Area Forecast Discussion
Issued by NWS Las Vegas, NV

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000
FXUS65 KVEF 301546 AAA
AFDVEF

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAS VEGAS NV
845 AM PDT TUE SEP 30 2014

.SYNOPSIS...A DRY NORTHWEST FLOW WILL BE OVER THE AREA TODAY. 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...HIGH CLOUDS IN A NORTHWEST FLOW WILL DRIFT OVERHEAD AT
TIMES TODAY. OTHERWISE, WINDS WILL BE LIGHT WITH TEMPERATURES 2 TO 4
DEGREES WARMER THAN MONDAY.

WINDS WILL SHIFT TO THE NORTH TONIGHT INTO WEDNESDAY WITH THE
PASSAGE OF A DRY COLD FRONT. TEMPERATURES WILL COOL A FEW DEGREES
THURSDAY WHILE A NORTH WIND LINGERS THROUGH THURSDAY, ESPECIALLY
WITHIN THE COLORADO RIVER SOUTH OF HOOVER DAM. WILL TAKE A
CLOSER LOOK AT THE WIND WITH THE AFTERNOON PACKAGE ONCE ALL 12Z
MODEL DATA BECOMES AVAILABLE. NO UPDATE NECESSARY FOR THE REST OF
TODAY.
&&

.PREV DISCUSSION...
240 AM PDT TUE SEP 30 2014

.DISCUSSION...A DRY NORTHWEST FLOW WILL BE OVER THE AREA TODAY. A
SHORTWAVE TROUGH WHICH COULD BE SEEN CLEARLY ON WATER VAPOR OVER
WASHINGTON AND OREGON EARLY THIS MORNING WILL MOVE ACROSS NORTHEAST
NEVADA TONIGHT AND ACROSS UTAH WEDNESDAY. THIS WILL PUSH A COLD
FRONT SOUTH THROUGH OUR AREA TONIGHT AND WEDNESDAY LEADING TO SOME
BREEZY NORTH WINDS. TEMPERATURES WILL COOL SLIGHTLY BEHIND THE FRONT
IN THE NORTHERN PART OF THE CWA AND ACROSS SOUTHERN AREAS THURSDAY.
THERE MAY BE JUST ENOUGH MOISTURE AND MARGINAL INSTABILITY FOR A
SLIGHT CHANCE OF SHOWERS OVER NORTHEAST LINCOLN COUNTY TONIGHT AND
EARLY WEDNESDAY BUT ANY PRECIPITATION WILL BE VERY LIGHT.

.LONG TERM...FRIDAY THROUGH TUESDAY...LONGWAVE RIDGING WILL BE IN
PLACE THROUGH THE LONG TERM PERIOD. THIS WILL BRING LITTLE IN THE
WAY OF SENSIBLE WEATHER OUTSIDE OF SLIGHTLY ABOVE NORMAL
TEMPERATURES.
&&

.AVIATION...FOR MCCARRAN...MOSTLY CLEAR SKIES THROUGH THIS EVENING
WITH SOME HIGH CLOUDS AT TIMES. WIND SPEEDS 10 KTS OR LESS FAVORING
TYPICAL DIURNAL TRENDS...SOUTH/SOUTHWEST OVERNIGHT BECOMING LIGHT
EASTERLY THIS AFTERNOON. NORTHERLY WINDS WILL DEVELOP BEHIND A COLD
FRONT EARLY WEDNESDAY WITH SPEEDS APPROACHING 15 KTS BY MID DAY.

FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST
CALIFORNIA...SOME HIGH CLOUDS AT TIMES TODAY WITH TYPICAL DIURNAL
WIND PATTERNS. A BAND OF LOWER TO MID LEVEL CLOUDS ASSOCIATED WITH A
COLD FRONT WILL PUSH INTO MAINLY LINCOLN COUNTY TONIGHT WITH A
SLIGHT CHANCE OF SHOWERS OVER THE NORTHEAST PART OF THE COUNTY. THIS
FRONT WILL PUSH SOUTH THROUGH THE REGION TUESDAY NIGHT 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 MONDAY.
&&

$$

SHORT TERM/AVIATION...HARRISON
LONG TERM...WOLCOTT

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