Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 010410
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
910 PM PDT TUE SEP 30 2014

.SYNOPSIS...A WEAK DISTURBANCE AND ASSOCIATED COLD FRONT WILL MOVE
SOUTHEAST ACROSS THE AREA TONIGHT INTO WEDNESDAY. THIS WILL LEAD TO
LOCALLY GUSTY NORTH WINDS WEDNESDAY AND THURSDAY WITH SLIGHTLY
COOLER TEMPERATURES. HIGH PRESSURE BUILDING OVERHEAD THIS WEEKEND
WILL PRODUCE DRY AND WARM WEATHER.
&&

.UPDATE...THE APPROACHING COLD FRONT COULD BE SEEN ON RECENT
SATELLITE LOOPS AND SURFACE OBS PUSHING DOWN THROUGH CENTRAL NEVADA
THIS EVENING. FAIRLY EXTENSIVE LOW TO MID CLOUDS WERE ENHANCING FROM
ESMERALDA COUNTY TO NORTHERN LINCOLN COUNTY. NORTH WINDS JUST
DEVELOPED AT BISHOP CALIFORNIA AT 04Z AND THIS IS RIGHT ON TRACK
WITH THE EXPECTED TIMING. THE LATEST NAM WIND FIELDS INDICATE NORTH
WINDS WILL SPREAD ACROSS ALL OF FAR SOUTHERN NEVADA BETWEEN 15Z AND
18Z WITH GUSTS OF 25-30 MPH...WHICH IS IN LINE WITH THE GOING WIND
GRIDS. A MINOR ADJUSTMENT TO THE SKY COVER GRIDS WAS MADE BASED ON
THE LATEST SATELLITE TRENDS OVER CENTRAL NEVADA BUT THE REST OF THE
FORECAST LOOKS ON TRACK.
&&

.PREV DISCUSSION...
141 PM PDT TUE SEP 30 2014

TEMPERATURES RUNNING 3 TO 5 DEGREES WARMER IN SOUTHERN NEVADA AND
NORTHWEST ARIZONA FROM YESTERDAY, WHILE BISHOP AND BARSTOW
CALIFORNIA WARMER BY ABOUT 8 DEGREES.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS HAVE DEVELOPED ALONG
THE COLD FRONT IN NORTHEAST NEVADA AND NORTHWEST UTAH. AS FRONT
SLIDES SOUTH TONIGHT MODELS STILL GENERATING VERY LIGHT QPF IN THE
FAR NORTHEAST CORNER OF LINCOLN COUNTY. NORTH WINDS BEHIND THE COLD
FRONT WILL BE ON A LINE FROM BISHOP EAST TO PIOCHE AROUND 9 PM THIS
EVENING. THE COLD FRONT SHOULD REACH LAS VEGAS AROUND 5 AM WEDNESDAY
WITH NORTHWEST WINDS INITIALLY INCREASING ACROSS THE NORTHWEST
VALLEY BEFORE OVERSPREADING THE ENTIRE VALLEY BY MID-MORNING
WEDNESDAY. THE FRONT WILL REACH KINGMAN BY EARLY AFTERNOON BEFORE
EXITING SOUTHERN SAN BERNARDINO/SOUTHERN MOHAVE COUNTIES EARLY
WEDNESDAY EVENING. AS THE SURFACE HIGH SHIFTS FURTHER EAST INTO THE
GREAT BASIN ON THURSDAY, STRONGEST WINDS WILL OCCUR SOUTH OF HOOVER
DAM WITHIN THE COLORADO RIVER VALLEY. AT THIS TIME, WIND SPEEDS LOOK
TO BE SUB-ADVISORY. COLD FRONT WILL BRING SLIGHT COOLING TO NORTHERN
AREAS WEDNESDAY WITH THURSDAY BEING THE COOLEST DAY FOR THE MOJAVE
DESERT.

FOR FRIDAY THROUGH TUESDAY, STRONG RIDGE OVER THE REGION WILL BRING
DRY WEATHER AND SLIGHTLY ABOVE NORMAL TEMPERATURES.
&&

.AVIATION...FOR MCCARRAN...NORTHERLY WINDS WILL DEVELOP BEHIND A
COLD FRONT IN THE NORTHWEST VALLEY AROUND 12Z WEDNESDAY THEN
OVERSPREAD THE REST OF THE VALLEY BY 16Z WEDNESDAY. SPEEDS WILL
APPROACH 15 KTS...WITH GUSTS UP TO 25 KTS POSSIBLE. MOSTLY CLEAR
SKIES TONIGHT AND WEDNESDAY.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...A BAND OF LOWER TO MID LEVEL CLOUDS ASSOCIATED WITH A
COLD FRONT WILL PUSH ACROSS CENTRAL NEVADA OVERNIGHT WITH A SLIGHT
CHANCE OF SHOWERS OVER NORTHEAST LINCOLN COUNTY. THIS FRONT WILL
PUSH SOUTH THROUGH THE REGION TONIGHT AND WEDNESDAY WITH NORTH WINDS
DEVELOPING BEHIND IT WITH SPEEDS 10-20 KTS. LOCAL GUSTS TO 30 KTS IN
AREAS WHICH FAVOR NORTH WINDS.
&&

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED THROUGH TUESDAY.
&&

$$

UPDATE...ADAIR
PREV DISCUSSION...PIERCE

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