Area Forecast Discussion
Issued by NWS Las Vegas, NV

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000
FXUS65 KVEF 252220
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
220 PM PST TUE NOV 25 2014

.SYNOPSIS...
HIGH PRESSURE WILL BRING DRY AND SUNNY CONDITIONS TO THE AREA
THROUGH THE HOLIDAY WEEKEND. A STORM SYSTEM AFFECTING MUCH OF THE
WEST COAST IS EXPECTED EARLY NEXT WEEK.
&&

.SHORT TERM [TONIGHT THROUGH SATURDAY]...
A RATHER STRONG HIGH PRESSURE RIDGE WILL REMAIN IN PLACE OVER THE
WEST COAST OF THE UNITED STATES THROUGH THE EARLY PORTION OF THE
THANKSGIVING WEEKEND (THU-FRI). A STORM SYSTEM WILL BEGIN TO PUSH IN
FROM THE NORTH PACIFIC AND BEGIN TO BREAKDOWN THE AFORE MENTIONED
RIDGE AND BEGIN TO INCREASE WESTERLY WINDS ACROSS THE AREA INTO
SATURDAY. ALL-IN-ALL IT APPEARS THAT THE SHORT TERM PERIOD WILL BE
FREE OF ANY ADVERSE WEATHER AS SUNNY SKIES AND ABOVE NORMAL
TEMPERATURES WILL PREVAIL.

.LONG TERM [SUNDAY THROUGH TUESDAY]...
THE STORM SYSTEM MOVING IN FROM THE PACIFIC NORTHWEST IS LOOKING
MORE LIKELY AS WE GET CLOSER TO THE EVENT. COMPUTER MODELS HAVE BEEN
JUMPING AROUND WITH REGARD TO THE EXACT EVOLUTION OF THE STORM.
YESTERDAY THE GFS AND ECMWF BOTH WERE FORECASTING A CLOSED UPPER
LEVEL LOW PRESSURE TO DROP SOUTH ALONG THE CALIFORNIA COAST. ON
LAST NIGHTS COMPUTER MODEL RUN THE GFS WAS THE FIRST TO INDICATE
THAT THE NORTHERN STREAM AND SOUTHERN STREAM SHORT WAVES WOULD NOT
PHASE AND THUS KEEP THE LOW AN OPEN WAVE THAT PROGRESSED THROUGH THE
AREA A BIT QUICKER. THIS PUT THE GFS AT ODDS WITH THE ECMWF. THE 12Z
ECMWF HAS NOW JUMPED TO AN OPEN WAVE SOLUTION LIKE THE GFE. IF
CURRENT TRENDS HOLD...THIS WILL GIVE US ADDITIONAL CONFIDENCE THAT
THE AFFECTS OF THIS STORM WILL BE WINDS AND MAYBE SOME MOUNTAIN
SNOWS...RATHER THAN A MORE WET FORECAST WITH THE CLOSED LOW. THE
NEXT 24 MORE HOURS WILL TELL US A BIT MORE. IF YOU ARE TRAVELING
THIS WEEKEND THEN YOU CAN FOLLOW INFORMATION ON THIS STORM BY
SEARCHING #LEFTOVERSWX ON TWITTER AND FACEBOOK. WESTERN REGION
OFFICES HAVE AGREED TO USE THIS HASHTAG TO SEND UPDATES ON THE
STORM. &&

.AVIATION...
FOR MCCARRAN...SOUTHWEST WINDS UP TO 10KTS EXPECTED AFTER 01Z. LIGHT
WINDS EXPECTED AGAIN ON WEDNESDAY. ASOS WINDS WILL REMAIN SOUTH-
SOUTHWEST WHILE MIDFIELD SENSOR WINDS WILL BE EASTERLY DURING THE
DAY. NO OPERATIONALLY SIGNIFICANT WEATHER EXPECTED.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA....VFR CONDITIONS AND LIGHT WINDS EXPECTED THROUGH
FRIDAY. THE ONLY EXCEPTION IS STRONGER WINDS DOWN THE COLORADO RIVER
VALLEY TONIGHT THROUGH TOMORROW.
&&

.SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
&&

$$

LERICOS

FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE:

HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER










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