Area Forecast Discussion
Issued by NWS Las Vegas, NV

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FXUS65 KVEF 182210 CCA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
210 PM PST THU DEC 18 2014

.SYNOPSIS...A WEAK STORM SYSTEM WILL BRING CLOUDS AND A FEW SHOWERS
TO THE SIERRA AND SOUTHERN GREAT BASIN FRIDAY INTO FRIDAY NIGHT.
FOR THE WEEKEND AND INTO THE MIDDLE OF NEXT WEEK...HIGH PRESSURE
WILL REBUILD ACROSS THE REGION WITH WARMING TEMPERATURES AND DRY
WEATHER EXPECTED.

&&

.SHORT TERM...TONIGHT THROUGH FRIDAY.

A FEW LIGHT SHOWERS REMAIN THIS AFTERNOON ACROSS THE AREA BUT FOR
THE MOST PART THINGS ARE QUICKLY WINDING DOWN.  WITH THE LOSS OF
SOLAR HEATING THIS EVENING....WHAT SHOWER ACTIVITY REMAINS WILL
DIMINISH RAPIDLY AFTER SUNSET.

HIGH CLOUDS WILL BEGIN TO STREAM OVERHEAD IN ADVANCE OF THE NEXT
DISTURBANCE TO AFFECT THE AREA FRIDAY INTO FRIDAY NIGHT. THIS SYSTEM
IS VERY WEAK AND MOISTURE STARVED WITH ONLY SLIGHT CHANCES FOR
SHOWERS ACROSS THE HIGHEST TERRAIN OF THE SIERRA AND SOUTHERN GREAT
BASIN.  IT WILL HOWEVER BRING A BATCH OF MID AND HIGH LEVEL CLOUDS
TO THE REGION ON FRIDAY AND FRIDAY NIGHT.

LONG TERM...SATURDAY THROUGH THURSDAY.

BEGINNING SATURDAY A HIGH PRESSURE RIDGE WILL BEGIN TO INTENSIFY
OVER THE EASTERN PACIFIC. HIGH CLOUD COVER WILL CONTINUE TO STREAM
OVERHEAD AT TIMES BUT AS HEIGHTS RISE TEMPERATURES WILL BE ON THE
REBOUND EACH DAY...RISING INTO THE 60S BY SUNDAY.

MIDWEEK ONWARD...NORTHERN STREAM ENERGY DIVING SOUTH FROM WESTERN
CANADA LOOKS TO TRACK INTO THE INTERMOUNTAIN WEST DELIVERING A BLAST
OF COOLER TEMPERATURES LATE IN THE WEEK. HOW STRONG THIS WAVE IS HAS
BEEN DEBATED AMONG THE MAJOR FORECAST MODELS BUT EVEN AS AN OPEN
WAVE IT SHOULD DRAG A DECENT COLD FRONT THROUGH THE GREAT BASIN AND
INTO THE SOUTHWEST.  FOR NOW I HAVE KEPT THE FORECAST DRY BUT
TEMPERED TEMPERATURES DOWNWARD WITH THE PASSAGE OF THE COLD FRONT
NEXT THURSDAY.

&&

.AVIATION...FOR MCCARRAN...CIGS HAVE BEEN SLOW TO RISE TODAY BUT
HAVE RECENTLY RISEN ABOVE 5KFT. SHOULD SEE CLOUDS CONTINUE TO
DECREASE THROUGH THE EVENING WITH PRIMARILY JUST SCATTERED HIGH
CLOUDS AOA 25KFT OVERNIGHT WITH LIGHT DRAINAGE WINDS. INCREASING
CLOUDS ABOVE 15KFT CAN BE EXPECTED BY FRIDAY MORNING WITH LIGHT AND
VARIABLE WINDS EXPECTED.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...DECREASING CLOUDS EXPECTED OVERNIGHT WITH THE EXCEPTION
OF SCATTERED HIGH CLOUDS ABOVE 25K FT. INCREASING CLOUDS ARE
EXPECTED FRIDAY ABOVE 15K FT BUT WINDS WILL REMAIN LIGHT.

&&

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

$$

SHORT TERM/AVIATION...OUTLER
LONG TERM...OUTLER

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

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











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