Area Forecast Discussion
Issued by NWS Sterling, VA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KLWX 280753 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 353 AM EDT TUE APR 28 2015 .SYNOPSIS...
-- Changed Discussion --
HIGH PRESSURE WILL BUILD INTO THE AREA TODAY. LOW PRESSURE WILL IMPACT THE REGION THURSDAY AND FRIDAY. HIGH PRESSURE WILL RETURN FOR THE WEEKEND.
-- End Changed Discussion --
&& .NEAR TERM /TODAY/...
-- Changed Discussion --
W.V. IMGRY SHOWS THE UPR TROF IS MOVG THRU THE MID ATLC - PRSNTLY BRINGING 050-100 FT CLDS ACROSS THE NRN 1/3 OF THE AREA. THESE WL BE TRACKING S THRU THE RMNDR OF THE OVRNGT HRS. HIGH PRES OVR THE UPR MIDWEST WL BE BLDG INTO THE FCST AREA TDA. SKIES SHOULD BE P SUN...CLRG LATE THIS AFTN. HIGH TEMPS WL MAINLY BE IN THE M60S.
-- End Changed Discussion --
&& .SHORT TERM /TONIGHT THROUGH WEDNESDAY/...
-- Changed Discussion --
LOW PRES WHICH HAS BEEN SPINNING IN THE GULF OF ME FOR THE PAST 2 DAYS WL BE MOVG VERY SLOWLY FURTHER OUT TO SEA AS HIGH PRES MOVES CLOSER TO THE E CST. THIS WL PROVIDE A MAINLY CLR OVRNGT. MAJORITY OF THE FCST WL SEE LOWS IN THE 40S...L50S IN THE CITIES..MU30S IN THE HIGHLANDS. MID ALTC RMNS IN BTWN SYSTEMS WED. CLDS WL LKLY BE ON THE INCRS BY AFTN AS THE NEXT LOW PRES AREA OVR THE GULF STATES BECOMES BETTER ORGANIZED. HIGHS WL BE NEAR CLIMO NORMS FOR THE END OF APR W/ HIGHS A70.
-- End Changed Discussion --
&& .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
-- Changed Discussion --
ALTHOUGH SUBSTANTIALLY LESS POTENT A SYSTEM THAN THE 00Z RUN AT THIS TIME THE PREV NIGHT...THE RECENT RUN OF THE GFS STILL FAVORS A RELATIVELY STRONGER CLOSED LOW FROM THE GREAT LAKES AND OVER THE AREA TO CLOSE OUT THE WORK WEEK. THE DYNAMICS OF THIS FEATURE ARE LESS IMPACTFUL SINCE IT DOES NOT SYNC-UP W/ THE SRN STREAM MOISTURE THAT IT HAD EARLIER RUNS. BOTH THE GFS AND EURO ARE CLOSER IN SOLUTIONS NOW...W/ BETTER CONVERGENCE ON HANDLING THE MOISTURE OVER THE DEEP SOUTH - THE INITIAL WAVE THAT HAD BEEN PULLED NWD IN EARLIER RUNS BUT NOW BARELY CROSSING INTO SRN VA LATE WED/EARLY THU. HOWEVER...AS A BULK OF THIS FEATURE MOVES OFF THE CAROLINA COAST...AN UPPER VORT THAT THE EURO CONTINUES TO SHOW AS A WEAKER FEATURE - BEGINS TO PUSH INTO THE BACK SIDE OF THE OFFSHORE SYSTEM. A SOMEWHAT BRIEF CONNECTION IS THEN MADE BETWEEN THE TWO AND SOME SCATTERED BANDS OF LIGHT RAIN DEVELOP DURING THE DAY ON THU. THIS WOULD ALSO KEEP COOLER TEMPS AND CLOUDY SKIES OVER THE AREA FOR MUCH OF THE DAY. STRENGTHENING AS IT MOVES INTO THE ALREADY OFFSHORE LOW...THE TWO SYSTEMS WILL INTENSIFYING BUT WELL OFF THE MID ATLC COAST. WINDS WILL PICK UP QUICKLY BUT MAINLY OFF THE DELMARVA WATERS...TAPERING OFF TOWARD THE MID ATLC COASTAL ZONES. SOME SCATTERED SHOWERS MAY LINGER INTO FRI BUT DRIER AND COOLER AIR WILL BE WRAPPED BACK DOWN INTO THE AREA BEHIND THE EXITING SYSTEM. THIS SYSTEM WILL LIKELY CONTINUE ITS SLOW/STEADY PACE AWAY FROM THE COAST AND KEEP THE TRACK OF NW FLOW PULLING-IN SUBSEQUENT UPPER VORTS...ATTEMPTING TO SLIDE THEM OVER THE AREA INTO THE WEEKEND. NEAR ZONAL UPPER FLOW HOWEVER WILL QUICKLY PUSH FROM THE NRN PLAINS INTO THE GREAT LAKES...PUSHING AN IN-SITU UPPER RIDGE OVER THE AREA THIS SAT & SUN - BRINGING BACK A DECENT WARM-UP. HIGHS INTO THE EARLY PART OF NEXT WEEK ARE EXPECTED TO SLIDE BACK ABOVE AVG...W/ THE POTENTIAL FOR U70S/L80S SUN AND ESPEC ON MON.
-- End Changed Discussion --
&& .AVIATION /08Z TUESDAY THROUGH SATURDAY/...
-- Changed Discussion --
VFR CONDS XPCTD TDA THRU WED. NWRLY GUSTS TO A20 KTS AT BWI/DCA/ MTN THRU MID AFTN. NO PROBS XPCTD TNGT OR WED. BETTER CONFIDENCE THE PASSAGE OF AN UPPER LEVEL SYSTEM FROM THU INTO FRI. MAINLY SOME SCATTERED SHOWERS...CLOUDY SKIES AND SOME LOW-END NW BREEZES. POSSIBLE MVFR OR LOWER CONDS AT PEAK ON THU. CONDS IMPROVING FRI INTO WEEKEND.
-- End Changed Discussion --
&& .MARINE...
-- Changed Discussion --
SCA HAS BEEN XTND THRU ERLY AFTN FOR THE UPR PTMC. FOR THE LWR PTMC/BAY IT WL BE IN EFFECT THRU 4 PM. NO PROBS XPCTD TNGT OR WED. A POTENT LOW PRESSURE WILL AFFECT THE COASTAL WATERS LATE THIS WEEK...BUT MAINLY WELL OFFSHORE W/ LESSER EFFECTS BACK TOWARD THE MD CHES BAY AND TP RVR. PERIODIC SCA GUSTS FROM LATE WED INTO THU...THEN AGAIN ON FRI AND SAT AFTNS.
-- End Changed Discussion --
&& .LWX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 4 PM EDT THIS AFTERNOON FOR ANZ530>534-537>543. SMALL CRAFT ADVISORY UNTIL 1 PM EDT THIS AFTERNOON FOR ANZ535- 536.
-- End Changed Discussion --
&& $$ PRODUCTS...WOODY!/GMS

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.