221
FXUS61 KAKQ 301900
AFDAKQ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE WAKEFIELD VA
300 PM EDT WED APR 30 2025
SYNOPSIS
VERY WARM WEATHER IS EXPECTED FROM TODAY THROUGH FRIDAY.
SCATTERED THUNDERSTORMS ARE EXPECTED ACROSS THE SOUTHERN HALF OF
THE AREA THIS AFTERNOON AND EVENING, WITH LOWER PRECIPITATION
CHANCES ON THURSDAY AND FRIDAY. COOLER TEMPERATURES ARE EXPECTED
LATE IN THE WEEKEND INTO EARLY NEXT WEEK, ALONG WITH A HIGHER
LEVEL OF UNCERTAINTY DUE TO THE POTENTIAL FOR A SLOW MOVING, OR
CUTOFF LOW PRESSURE SYSTEM.
NEAR TERM /UNTIL 6 AM THURSDAY MORNING/
AS OF 1150 AM EDT WEDNESDAY...
KEY MESSAGES:
- VERY WARM THIS AFTERNOON WITH HIGHS MAINLY IN THE MID TO UPPER
80S.
- SCATTERED SHOWERS AND THUNDERSTORMS DEVELOP LATER THIS
AFTERNOON, WITH THE BEST CHANCES ALONG AND SOUTH OF I-64. A
FEW OF THE STORMS COULD PRODUCE LOCALLY DAMAGING WIND GUSTS,
ESPECIALLY ACROSS SOUTH/SOUTHEAST VA.
THE LATEST WX ANALYSIS SHOWS RIDGING ALOFT CENTERED ACROSS THE
EASTERN GULF COAST REGION, AND INTO FLORIDA, ALONG THE SE CONUS
COAST, WITH SFC HIGH PRESSURE OUT NEAR BERMUDA. THE COLD FRONT
IS CURRENTLY SINKING SOUTH FROM NORTHERN VA, AND IS EXPECTED TO
SHIFT THE WINDS TO THE NNE ACROSS THE EASTERN SHORE OVER THE
NEXT FEW HRS, WHILE LIGHT WESTERLY WINDS PERSIST ACROSS AREAS
ALONG AND S OF I-64 THROUGH MOST OF THE AFTN. TEMPERATURES ARE
MOSTLY NOW ABOVE 80F, EVEN ACROSS THE EASTERN SHORE, WITH DEW
PTS MAINLY FROM 60-65F. HIGHS WILL BE INTO THE UPPER 80S ALONG
AND S OF THE FRONT, WITH LOWER 80S TO THE NE (PERHAPS DROPPING A
FEW DEGREES DURING THE LATER AFTN HRS). LATEST SPC MESOANALYSIS
INDICATES ~1000 J/KG OF SFC- BASED CAPE NOW INTO NW PORTIONS OF
THE FA, WITH FORECAST SFC- BASED CAPE TO INCREASE TO 2000-2500
J/KG BY LATE AFTN ALONG THE I-64 CORRIDOR. CORRESPONDING ML CAPE
VALUES ARE NEAR 500 J/KG NOW ACROSS THE NW, FORECAST TO
INCREASE TO ~1500 J/KG BY MID TO LATE AFTN. LOW LEVEL LAPSE
RATES (0-3KM) ARE ALREADY BECOMING STEEP, AND SHOULD INCREASE TO
8.5-9C/KM BY ~20Z, WHICH SHOULD BE SUFFICIENT FOR SCATTERED
STORM DEVELOPMENT. WHILE THE PLACEMENT OF LATER
AFTERNOON/EVENING TSTMS I STILL A BIT UNCERTAIN, THE LATEST CAMS
STILL SUPPORT THE INITIAL FORMATION NEAR ROUGHLY ALONG OR A
LITTLE TO THE SOUTH OF THE I-64 CORRIDOR AROUND 2-4 PM BEFORE
INCREASING IN COVERAGE DURING THE LATE AFTN/EARLY EVENING AS
THEY PROGRESS SOUTHWARD BEFORE GRADUALLY WEAKENING AFTER 9-10 PM
AS THEY PUSH INTO NE NC. THE MOST LIKELY TIMING FOR STORMS IS
3-6 PM ACROSS CENTRAL VA (INCLUDING RIC), 5-10 PM IN SE VA, AND
7-11 PM IN NE NC. WITH TEMPS IN THE MID- UPPER 80S AND LOWER-MID
60S DEW PTS SOUTH OF THE FRONT. WHILE DEEP LAYER SHEAR AND MID-
LEVEL LAPSE RATES WILL BE WEAK, A FEW OF THE STORMS COULD
PRODUCE 45 TO 60 MPH WIND GUSTS GIVEN THE STRONG SFC HEATING AND
RESULTANT DOWNBURST/COLD POOL POTENTIAL. GUSTS IN THIS RANGE
COULD RESULT IN LOCALIZED TREE/POWER LINE DAMAGE. MAINLY DRY WX
IS EXPECTED AFTER MIDNIGHT TONIGHT WITH LOWS IN THE LOWER 60S IN
MOST AREAS (MID 50S ON THE EASTERN SHORE WITH WEAK ONSHORE
FLOW).
SHORT TERM /6 AM THURSDAY MORNING THROUGH FRIDAY NIGHT/
AS OF 300 AM EDT WEDNESDAY...
KEY MESSAGE:
- A FEW SHOWERS AND STORMS ARE POSSIBLE ACROSS MAINLY N/NW
PORTIONS OF THE AREA THURSDAY AND FRIDAY AFTERNOON/EVENING
WITH CONTINUED WARM WEATHER, AS THE APPROACHING COLD FRONT
WILL LIKELY REMAIN WELL TO OUR NW THROUGH THE END OF THE
WORKWEEK.
THE RIDGE ALOFT TO EXPAND BACK TO THE N A BIT ON THU BEFORE BECOMING
MORE SUPPRESSED ON FRIDAY. MEANWHILE, THE BACKDOOR FRONT QUICKLY
RETREATS NORTHWARD ON THU AS LOW PRESSURE BEGINS TO DEEPEN AS IT
TRACKS FROM THE PLAINS TO SOUTHERN GREAT LAKES. WITH THE RETREATING
FRONT AND STRONG LOW STILL WELL TO OUR NW, AND RISING UPPER HEIGHTS,
THE BEST FORCING FOR ASCENT WILL BE OFF TO THE NORTH/NORTHWEST.
HOWEVER, ISOLATED SHOWERS AND STORMS WILL BE POSSIBLE THU AFTN INTO
THE EVENING, MAINLY ACROSS N/NW PORTIONS OF THE FA. SEVERE WX IS NOT
EXPECTED ON THU, AND DOUBT THAT WE'LL SEE MUCH IN THE WAY OF
CONVECTION WITH THE RISING UPPER HEIGHTS AND NOT MUCH FORCING FOR
ASCENT. VERY WARM INLAND W/ HIGHS WELL INTO THE 80S ON THU. THE
TEMPERATURE FORECAST IS TRICKY NEAR THE COAST WITH THE FLOW
REMAINING ONSHORE FOR MOST OF THE DAY. THERE MAY VERY WELL BE A
DECENT TEMPERATURE GRADIENT BETWEEN PLACES LIKE OCEAN CITY (WHERE
TEMPS STRUGGLE TO GET OUT OF THE 60S) AND THE WESTERN PART OF THE MD
EASTERN SHORE (WITH TEMPS NEAR 80F).
THE ABOVE MENTIONED LOW PRESSURE SYSTEM WILL CONTINUE TO DEEPEN AS
IT TRACKS NE THROUGH THE END OF THE WEEK, REACHING QUEBEC BY FRIDAY
NIGHT. THIS FEATURE EVENTUALLY DRAGS A SEASONALLY STRONG COLD FRONT
TOWARD THE AREA LATE FRIDAY. THE ASSOCIATED SHORTWAVE TROUGH ALOFT
REMAINS WELL TO OUR W THROUGH FRI NIGHT, ONLY REACHING IL/IN. THE
00Z/30 MODELS HAVE CONTINUED TO BE SLOWER WITH THE FRONT, WITH MOST
OF THE CONVECTION EXPECTED TO BE NEAR/JUST WEST OF THE MOUNTAINS ON
FRI/FRI NIGHT WITH ISOLATED TO PERHAPS SCATTERED TSTMS ACROSS OUR
AREA. REMAINING VERY WARM FRIDAY, WITH HIGHS WELL INTO THE 80S
(PERHAPS UPPER 80S FOR THE SE 1/2 OF THE CWA).
LONG TERM /SATURDAY THROUGH WEDNESDAY/
AS OF 300 AM EDT WEDNESDAY...
KEY MESSAGES:
- SHOWER/STORMS ARE LIKELY ON SATURDAY AS A COLD FRONT CROSSES THE
AREA.
- THE FORECAST FOR LATE NEXT WEEKEND INTO EARLY NEXT WEEK
REMAINS HIGHLY UNCERTAIN GIVEN VARYING MODEL SOLUTIONS WITH
RESPECT TO A SLOW MOVING UPPER TROUGH THAT COULD POTENTIALLY
BECOME CUT OFF.
THE SHORTWAVE TROUGH ALOFT APPROACHES THE LOCAL AREA THIS
WEEKEND, THERE ARE STILL SIGNIFICANT MODEL AND ENSEMBLE
DIFFERENCES WITH RESPECT TO THE EVOLUTION OF THAT SHORTWAVE,
ALTHOUGH THE 00Z/30 MODELS AND ENSEMBLES CONTINUE TO TREND
TOWARD A CUTOFF LOW FORMING TO OUR WEST BY LATE IN THE WEEKEND.
THE GFS/GEFS REMAIN VERY PROGRESSIVE AND FORECAST THE SHORTWAVE
TO MOVE OFFSHORE BY LATE IN THE WEEKEND. HOWEVER, AM BEGINNING
TO LEAN TOWARD THE CUTOFF LOW SOLUTION GIVEN ENSEMBLE TRENDS
FROM THE CMCE AND EPS.
HAVE HIGHER CONFIDENCE IN THE FORECAST FOR SAT AND STILL HAVE LOW
CONFIDENCE FROM SUN-TUE (BUT SLIGHTLY FAVOR THE CUTOFF LOW SOLUTION)
AS THE GEFS ENSEMBLE IS STILL VERY DIFFERENT FROM THE EPS/CMCE (AND
IT ISN'T JUST ONE DETERMINISTIC RUN OF THE GFS THAT IS AN OUTLIER).
SHOWERS/TSTMS EVENTUALLY BECOME LIKELY ACROSS ALL AREAS SATURDAY
AFTN-SATURDAY NIGHT. THE HIGHEST CHANCES INITIALLY ARE IN THE
PIEDMONT DURING THE AFTN/EVENING BUT MOVE TOWARD THE COAST BY SAT
NIGHT/EARLY SUNDAY AM. HIGHS STILL IN THE LOWER-MID 80S NEAR THE
COAST ON SAT, WITH UPPER 70S FARTHER INLAND. A FEW STRONG TO SEVERE
STORMS ARE POSSIBLE ON SATURDAY AS WELL (AND SHEAR WILL LIKELY BE
HIGHER WITH THE APPROACHING UPPER SHORTWAVE). THE MAIN THREAT WILL
LIKELY BE LOCALLY DAMAGING WINDS.
THE FORECAST FOR LATE THIS WEEKEND INTO EARLY NEXT WEEK DEPENDS ON
THE EVOLUTION OF THAT SHORTWAVE. IN GENERAL, COOLER TEMPERATURES ARE
LIKELY REGARDLESS OF WHAT SOLUTION VERIFIES, BUT THE CHC FOR RAIN
REMAINS HIGHLY UNCERTAIN. IF IT REMAINS PROGRESSIVE LIKE THE
GFS/GEFS SHOWS, DRY AND LESS HUMID WX PREVAILS SUNDAY- TUESDAY. IF A
CLOSED LOW DOES FORM PER THE ECMWF/CMC, CLOUDS AND PRECIP CHANCES
WILL CONTINUE THROUGH EARLY NEXT WEEK. NBM GUIDANCE NOW HAS CHANCE
POPS ACROSS MUCH OF THE AREA FROM SUNDAY-TUESDAY OWING TO THE TREND
TOWARD A CUTOFF LOW. HARD TO PINPOINT SPECIFICS ATTM BUT WE COULD
SEE A WIDESPREAD 0.50"+ OF RAIN FROM SUN-TUE NIGHT IF THE CUTOFF LOW
SOLUTION VERIFIES.
AVIATION /19Z WEDNESDAY THROUGH MONDAY/
AS OF 645 AM EDT WEDNESDAY...
MOSTLY VFR CONDITIONS WILL PREVAIL AT ALL TERMINALS THROUGH THE
12Z/30 TAF PERIOD. EXPECT CLEAR SKIES OUTSIDE OF SCT-BKN HIGH
CLOUDS FROM DISSIPATING CONVECTION THROUGH MUCH OF THE MORNING.
THEN, A COLD FRONT APPROACHES FROM THE NORTH THIS AFTERNOON,
WITH SCT-BKN CUMULUS AND THE POTENTIAL FOR SHOWERS AND
THUNDERSTORMS ALONG AND AHEAD OF THE FRONT. THE MOST LIKELY
TIMING FOR CONVECTION IS BETWEEN 19-00Z AT RIC, 21-01Z AT
PHF/ORF, AND 23-03Z AT ECG. TSTMS ARE NOT EXPECTED AT SBY. HAVE
MAINTAINED PROB30 GROUPS AT RIC/PHF/ORF/ECG THIS
AFTERNOON/EVENING, AS BRIEF IFR/LIFR VSBYS AND GUSTY WINDS ARE
POSSIBLE IN ANY TSTM. CONVECTION SHOULD DISSIPATE BY 04-05Z THU.
MVFR CIGS ARE POSSIBLE LATE AT RIC/PHF/ORF JUST BEHIND THE COLD
FRONT.
OUTLOOK: LINGERING MVFR CIGS ARE POSSIBLE ACROSS CENTRAL/SE VA
THU AM, WITH VFR RETURNING THE REST OF THE DAY. ISOLATED TSTMS
LIKELY REMAIN NW OF THE TERMINALS ON THU. A STRONGER FRONT
APPROACHES THE REGION LATE FRIDAY, AND IS EXPECTED TO MOVE INTO
THE AREA ON SATURDAY. THE BEST CHANCE NOW APPEARS TO BE SATURDAY
FOR WIDESPREAD SHOWERS AND STORMS, BUT THERE WILL BE ISOLATED-
SCATTERED COVERAGE FRIDAY AFTERNOON/EVENING.
MARINE
AS OF 300 PM EDT WEDNESDAY...
KEY MESSAGES:
- A WEAK FRONT LINGERS OVER THE AREA TONIGHT INTO THURSDAY WITH SUB-
SCA ONSHORE FLOW.
- SMALL CRAFT CONDITIONS ARE POSSIBLE AHEAD OF THE NEXT FRONT FRIDAY
INTO SATURDAY.
- A PERIOD OF ENHANCED ONSHORE FLOW AND SCA CONDITIONS APPEARS
INCREASINGLY LIKELY FOR EARLY NEXT WEEK.
A WEAK FRONT IS DROPPING SOUTH AND EAST THIS AFTERNOON WITH
HIGH PRESSURE REMAINING OFF THE SE CONUS. WINDS ARE GENERALLY
5-10 KT AND VARIABLE ACROSS THE REGION. WAVES ARE AROUND 1 FOOT
WITH SEAS 2-3 FT.
BENIGN MARINE CONDITIONS ARE EXPECTED TONIGHT, OUTSIDE OF ISOLATED
SHOWERS AND STORMS THAT MANAGE TO FORM INLAND AND MOVE OFFSHORE.
BRIEF GUSTY WINDS ARE THE MAIN THREAT POSED BY CONVECTION THIS
EVENING. THE FRONT IS FORECAST TO STALL ACROSS THE SOUTHERN HALF
OF THE AREA AND LINGER THROUGH MUCH OF THURSDAY BEFORE LIFTING
BACK NORTH LATE IN THE DAY. SE WINDS STRENGTHEN TO 10-15 KT LATE
THURSDAY AFTERNOON AND BECOME SW 15-20 KT THURSDAY NIGHT INTO
SATURDAY. SCA CONDITIONS ARE POSSIBLE DURING THIS PERIOD BUT
RECENT GUIDANCE HAS TRENDED TOWARD SOMEWHAT WEAKER WINDS AND
LOCAL WIND PROBS NOW ONLY SHOW A 30-50% CHANCE OF 18+ KT WINDS
IN THE CHES BAY. A FRONT MOVES THROUGH THE REGION EARLY SUNDAY
WITH INCREASING NW WINDS BEHIND THE BOUNDARY. 12Z GUIDANCE HAS
SHIFTED TOWARD A POTENTIALLY SIGNIFICANT PERIOD OF ONSHORE FLOW
EARLY NEXT WEEK WHICH WOULD ALLOW FOR INCREASING WINDS WITH
SEAS TO BUILDING TO 5-8 FT (HIGHEST WELL OFFSHORE) FROM EARLY
MONDAY THROUGH TUESDAY NIGHT.
AKQ WATCHES/WARNINGS/ADVISORIES
MD...NONE.
NC...NONE.
VA...NONE.
MARINE...NONE.
SYNOPSIS...ERI
NEAR TERM...ERI/LKB
SHORT TERM...ERI/LKB
LONG TERM...ERI/LKB
AVIATION...ERI
MARINE...RHR
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