Area Forecast Discussion
Issued by NWS Wakefield, VA

Home | Current Version | Previous Version | Text Only | 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 KAKQ 220750 AFDAKQ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE WAKEFIELD VA 350 AM EDT WED OCT 22 2014 .SYNOPSIS...
-- Changed Discussion --
LOW PRESSURE WILL INTENSIFY WHILE SLOWLY TRACKING NORTHEAST OFF THE MID ATLANTIC COAST TODAY THROUGH FRIDAY. COOL AND UNSETTLED CONDITIONS WILL PREVAIL TODAY...FOLLOWED BY DRIER CONDITIONS AND A SLOW WARMING TREND THURSDAY AND FRIDAY.
-- End Changed Discussion --
&& .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
LATEST ANALYSIS SHOWS ~1008 MB SFC LOW PRESSURE DEEPENING OFF THE SE VA/NE NC COAST...WITH STRONG UPPER LOW CENTERED OVER WEST CENTRAL VA. AREA OF SHOWERS OVERSPREADING PIEDMONT EARLY THIS MORNING UNDER THE COLD POOL ALOFT...WITH ANOTHER AREA OF SCATTERED SHOWERS AND TSTMS PUSHING OFF THE SE VA/NE NC COAST ASSOCIATED W/ SFC COLD FRONT AND WIND SHIFT BOUNDARY. LATEST RAP AND SPC MESOANALYSIS SHOWS CAPE ON THE ORDER OF 300-500 J/KG AS OF 07Z...SHIFTING OFFSHORE PRIOR TO 12Z SO WILL MAINTAIN MENTION OF TSTMS ALONG THE COAST THROUGH THAT TIMEFRAME. OTHERWISE...SHOULD BE TOO STABLE IN LOW LEVELS FOR ANY ADDITIONAL TSTMS. LATER TODAY...CLOSED UPPER LOW SLOWLY PUSHES ESE AND SHOULD BE CENTERED OFFSHORE BY 15-18Z. WILL CARRY LIKELY TO CATEGORICAL (60-80%) POPS OVER MUCH OF THE CWA THROUGH LATE MORNING AS DEEP MOISTURE AND LIFT WILL BE FAVORABLE THROUGH THIS PERIOD (CHC POPS ACRS SOUTH CENTRAL VA AND INTERIOR NE NC WHERE LESS MOISTURE RESIDES). AS THE UPPER LOW PIVOTS OFFSHORE...DRIER AIR ALOFT WILL MOVE INTO THE REGION AND SHOULD END MUCH CHANCE FOR MEASURABLE PRECIP THIS AFTN OVER SOUTH CENTRAL VA AND INTERIOR NE NC...WHILE FAVORABLE LIFT AND MOISTURE PERSIST OVER NE PORTIONS OF THE CWA. WILL MAINTAIN LIKELY TO CAT POPS ON THE ERN SHORE THROUGH THE AFTN...TAPERED TO 20% OR LOWER FROM SW SIDE OF METRO RICHMOND ON SW. CLOUDS WILL BE SLOW TO BREAK UP HOWEVER...MAY SEE SOME PEEKS OF SUN ACRS SOUTH CENTRAL VA BY MID-LATE AFTN BUT OVERALL IT WILL STAY BKN/OVC. FAVOR COOLER END OF GUIDANCE FOR HIGHS...GENLY NO BETTER THAN THE LOWER 60S OVER MOST AREAS..RANGING FROM LWR TO MID 60S ACRS THE FAR SOUTH...TO THE UPPER 50S/AROUND 60 F OVER THE NORTHERN ZONES FROM CAROLINE COUNTY ON WEST. OTHER FEATURE TO NOTE WILL BE THE INCREASING NW WINDS BY AFTN AS THE SFC LOW INTENSIFIES FAIRLY RAPIDLY OFF THE COAST. GUSTS TO 25-35 MPH WILL BE POSSIBLE BY LATER AFTN/EVENING (ESPECIALLY NEAR THE COAST). THE CLOSED LOW MOVES FARTHER NE TONIGHT. HIGH CHC TO LIKELY POPS WILL BE CONFINED TO THE ERN SHORE THIS EVENING...GENLY ONLY 20% POPS OR LOWER ELSEWHERE AFTER 00Z. DECREASING CLOUDS ARE ALSO EXPECTED ACROSS INTERIOR VA/NC OVERNIGHT. REMAINING BREEZY TO WINDY ESP NE SECTIONS. LOWS IN THE LOW-MID 40S ALONG AND WEST OF I-95 TO THE LOW 50S NEAR THE COAST.
-- End Changed Discussion --
&& .SHORT TERM /THURSDAY THROUGH FRIDAY/...
-- Changed Discussion --
PRESSURE GRADIENT WILL REMAIN TIGHT IN BETWEEN SUB 1000 MB SFC LOW OFF LONG ISLAND AND 1020 MB SFC HIGH OVER THE OH/TN VALLEY. EXPECT BREEZY TO WINDY CONDITIONS WITH GUSTS TO 35 MPH ACRS THE ERN SHORE...25-30 MPH ELSEWHERE. A 20% POP WILL BE MAINTAINED FOR THE ERN SHORE...DRY ELSEWHERE. STILL ENOUGH RESIDUAL LOW LEVEL MOISTURE AND A COLD POOL ALOFT FOR SKIES TO AVG OUT MOSTLY CLOUDY N/E TO PARTLY SUNNY S/W (MAYBE MOSTLY SUNNY OVER THE FAR SW). HIGHS IN THE UPPER 50S/AROUND 60 F ON THE MD ERN SHORE...TO THE MID-UPPER 60S SW. LOW PRESSURE MOVES FARTHER NE AND AWAY FROM THE LOCAL AREA ON FRIDAY ALLOWING FOR MAINLY SUNNY CONDS...DIMINISHING WINDS...AND MILDER TEMPS. HIGH FRIDAY IN THE MID 60S NE TO AROUND 70 F SW.
-- End Changed Discussion --
&& .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... LOW PRESSURE LIFTS WELL TO THE NE FRIDAY NIGHT AND SATURDAY AS UPPER RIDGING EXPANDS EASTWARD FROM THE CENTRAL US. A WEAK TROUGH CLIPS THE NRN MID-ATLANTIC SATURDAY NIGHT AND QUICKLY MOVES OFF THE COAST SUNDAY. A HIGH AMPLITUDE MID/UPPER LEVEL RIDGE BUILDS OVER THE ERN US MONDAY AND TUESDAY...WITH THE AXIS SHIFTING OFFSHORE BY MIDWEEK. GIVEN THIS...DRY CONDITIONS WILL PREVAIL THROUGH THE MEDIUM RANGE PERIOD. HIGH TEMPERATURES SHOULD AVERAGE IN THE UPPER 60S TO AROUND 70 SATURDAY AND SUNDAY...AND TREND UPWARD INTO THE LOW/MID BY MONDAY AND TUESDAY (PERHAPS WARMER TUESDAY). LOWS SHOULD AVERAGE FROM THE LOW/MID 40S NW...TO THE LOW/MID 50S FOR SE COASTAL LOCATIONS. && .AVIATION /08Z WEDNESDAY THROUGH SUNDAY/... LO PRES WILL DEVELOP OFF THE NRN MID ATLC CST THIS MORNG...THEN WILL CONTINUE TO INTENSIFY AS IT MOVES SLOWLY NE OFF THE NEW ENGLAND AND CANADIAN MARITIMES CSTS TODAY THRU FRI. UPR LVL LO WILL SWING OVR THE AREA THEN OFF THE CST TODAY INTO THIS EVENG...BRINGING LWR CIGS (MVFR/POSSIBLY IFR) AND -RA TO THE TAF SITES. NW OR N WINDS WILL PICK UP LATER THIS MORNG AND REMAIN RATHER STRONG AND GUSTY INTO TNGT MOST TAF SITES. -RA WILL LAST THE LONGEST OVR THE LWR MD/VA ERN SHR. BREEZY/WINDY OVR ERN HALF OF THE REGION THRU THU...AS STRONG LO GRADUALLY MOVES AWAY TO THE NE. COULD STILL BE SHOWERS OVR LWR MD (SBY) ALSO. HI PRES AND DRY CONDITIONS WILL PREVAIL FOR FRI AND SAT. && .MARINE... AS A COLD FRONT AND SCATTERED SHOWERS MOVE THROUGH THE MARINE AREA...WINDS HAVE INCREASED TEMPORARILY. MWS ISSUED FOR BRIEF GUSTS TO 20 KNOTS IN THE CHESAPEAKE AND PORTIONS OF THE EASTERN VIRGINIA RIVERS. THESE WINDS SHOULD SUBSIDE BEFORE INCREASING ONCE AGAIN DURING THE PRE DAWN HOURS. PREVIOUS DISCUSSION... A COLD FRONT WILL SLOWLY CROSS THE MID ATLANTIC COAST TONIGHT... WITH LOW PRESSURE INTENSIFYING OFF THE NORTHEAST COAST WEDNESDAY AFTERNOON INTO WEDNESDAY NIGHT. THIS WILL PRODUCE SCA CONDITIONS BEGINNING WEDNESDAY AFTERNOON FOR MOST OF THE AREA AND CONTINUING INTO AT LEAST THURSDAY. THE CURRENT FORECAST WIND IS GENERALLY 20-25KT...WITH GUSTS TO AROUND 30KT FOR MOST OF THE MARINE AREA. THERE IS A POTENTIAL FOR LOW-END GALE CONDITIONS LATE WEDNESDAY AFTERNOON INTO WEDNESDAY EVENING PRIMARILY SUPPORTED BY THE 21/12Z NAM. AT THIS TIME THE CURRENT SCA WAS MAINTAINED GIVEN THE POTENTIAL FOR ONLY MARGINAL GALE CONDITIONS...WITH AN ONSET GENERALLY AT OR BEYOND 24HR FROM 4PM TUESDAY. THIS SYSTEM IS EXPECTED TO STALL OFFSHORE THURSDAY NIGHT AND FRIDAY WITH SCA CONDITIONS LIKELY CONTINUING...ESPECIALLY FOR THE OCEAN. WITH THE FLOW BEING OFFSHORE FROM THE NW...SEAS WOULD TEND TO STAY CAPPED AT 5-7 FT AND TIDAL FLOODING IS NOT EXPECTED. N/NW FLOW IS EXPECTED TO CONTINUE INTO NEXT WEEKEND WITH SPEEDS DIMINISHING TO 10-15KT AND SEAS SUBSIDING. && .AKQ WATCHES/WARNINGS/ADVISORIES... MD...NONE. NC...NONE. VA...NONE. MARINE...SMALL CRAFT ADVISORY FROM 1 PM THIS AFTERNOON TO 5 PM EDT THURSDAY FOR ANZ630>638-650-652-654-656-658. && $$ SYNOPSIS...JDM NEAR TERM...LKB SHORT TERM...JDM/LKB LONG TERM...AJZ AVIATION...TMG MARINE...AJZ/LSA

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