWER TO MID 70S. WED XPCD TO BE RAIN-FREE INTO THE MID AFTN...BEFORE A CDFNT FM THE NW DRIFTS CLOSER...COMBINING W/ HEATING COULD RESULT IN LATE DAY STORMS...ESPECIALLY ACRS THE NRN 1/2 OF THE CWA. WILL HAVE 20% POPS SOUTH TO 40% NORTH IN THE LATE AFTN/EVENING. HIGHS UPPER 80S/AROUND 90 F FAR N...TO THE LOWER-MID 90S ELSEWHERE (LOCALLY 85-90 F AT THE BEACHES). HEAT INDICES NEAR 100 F. MODELS SHOW SOME CONTINUED SHORTWAVE ENERGY OVERNIGHT ACRS THE NE ZONES...AND WILL MAINTAIN CHC POPS INTO EARLY AM HRS THU THERE. LOWS 70-75 F. CONTINUED HOT THU...HIGHS AGAIN 90-95 F (THOUGH AGAIN WILL STAY ON COOL SIDE OF GUIDANCE FOR HIGH TEMPS). && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... SERN U.S. H5 RIDGE WILL GRADUALLY BUILD WEST INTO THE SOUTHERN PLAINS THIS WEEKEND. THIS WILL ALLOW NW FLOW TO DEVELOP OVER THE MID- ATLANTIC REGION BY LATE WEEK INTO THE WEEKEND...WITH A SERIES OF DISTURBANCES DIVING SOUTH. TIMING OF THESE FEATURES WILL BE DIFFICULT...SO MAINLY WENT WITH TYPICAL DIURNAL TSTM POPS OF 20-30% EACH AFTN/EVE THROUGH THE WEEKEND. SEASONABLE TEMPS ARE EXPECTED THROUGH THE PERIOD WITH LOWS IN THE UPR 60S TO MID 70S...AND HIGHS IN THE UPR 80S TO LOW 90S...EXCEPT LOW/MID 80S AT THE BEACHES. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... VFR CONDITIONS ACROSS AREA TERMINALS EARLY THIS MORNING, WITH MAINLY VFR CONDITIONS EXPECTED TO PERSIST THROUGH THE DAY ON TUE. HAVE ACCOUNTED FOR A BRIEF WINDOW OF MVFR TO LCL IFR CONDITIONS AT NORTHERN TERMINALS (KRIC/KSBY) JUST BEFORE SUNRISE. HOWEVER, DO ANTICIPATE A QUICK RETURN VFR CONDS BY MID MORNING WITH A MUCH LOWER CHC OF CONVECTION TUE AFTN/EVENING. A MORE TYPICAL SUMMER PATTERN EXPECTED FOR THE MID TO LATE WEEK PERIOD, AS A WEAK COOL FRONT WILL AGAIN APPROACH THE AREA, ONLY TO STALL JUST NORTH OF THE LOCAL AREA. TYPICAL SUMMERTIME ISOLATED LATE AFTN/EVENING TSTMS POSSIBLE WED-THU, CLEARING OVERNIGHT. OUTSIDE OF CONVECTION, MAINLY VFR CONDITIONS EXPECTED. HOWEVER, WL ALSO NEED TO WATCH FOR MORE OF THE SAME LATE NIGHT/EARLY MORNING LOW CLOUDS/VIS RESTRICTIONS FOR THE MID TO LATE WEEK PERIOD. && .MARINE... RELATIVELY BENIGN BOATING CONDITIONS ARE EXPECTED TONIGHT THRU THE COMING WEEKEND AS A MORE TYPICAL SUMMERTIME PATTERN DEVELOPS. ISOLD TSTMS WILL BE POSSIBLE EACH AFTN...BUT SCA CONDITIONS ARE NOT ANTICIPATED. SEAS WILL REMAIN GENERALLY 2-4 FT. WAVES ON THE CHES BAY 1-2 FT. && .AKQ WATCHES/WARNINGS/ADVISORIES... MD...NONE. NC...NONE. VA...NONE. MARINE...NONE. && $$ SYNOPSIS...LKB NEAR TERM...AJZ/LKB SHORT TERM...ALB/LKB LONG TERM...JDM AVIATION...MAM MARINE...JDM/TMG

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