497
FXUS64 KLCH 252319
AFDLCH
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
619 PM CDT THU APR 25 2024
..NEW AVIATION
SHORT TERM
(TONIGHT THROUGH SATURDAY NIGHT)
ISSUED AT 344 PM CDT THU APR 25 2024
MAIN STORY CONCERNING THE SHORT RANGE FORECAST WILL BE THE ONSET OF
STRONG WINDS ACROSS THE MARINE ZONES AND INLAND INTERESTS WHICH WILL
TREND THROUGH THE WEEKEND. AT PRESENT TIME, THERE IS A SMALL CRAFT
ADVISORY FOR PORTIONS OF THE COASTAL LAKE, BAYS, AND GULF OF MEXICO
TAKING EFFECT TONIGHT THROUGH 10PM CDT FRIDAY NIGHT. DO NOTE, INLAND
WINDS AND GUSTS APPROACH, BUT REMAIN JUST SHY OF SUSTAINED CRITERIA
FOR WIND ADVISORY DURING PERIODS OF THIS TIME. CONFIDENCE IS STRONG
ENOUGH TO STAND DOWN ON A HIGH WIND WATCH. HOWEVER, BRIEF PERIODS OF
SUSTAINED WINDS NEAR 35MPH OR OCCASIONAL GUSTS APPROACHING 45 MPH
ARE NOT OUT OF THE QUESTION. WITH THE NATIONAL BLEND OF MODEL
STAYING FAIRLY CONGRUENT WITH MANY DETERMINISTIC ENSEMBLES REGARDING
THE PRESSURE GRADIENT AND GENERAL TIMING, A WIND ADVISORY IS MOST
CERTAINLY POSSIBLE INLAND-LIKELY LATER IN THE SHORT RANGE TRENDING
INTO THE LONG RANGE- TO COMPLEMENT THE SMALL CRAFT ADVISORY ALREADY
SET FOR THE MARINE ZONES. TOUCHING FURTHER ON THE MARINE ZONES
PARTICULARLY SOUTH OF THE SABINE AND CALCASIEU CHANNELS, DO EXPECT
NEAR GALES TO GALE GUSTS TO OCCUR PERIODICALLY THROUGH SATURDAY INTO
SUNDAY. FURTHER NOTE, THESE ELEVATED WINDS AND GUSTS WILL CONTAIN
SE COMPONENTS WHICH WILL MAKE DIRECT NORTH / SOUTH NAVIGATION
DIFFICULT ON LARGE PROFILE VESSELS. FOR HIGH PROFILE VEHICLES, THESE
CONDITIONS WILL ALSO MAKE IT DIFFICULT TO MAINTAIN CONTROL DURING
THE PERIOD OF STRONGER WINDS/GUSTS.
CURRENTLY, A 996MB LOW PRESSURE IS DEEPENING EAST OF THE COLORADO
ROCKIES WITH MODERATE TROUGHING EXTENDING SOUTH INTO NORTHERN
MEXICO. UPSTREAM OF THE LOW, A LARGE AREA OF SUBSIDENCE OCCUPIES
EAST OF THE MISSISSIPPI WHERE HIGH PRESSURE IS MODIFYING INTO THE
WESTERN ATLANTIC WATERS BY FRIDAY AFTERNOON. WHILE THE HIGH PRESSURE
CELL MAXIMIZES NEAR CAPE COD, RIDGING WILL EXTEND SSW ACROSS THE SE
CONUS INTO THE CENTRAL GULF OF MEXICO BEFORE SLACKENING TO LOW
PRESSURE OVER THE TX/MEX COAST. A PROGRESSIVE UPPER AIR PATTERN OVER
THE CENTRAL PLAINS WILL LIFT NORTH OF THE SUBTROPICAL RIDGE OVER SE
CONUS. THUS, THE SHORTWAVE AND ABOVEMENTIONED LOW PRESSURE WILL
SLOWLY MOVE INTO THE UPPER MIDWEST THROUGH EARLY SATURDAY MORNING
WHILE THE COLD FRONT EXTENDING SOUTH TRANSITIONS TO A DRY LINE
TROUGH. DUE TO STRONG MOISTURE ADVECTION AHEAD OF THE TROUGH, VERY
MINIMAL POPS DEVELOP OVER PORTIONS OF SETX AND FAR SWLA, BUT SHOULD
DIMINISH BY THE DAYLIGHT HOURS SATURDAY. HOWEVER, IN PLACE WILL BE
THE STEEP GRADIENT INFLUENCING GUSTY CONDITIONS AT THE SURFACE.
DESPITE DOMINATE CLOUDY CONDITIONS, DIURNAL TEMPERATURES WILL TOP
OUT IN THE LOW TO MID 80’S THROUGH SATURDAY AFTERNOON. WINDS WILL
CONTINUE TO INCREASE THROUGH THE EARLY EVENING HOURS, BEFORE SLIGHT
EASING OCCURS AFTER DAYBREAK SUNDAY WHEN A SECONDARY IMPULSE FROM
THE PACIFIC ACCELERATES ACROSS THE WESTERN CONUS AND HELPS BROADEN /
FILL THE LOW PRESSURE GRADIENT ACROSS THE CENTRAL / SOUTHERN PLAINS.
KOWALSKI/30
LONG TERM
(SUNDAY THROUGH NEXT WEDNESDAY)
ISSUED AT 344 PM CDT THU APR 25 2024
FOR SUNDAY, A MID TO UPPER LEVEL SHORTWAVE AND ACCOMPANYING SURFACE
LOW OVER THE TX/OK PANHANDLE EXPECTED TO MOVE NORTH NORTHEAST
THROUGH MONDAY. THE SURFACE LOW WITH STRONGER HIGH PRESSURE ACROSS
THE EAST COAST WILL KEEP A TIGHT PRESSURE GRADIENT OVER OUR REGION
SUNDAY WITH ONGOING SOUTHERLY WINDS AROUND 20-25 MPH WITH GUSTS 30-
35 MPH LIKELY. THE MAIN AREA OF LIFT EXPECTED TO REMAIN TO OUR NORTH
AND NORTHWEST, ALONG WITH THE GREATEST THREAT OF SEVERE WEATHER FOR
SUNDAY. HOWEVER, THE DIFFLUENT FLOW ALOFT WILL ALLOW FOR INCREASED
CHANCES OF SHOWERS AND THUNDERSTORMS NORTH OF I-10 BY SUNDAY
AFTERNOON AND SUNDAY NIGHT, WITH THE HIGHEST CHANCES EXPECTED MONDAY
AROUND 50-70%. WPC HAS AREAS OUTLINED IN A SLIGHT RISK OF EXCESSIVE
RAINFALL NORTH OF I-10 OVER SE TX/C LA FOR MONDAY, WITH A MARGINAL
RISK ELSEWHERE. CHANCES DIMINISH DOWN TO 30-50% FOR TUESDAY
AFTERNOON, AND 20% OR LESS FOR WEDNESDAY AND THURSDAY.
TEMPERATURES WILL REMAIN ABOVE NORMAL WITH OVERNIGHT LOWS IN THE
UPPER 60S TO LOWER 70S, AND AFTERNOON HIGHS IN THE MID TO UPPER 80S.
08/DML
AVIATION
(00Z TAFS)
ISSUED AT 616 PM CDT THU APR 25 2024
VFR CEILINGS WILL GRADUALLY BECOME MVFR OVERNIGHT, EXCEPT ACROSS
ACADIANA WHERE MVFR CEILINGS AREN'T EXPECTED TO ARRIVE UNTIL AFTER
SUNRISE TOMORROW. TOMORROW. MVFR TO VFR CEILINGS WILL PREVAIL
AREA-WIDE. OTHERWISE, MAIN CONCERN THROUGH THE FORECAST PERIOD
WILL BE GUSTY WINDS, WITH OCCASIONAL GUSTS POSSIBLE OVERNIGHT
FOLLOWED BY FREQUENT GUSTS TOMORROW THROUGHOUT THE DAY.
17
MARINE
ISSUED AT 211 AM CDT THU APR 25 2024
STARTING ON TODAY WINDS WILL START TO INCREASE BECOMING MODERATE
TO STRONG. WINDS WILL CONTINUE TO INCREASE ON FRIDAY WITH GUSTS UP
TO 30 KNOTS. THE ELEVATED WINDS WILL CONTINUE ON SATURDAY AS WELL
BEFORE WEAKENING ON SUNDAY. WAVES WILL ALSO BUILD IN THE OUTER
WATERS REACHING 7 FEET OR MORE BY FRIDAY MORNING. LAKES AND BAYS
WILL BE ROUGH TO VERY ROUGH CONDITIONS.
A SMALL CRAFT ADVISORY IS LIKELY STARTING ON THURSDAY NIGHT AND
LASTING THROUGH SATURDAY AS THE PRESSURE GRADIENT FURTHER
TIGHTENS ACROSS THE AREA BUILDING SEAS FURTHER INTO THE WEEKEND
UNDER A STRONG SOUTHERLY REGIME.
PRELIMINARY POINT TEMPS/POPS
AEX 65 84 68 86 / 0 0 10 10
LCH 69 82 71 84 / 0 0 10 0
LFT 69 84 71 86 / 0 0 10 0
BPT 70 83 71 84 / 0 0 20 0
LCH WATCHES/WARNINGS/ADVISORIES
LA...NONE.
TX...NONE.
GM...SMALL CRAFT ADVISORY FROM 10 PM THIS EVENING TO 10 PM CDT FRIDAY
FOR GMZ430-432-450-452-470-472.
SHORT TERM...30
LONG TERM....08
AVIATION...17
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