341
FXUS65 KVEF 182007
AFDVEF
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
1207 PM PST MON NOV 18 2024
SYNOPSIS
AN AREA OF LOW PRESSURE WILL PASS NORTH OF THE REGION
THIS AFTERNOON AND EVENING AND WILL INCREASE WESTERLY WINDS IN THE
BARSTOW AREA ALONG WITH PROVIDING COOLER THAN NORMAL TEMPERATURES
AREAWIDE. AN AREA OF HIGH PRESSURE WILL MOVE INTO THE REGION ON
TUESDAY AND THEN BUILD OVER THE FOUR CORNERS REGION ON WEDNESDAY AND
THURSDAY. TEMPERATURES WILL BEGIN TO RECOVER ON WEDNESDAY AND BE
CLOSE TO THE SEASONAL NORMAL ON THURSDAY AND FRIDAY.
SHORT TERM
THROUGH TUESDAY NIGHT.
A TROUGH OF LOW PRESSURE WILL MOVE ACROSS THE GREAT BASIN TODAY AND
INTO UTAH THIS EVENING AND OVERNIGHT. THE MAIN WEATHER IMPACTS WILL
BE AN INCREASE IN SOUTHWEST TO WESTERLY WINDS, ESPECIALLY ACROSS SAN
BERNARDINO COUNTY WHERE WIND GUSTS OF 30 TO 40 MPH WILL BE COMMON
ALONG WITH SOME SHORT-LIVED GUSTS ABOVE 40 MPH. BEHIND THIS TROUGH
WINDS WILL SHIFT TO THE NORTH AND COOLER, BELOW NORMAL TEMPERATURES
WILL BE FOUND REGIONWIDE ON TUESDAY. THE NORMAL HIGH TEMPERATURE IN
LAS VEGAS IS 66 DEGREES THIS TIME OF YEAR AND HIGHS ON TUESDAY WILL
BE ONLY IN THE MID 50S. THE FREEZE WARNING FOR NORTHEAST CLARK
COUNTY REMAINS IN PLACE FOR TONIGHT AS THE FIRST FREEZE OF THE YEAR
IS EXPECTED. TUESDAY NIGHT WILL BE A CHILLY ONE WITH TEMPERATURES
FALLING INTO THE 30S FOR MANY LOCATIONS IN THE LAS VEGAS VALLEY.
LONG TERM
WEDNESDAY THROUGH SUNDAY.
AN AREA OF HIGH PRESSURE WILL BUILD IN JUST TO OUR EAST, OVER THE
FOUR CORNERS REGION ON WEDNESDAY AND THURSDAY. THIS WILL ALLOW
TEMPERATURES TO RECOVER WITH HIGHS NEARING THE SEASONAL NORMAL ON
WEDNESDAY AND AT OR SLIGHTLY ABOVE NORMAL ON THURSDAY. THE NEXT
WEATHER MAKER WILL BE A TROUGH OF LOW PRESSURE THAT WILL BE OFF THE
NORTHERN CALIFORNIA COAST ON FRIDAY. THIS SYSTEM WILL IMPACT THE
REGION OVER THE WEEKEND AND INTO NEXT WEEK PROVIDING UNSETTLED
WEATHER WITH AN INCREASE IN WINDS AREAWIDE, AND RAIN AND SNOW FROM
THE SIERRA INTO CENTRAL NEVADA. PRECIPITATION ACROSS MUCH OF THE
DESERT LOCATIONS WILL BE SHOWERY. AT THIS POINT THE PROBABILITY OF
RAIN IN LAS VEGAS IS LESS THAN 10% ON SATURDAY NIGHT AND 10 TO 20%
ON SUNDAY. SOUTHWEST WINDS WILL INCREASE ON SATURDAY AFTERNOON WITH
THE GEFS INDICATING THE STRONGEST WINDS THEN BUT THE EPS KEEPS
STRONGER SOUTHWEST WINDS LINGER THROUGH SUNDAY. WITH THE INCREASED
MIXING, SATURDAY IS EXPECTED TO BE THE WARMEST DAY OF THE WEEK WITH
READINGS AROUND 10-12 DEGREES ABOVE NORMAL. ALL IN ALL THE ENSEMBLES
ARE FAIRLY CONSISTENT WITH THIS SYSTEM WITH THE MAIN DIFFERENCES IN
THE STRENGTH AND TIMING.
AVIATION...FOR HARRY REID
LIGHT AND VARIABLE WINDS WILL PERSIST
AT THE FIELD THROUGH THE AFTERNOON BEFORE A WEAK FRONT MOVES THROUGH
THE VALLEY THIS EVENING, SHIFTING WINDS TO THE NORTHWEST. A BRIEF
INCREASE IN SPEEDS IS LIKELY ONCE THE WIND SHIFTS, BUT THERE IS A
GREATER THAN 80 PERCENT CHANCE THAT SPEEDS WILL REMAIN LESS THAN 80
KNOTS. WINDS SHOULD FALL BELOW 8 KNOTS AFTER MIDNIGHT AND THEN
GRADUALLY TURN TO THE NORTHEAST BY DAYBREAK. LIGHT NORTHEAST WINDS
WILL CONTINUE TOMORROW AFTERNOON BEFORE TURNING SOUTHWEST AROUND
SUNSET TOMORROW EVENING. VFR CONDITIONS WILL PREVAIL THROUGH
TUESDAY WITH FEW TO SCT CLOUDS WITH BASES AOA 15KFT AGL EXPECTED.
LOOKING AHEAD, HIGH PRESSURE WILL BUILD OVER THE AREA FOR THE SECOND
HALF OF THE WORK WEEK, KEEPING WINDS MAINLY 10 KNOTS OR LESS THROUGH
FRIDAY. THE NEXT STORM SYSTEM WILL BRING INCREASING SOUTHWEST WINDS
AND THE CHANCE OF PRECIPITATION TO THE REGION LATE SATURDAY INTO
MONDAY.
FOR THE REST OF SOUTHERN NEVADA, NORTHWEST ARIZONA AND SOUTHEAST
CALIFORNIA...MOST AREAS WILL SEE LIGHT WINDS THROUGH THIS AFTERNOON
BEFORE TURNING TO THE NORTH THIS EVENING AND OVERNIGHT. KDAG WILL
BE THE EXCEPTION, WITH GUSTY WESTERLY WINDS OF AROUND 40 KNOTS THAT
CONTINUE INTO THE EVENING BEFORE DECREASING. BREEZY SOUTHERLY WINDS
CAN ALSO BE EXPECTED IN THE LOWER COLORADO RIVER VALLEY, WHERE A FEW
GUSTS TO 20 KNOTS CAN BE EXPECTED. BESIDES THE RIVER VALLEY, WINDS
OF LESS THAN 12 KNOTS ARE EXPECTED AREA-WIDE ON TUESDAY. NORTHERLY
BREEZES WITH GUSTS TO 25 KNOTS CAN BE EXPECTED IN THE VALLEY. VFR
CONDITIONS WILL PREVAIL THROUGH TUESDAY WITH FEW TO SCT CLOUDS WITH
BASES AOA 15KFT AGL EXPECTED.
SPOTTER INFORMATION STATEMENT
SPOTTERS ARE ENCOURAGED TO REPORT
ANY SIGNIFICANT WEATHER OR IMPACTS ACCORDING TO STANDARD OPERATING
PROCEDURES.
SHORT TERM...CZYZYK
LONG TERM...CZYZYK
AVIATION...PLANZ
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