984
FXUS61 KAKQ 102302
AFDAKQ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WAKEFIELD VA
702 PM EDT FRI MAY 10 2024
SYNOPSIS
AN UPPER LEVEL TROUGH WILL BRING ANOTHER ROUND OF SHOWERS AND
STORMS THIS AFTERNOON INTO TONIGHT. A CHANCE FOR SHOWERS
CONTINUES ACROSS MAINLY NORTHERN AREAS OVER THE WEEKEND. DRY AND
WARMER WEATHER TO START NEXT WEEK BEFORE ANOTHER ROUND OF
SHOWERS AND STORMS ARE POSSIBLE TUESDAY AND WEDNESDAY.
NEAR TERM /UNTIL 6 AM SATURDAY MORNING/
AS OF 230 PM EDT FRIDAY...
LOW PRESSURE IS NOW NEAR FARMVILLE, WITH A FRONTAL BOUNDARY
EXTENDING SE TO JUST SOUTH OF THE ALBEMARLE SOUND. THERE IS
ALSO ANOTHER BOUNDARY EXTENDING THROUGH THE RIC METRO INTO SE VA
WHICH IS ASSOCIATED WITH A WIND SHIFT FROM WESTERLY SOUTH OF
THE BOUNDARY WITH LOWER DEW POINTS, AND E-NE WINDS WITH HIGHER
DEW POINTS IN THE LOWER 60S NORTH OF THE BOUNDARY. THERE IS ALSO
A COLD FRONT EXTENDING SOUTHWARD FROM THE LOW INTO NC. SHOWERS
WITH EMBEDDED THUNDER HAVE POPPED UP ON THE COOL SIDE OF THE
BOUNDARY NORTH OF RICHMOND INTO THE PENINSULA WHERE THE HIGHER
THETA-E AIRMASS IS LOCATED, WHILE STORMS ARE DEVELOPING ALONG
THE COLD FRONT IN NC.
LATEST TRENDS IN THE HIGH RES GUIDANCE AGREE WITH THE IDEA THAT THE
MAJORITY OF THE STRONGER CONVECTION WILL STAY SOUTH OF THE
ALBEMARLE SOUND THIS EVENING (ALTHOUGH THE CAMS DO SUGGEST A
LOCALIZED STRONGER STORM ALONG OR NORTH OF THE BOUNDARY IN
VIRGINIA LATE THIS AFTERNOON). MLCAPE FORECAST VALUES MAY RAISE
TO 500 J/KG NEAR THE SOUND PER THE HRRR LATE THIS AFTERNOON AND
HAVE OPTED TO MAINTAIN LIKELY POPS NEAR THE SOUND ITSELF. WILL
GO WITH LIKELY POPS MAINLY ALONG/NORTH OF I-64 LATE THIS
AFTERNOON DUE TO THE FORCING FROM THE BOUNDARY AND SLIGHT
INSTABILITY OF 100-200 J/KG PER THE MESOANALYSIS. ALL OF THIS
SHOULD SHIFT OFFSHORE THIS EVENING AS THE LOW PRESSURE AND
FRONTAL BOUNDARIES MOVE EAST.
AS FOR THE SEVERE POTENTIAL, INSTABILITY IS THE MAIN LIMITING
FACTOR DESPITE EFFECTIVE SHEAR OF 50+ KT AND 70-90KT OF 500MB
FLOW. COULD NOT RULE OUT A SEVERE STORM LATE THIS AFTERNOON,
ESPECIALLY GIVEN THE LATEST RADAR TRENDS OVER THE PENINSULA.
SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/
AS OF 230PM EDT FRIDAY...
MUCH OF SATURDAY INTO EARLY AFTERNOON SHOULD STAY DRY AS A
WEAK UPPER DISTURBANCE CURRENTLY OVER THE WESTERN GREAT LAKES
APPROACHES THE AREA. MODELS ARE TRENDING SLIGHTLY SLOWER WITH
THE PRECIPITATION, WITH THE BEST CHANCES FOR RAIN ACROSS THE FAR
NW STARTING LATE SAT AFTERNOON, THEN SPREADING EAST DURING THE
EVENING. BEST CHANCES WILL BE ACROSS THE NORTHERN HALF OF THE
FORECAST AREA DUE TO THE BEST ENERGY STAYING WELL NORTH OF THE
REGION. THE UPPER LOW AND ASSOCIATED SURFACE REFLECTION WILL BE
SLOW TO MOVE OUT ON SUNDAY, WITH WRAP AROUND SHOWERS POSSIBLE
ACROSS MAINLY EASTERN VIRGINIA AND THE LOWER MD EASTERN SHORE.
MODELS ARE NOT TERRIBLY AGGRESSIVE WITH PRECIPITATION ON
SUNDAY, SO MANY PLACES WILL LIKELY BE DRY. TROUGH EXITS OFFSHORE
BY SUNDAY EVENING WITH DRY WEATHER EXPECTED SUNDAY NIGHT.
LONG TERM /MONDAY THROUGH FRIDAY/
AS OF 230 PM EDT FRIDAY...
OVERALL, THE EXTENDED WILL BE SEASONABLE ALTHOUGH THERE WILL BE RAIN
CHANCES THROUGHOUT THE WEEK. MONDAY WILL BE THE ONLY DAY OF THE WEEK
WITH NO CHANCES FOR RAIN WITH RIDGING ALOFT AND AT THE SURFACE. RAIN
CHANCES INCREASE FOR TUESDAY AND ESPECIALLY ON WEDNESDAY AS THE
CLOSED LOW CURRENTLY OVER THE SW STATES MOVES EAST AND IMPACTS
THE REGION. DOES NOT LOOK LIKE HEAVY RAINFALL AS THERE WILL NOT
BE AN OPPORTUNITY TO TAP INTO GULF OF MEXICO MOISTURE, BUT MOST
AREAS SHOULD SEE A QUARTER TO A HALF AN INCH OF RAIN. WEAK
RIDGING BUILDS IN ON THURSDAY WHICH MAY ALLOW FOR A DRY DAY.
WILL HOLD ONTO 20 POPS IN CASE OF AN AFTERNOON/EVENING SHOWER OR
STORM. ANOTHER BETTER CHANCE FOR RAIN ON FRIDAY AS THE
CONSENSUS LREF SUGGEST ANOTHER SOUTHERN STREAM WAVE MOVING INTO
THE AREA FROM THE WEST.
TEMPERATURES WILL BE SEASONABLE FOR THIS TIME OF YEAR. DUE TO THE
GENERAL ZONAL FLOW ACROSS THE AREA, AM NOT EXPECTING SIGNIFICANT DAY
TO DAY CHANGES IN THE TEMPS NEXT WEEK. HIGHS MOSTLY IN THE MID 70S
TO LOWER 80S. LOWS IN THE MID 50S TO LOWER 60S.
AVIATION /19Z FRIDAY THROUGH WEDNESDAY/
AS OF 230 PM EDT FRIDAY...
LOW PRESSURE OVER CENTRAL VIRGINIA WILL MOVE EAST AND OFFSHORE
TONIGHT. THIS WILL ALLOW THE LOWER CLOUDS OVER NORTHERN VA AND THE
MD EASTERN SHORE TO MOVE SOUTHWARD OVERNIGHT. WILL BRING ALL SITES
TO MVFR LATE THIS AFTERNOON INTO THIS EVENING AS THE BOUNDARY MOVES
SOUTHWARD. SHOWERS MAY IMPACT RIC, PHF AND ORF LATE THIS AFTERNOON
INTO THIS EVENING, WHILE THUNDERSTORMS ARE POSSIBLE AT OR NEAR ECG
AFTER 21Z. VFR CONDITIONS EXPECTED ON SATURDAY. NORTH TO NORTHEAST
WINDS EXPECTED THROUGH THE PERIOD (EXCEPT INITIALLY WESTERLY AT ECG
LATE THIS AFTERNOON).
OUTLOOK: MAINLY DRY/VFR MOST OF SATURDAY, BUT ANOTHER CHANCE
FOR SHOWERS SATURDAY NIGHT INTO SUNDAY. DRY CONDITIONS RETURN
MONDAY.
AVIATION /00Z SATURDAY THROUGH WEDNESDAY/
AS OF 230 PM EDT FRIDAY...
LOW PRESSURE OVER CENTRAL VIRGINIA WILL MOVE EAST AND OFFSHORE
TONIGHT. THIS WILL ALLOW THE LOWER CLOUDS OVER NORTHERN VA AND THE
MD EASTERN SHORE TO MOVE SOUTHWARD OVERNIGHT. WILL BRING ALL SITES
TO MVFR LATE THIS AFTERNOON INTO THIS EVENING AS THE BOUNDARY MOVES
SOUTHWARD. SHOWERS MAY IMPACT RIC, PHF AND ORF LATE THIS AFTERNOON
INTO THIS EVENING, WHILE THUNDERSTORMS ARE POSSIBLE AT OR NEAR ECG
AFTER 21Z. VFR CONDITIONS EXPECTED ON SATURDAY. NORTH TO NORTHEAST
WINDS EXPECTED THROUGH THE PERIOD (EXCEPT INITIALLY WESTERLY AT ECG
LATE THIS AFTERNOON).
OUTLOOK: MAINLY DRY/VFR MOST OF SATURDAY, BUT ANOTHER CHANCE
FOR SHOWERS SATURDAY NIGHT INTO SUNDAY. DRY CONDITIONS RETURN
MONDAY.
MARINE
AS OF 320 PM EDT FRIDAY...
KEY MESSAGES:
-SMALL CRAFT ADVISORIES ARE IN EFFECT FOR ALL OF BAY AND LOWER
JAMES RIVER AND ATLANTIC OCEAN THROUGH SATURDAY MORNING-
AFTERNOON.
-PREVAILING SUB-ADVISORY CONDITIONS RETURN BY SATURDAY
AFTERNOON/EVENING, AND ARE EXPECTED TO PERSIST THROUGH AT LEAST
MONDAY.
THE FRONT HAS PUSHED SOUTH INTO NC AND BEHIND IT, WINDS HAVE
TURNED TO THE NE AND ARE GENERALLY 15-20 KT WITH SOME GUSTS TO
25 KT ACROSS ALL WATER NORTHERN WATERS. WINDS HAVE BEEN
PREFORMING WELL AND IN LINE WITH THE ARW AND HRRR WITH DECENT
CAA AND WATER TEMPS IN THE 60S TO NEAR 70F IN MANY AREAS MIXING
THE WIND. EXPECT N-NNE WINDS TO REMAIN AROUND 20KT (WITH
FREQUENT 25KT GUSTS) THROUGH MUCH OF THE NIGHT. A FEW 30KT GUSTS
ARE POSSIBLE. THE SCAS RUN THROUGH SAT AM- SAT AFTN (ENDING
ACROSS THE NRN WATERS EARLIEST/SRN WATERS LATEST). SEAS BUILD TO
~6FT ACROSS ALL OCEAN ZONES TONIGHT, WITH 3-4FT WAVES ON THE
BAY. WINDS QUICKLY DIMINISH TO ~10KT BY EARLY SAT AFTN AS THE
PRESSURE GRADIENT RELAXES AS THE LOW MOVES WELL OFFSHORE. SEAS
SHOULD QUICKLY FALL BELOW 5FT BY MID TO LATE AFTN.
A SECONDARY FRONT TRACKS ACROSS THE COAST LATER SATURDAY
AFTN/EVENING. THE WIND BECOMES SE 10-15KT AHEAD OF THE FRONT AND
THEN SHIFTS TO NW LATE SATURDAY NIGHT/EARLY SUNDAY. THE CURRENT
FORECAST IS SUB-SCA, ALTHOUGH SOME GUIDANCE SUGGESTS LOW-END SCA
CONDITIONS ARE POSSIBLE OVER THE CHES BAY. HIGH PRESSURE BUILDS OVER
THE COAST LATER SUNDAY INTO MONDAY. ANOTHER LOW PRESSURE SYSTEM AND
WEAK COLD FRONT IMPACT THE MID-ATLANTIC COAST IN THE TUESDAY-
WEDNESDAY TIMEFRAME.
TIDES/COASTAL FLOODING
AS OF 320 PM EDT FRIDAY...
-KEY MESSAGES:
-A COASTAL FLOOD STATEMENT HAS BEEN ADDED FOR THE BAY SIDE OF
THE MD EASTERN SHORE FOR THE HIGH TIDE LATE TONIGHT/EARLY
TOMORROW MORNING.
-COASTAL FLOOD ADVISORIES HAVE BEEN ISSUED FOR ALMOST ALL OF
THE AREA BORDERING THE CHESAPEAKE BAY, ATLANTIC OCEAN, AND
TIDAL RIVERS FOR TONIGHT'S HIGH TIDE.
-MINOR TIDAL FLOODING (INUNDATION OF ~1 FOOT ABOVE GROUND LEVEL
IN VULNERABLE AREAS) IS EXPECTED DURING HIGH TIDE TONIGHT INTO
EARLY SATURDAY.
AN INCREASING NE THEN N WIND TONIGHT INTO EARLY SATURDAY ALONG WITH
ELEVATED ASTRONOMICAL TIDES WILL BRING A ROUND OF WIDESPREAD MINOR
TIDAL FLOODING ACROSS THE AREA. WATER LEVELS ARE EXPECTED TO CREST A
FEW TENTHS OF A FOOT ABOVE MINOR FLOOD THRESHOLDS IN AREAS ADJACENT
TO THE CHES BAY, ATLANTIC OCEAN, AND TIDAL RIVERS DURING TONIGHT'S
HIGH TIDE CYCLE. LEVELS AT OYSTER MAY CREST RIGHT AT THE MODERATE
FLOOD THRESHOLD FOR THAT SITE. COASTAL FLOOD ADVISORIES STILL IN
EFFECT FOR ALL AREAS EXCEPT THE BAY SIDE OF THE MD EASTERN
SHORE. A COASTAL FLOOD STATEMENT HAS BEEN ADDED FOR THE BAY SIDE
OF THE MD EASTERN SHORE FOR THE HIGH TIDE LATE TONIGHT DUE TO
EXPECTED NEAR-MINOR FLOODING.
AKQ WATCHES/WARNINGS/ADVISORIES
MD...COASTAL FLOOD ADVISORY UNTIL 2 AM EDT SATURDAY FOR MDZ024-025.
NC...COASTAL FLOOD ADVISORY UNTIL 1 AM EDT SATURDAY FOR NCZ102.
VA...COASTAL FLOOD ADVISORY UNTIL 2 AM EDT SATURDAY FOR VAZ099-100.
COASTAL FLOOD ADVISORY FROM 1 AM TO 7 AM EDT SATURDAY FOR
VAZ075-077.
COASTAL FLOOD ADVISORY FROM 11 PM THIS EVENING TO 6 AM EDT
SATURDAY FOR VAZ076-078-085-521-522.
COASTAL FLOOD ADVISORY UNTIL 3 AM EDT SATURDAY FOR VAZ084-086-
095-097-098-523.
COASTAL FLOOD ADVISORY FROM 10 PM THIS EVENING TO 5 AM EDT
SATURDAY FOR VAZ089-090-093-096-524-525.
MARINE...SMALL CRAFT ADVISORY UNTIL 7 AM EDT SATURDAY FOR ANZ630-631-
638.
SMALL CRAFT ADVISORY UNTIL 10 AM EDT SATURDAY FOR ANZ632-634-
650-652-654.
SMALL CRAFT ADVISORY FROM 10 PM THIS EVENING TO 10 AM EDT
SATURDAY FOR ANZ633.
SMALL CRAFT ADVISORY FROM 10 PM THIS EVENING TO 4 PM EDT
SATURDAY FOR ANZ656-658.
SYNOPSIS...RHR/MRD
NEAR TERM...MRD
SHORT TERM...MRD
LONG TERM...MRD
AVIATION...MRD
MARINE...AM/JAO
TIDES/COASTAL FLOODING...
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