Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 160110 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 910 PM EDT FRI AUG 15 2014 .SYNOPSIS...
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HIGH PRESSURE WILL BUILD OVERHEAD TONIGHT BEFORE MOVING OFF THE COAST LATER SATURDAY AND SUNDAY. LOW PRESSURE WILL PASS THROUGH THE AREA MONDAY INTO TUESDAY AND THE COLD FRONT ASSOCIATED WITH THE LOW WILL STALL OUT NEAR THE AREA DURING THE MIDDLE PORTION OF NEXT WEEK.
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&& .NEAR TERM /THROUGH SATURDAY/...
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WK S/WV SPREAD SOME CLDS INTO AREA JUST PRIOR TO SUNSET. THESE SHUD DEPART TNGT...PROVIDING A MOCLR/CALM NGT AS HIPRES BLDS. DEWPTS A PINCH HIER THAN YDA...BUT STILL ATYPICALLY LOW FOR MID AUG IN THE MID ATLC. MIN-T TWEAKS FEW. LAMP AND THIS MRNGS LOWS WERE KEY CONSIDERATIONS. HIGH PRESSURE WILL STAY ACROSS THE AREA SATURDAY LEADING TO ANOTHER DRY SUNNY DAY FOR THE MID ATLANTIC. FCST MAX TEMPS WILL BE SLIGHTLY WARMER THAN TODAY...LOW TO MID 80S.
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&& .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/... HIGH PRESSURE WILL MOVE OFF THE COAST SATURDAY NIGHT AND SOUTHERLY WINDS WILL ALLOW MOISTURE TO INCREASE ACROSS THE MID ATLANTIC BY SUNDAY. A SHORTWAVE TROUGH WILL DROP INTO THE NORTHERN PLAINS/MIDWEST SUNDAY AND LOW PRESSURE WILL MOVE ACROSS THE MID WEST. A WEAK COLD FRONT WILL APPROACH FROM THE AREA SATURDAY NIGHT AND SHOWERS MAY MOVE INTO THE POTOMAC HIGHLANDS EARLY SUNDAY AND INTO THE AFTERNOON. COVERAGE SHOULD BE ISO-SCT AND WILL LIKELY DISSPATE AS IT MOVES EAST AND SOUTH. WENT WITH THE SREF MEAN FOR COVERAGE SUNDAY. LITTLE INSTABILITY WILL LIKELY LEAD TO SHOWERS WITH A SMALL CHANCE OF THUNDER. COVERAGE WILL DECREASE SUNDAY NIGHT AND INTO MONDAY. LOW PRESSURE WILL DEEPEN ACROSS THE MID WEST SUNDAY NIGHT AND APPROACH THE MID ATLANTIC BY MONDAY. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO ENTER THE HIGHLANDS MONDAY MORNING AND MOVE EASTWARD THROUGHOUT THE DAY. MOISTURE WILL INCREASE ACROSS THE REGION MONDAY AND HEAVY RAIN IS POSSIBLE MONDAY AFTERNOON INTO THE EVENING. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... 500MB SHORTWAVE CROSSING THE CWA MONDAY NIGHT THROUGH TUESDAY NIGHT. ANOTHER 500MB SHORTWAVE WILL MOVE FROM THE UPPER MISSISSIPPI VALLEY TUESDAY TO SOUTHERN ONTARIA/SOUTHWEST QUEBEC THROUGH FRIDAY. A SURFACE LOW CENTER OVER OHIO VALLEY WILL MOVE EAST ALONG A QUASI-STATIONARY BOUNDARY CROSSING THE CWA MONDAY NIGHT THROUGH TUESDAY NIGHT. GREATEST OPPORTUNITY FOR PRECIPITATION WILL OCCUR MONDAY MORNING THROUGH TUESDAY AFTERNOON. ANOTHER AREA OF PRECIPITATION MAY DEVELOP DURING THE LATER HALF OF THE WORKWEEK IN RESPONSE TO THE PASSAGE OF THE SECOND UPPER LEVEL DISTURBANCE. && .AVIATION /01Z SATURDAY THROUGH WEDNESDAY/...
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VFR THRU VALID TAF PD. EVE CLDS WL DSPT. FEW CLDS OVNGT-TMRW. LGT WNDS WL BECOME S/SWLY...BUT AOB 6 KT. SHRA POSSIBLE AT MRB SAT NIGHT-SUNDAY AS A COLD FRONT APPROACHES THE AREA. SHRA/TSRA ARE POSSIBLE MONDAY AS LOW PRESSURE APPROACHES FROM THE WEST. REDUCED CIGS/VSBYS POSSIBLE FOR THE START OF THE WORK WEEK.
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&& .MARINE...
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SLY CHANNELING HAS DVLPD THIS EVNG AHD OF A WK S/WV. WNDS SHUD REMAIN AOB 15 KT IN THE MID BAY...AND AOB 10 KT ELSW. WNDS WL SUBSIDE TWD DAWN FOR A FEW REASONS...ITS THE DIURNAL MIN...LULL FM DISTURBANCE WL BE DIRECTLY OVHD...AND SFC BLDG HIPRES. WNDS WL REMAIN LGT NWLY SAT MRNG AS SFC HIPRES CRESTS. WL RESUME S/SWLY FLOW LATER SAT INTO SUN. A COLD FRONT DROPS ACRS THE WATERS SUN NGT...W/ LOPRES TRACKING ALONG IT MON NGT INTO TUE. SINCE THESE FEATURES WL BE RELATIVELY CLOSE...WATERS SHUDNT BE SITUATED SUCH TO RECEIVE STRONG WNDS...OUTSIDE OF POTL GUSTS INVOF STORMS. THUS...SCA/S NOT ANTICIPATED ATTM.
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&& .LWX WATCHES/WARNINGS/ADVISORIES... DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...NONE. && $$ SYNOPSIS...HAS NEAR TERM...HTS/HAS SHORT TERM...HAS LONG TERM...CEM AVIATION...HTS/HAS MARINE...HTS

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