Area Forecast Discussion
Issued by NWS Las Vegas, NV

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS65 KVEF 230338 AFDVEF AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 738 PM PST SAT NOV 22 2014 .SYNOPSIS...A COLD FRONT PUSHING SOUTH ACROSS THE REGION TONIGHT WILL BRING COOLER AND WINDY CONDITIONS SUNDAY WITH THE STRONGEST WINDS ALONG THE COLORADO RIVER VALLEY FROM LAKE MOHAVE TO LAKE HAVASU. AN AREA OF HIGH PRESSURE SETTING UP OVER THE REGION EARLY IN THE COMING WEEK WILL BRING TRANQUIL WEATHER WITH TEMPERATURES CLIMBING A LITTLE ABOVE NORMAL TROUGH THANKSGIVING DAY AND THE FOLLOWING WEEKEND. && .UPDATE...AT 626 PM THE FILE MILE RAWS SITE IN THE SOUTHERN SIERRA OF INYO COUNTY REPORTED A GUST TO 59 MPH...IT`S HIGHEST GUST YET WITH THIS EVENT. THIS COMBINED WITH PILOT REPORTS OF MOUNTAIN WAVE ACTIVITY OVER THE SIERRA PROMPTED AN EXTENSION OF THE WIND ADVISORY FOR THE SIERRA THROUGH 06Z THIS EVENING. I ALSO REMOVED ANY MENTION OF PRECIPITATION FROM THE SIERRA THROUGH THE REMAINDER OF THE NIGHT AS LOW/MID LEVEL CLOUDS HAVE CLEARED FROM THE AREA. WINDS STILL GUSTING IN THE 35-45 MPH RANGE OVER THE WESTERN MOJAVE DESERT INCLUDING IN THE BARSTOW DAGGETT AREA AND THE WIND ADVISORY REMAINS IN PLACE. WILL CONTINUE TO MONITOR CONDITIONS OVERNIGHT AND ADDITIONAL UPDATES MAY BE NECESSARY. && .AVIATION...FOR MCCARRAN...WINDS EXPECTED TO BE A CHALLENGE BETWEEN 330Z AND 07Z OR 08Z IN ADVANCE OF AN APPROACHING COLD FRONT. GENERALLY LIGHT WINDS UNDER 10 KTS ARE EXPECTED HOWEVER THE DIRECTIONS MAY VARY QUITE A BIT. BEST ESTIMATE PLACES WINDS FROM A SOUTHWEST TO WEST DIRECTION DURING THIS TIME FRAME. A COLD FRONT SWEEPS ACROSS THE TERMINAL AREA BETWEEN 07Z AND 08Z. WINDS BEHIND THE FRONT WILL BE AROUND 10-16 KTS WITH GUSTS 15-25 KTS THROUGH SUNDAY MORNING. WINDS SHOULD THEN DECREASE SUNDAY AFTERNOON AND MAY TAKE ON A MORE NORTH OR NORTHEASTERLY DIRECTION. OUTSIDE OF WINDS NO OPERATIONALLY SIGNIFICANT CLOUDS/WEATHER IS EXPECTED. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...A COLD FRONT WILL SWEEP DOWN THROUGH SOUTHERN NEVADA AND SURROUNDING AREAS OVERNIGHT FOLLOWED BY GUSTY NORTHWEST TO NORTH WINDS. SOUTHWEST TO WEST WINDS OF 10-20 KTS AND GUSTS OF 25-30 KTS WILL OCCUR AHEAD OF THE FRONT ACROSS THE REGION THROUGH EARLY THIS EVENING. AREAS OF MECHANICAL TURBULENCE ARE POSSIBLE IN/AROUND THE OWENS VALLEY AND THE EASTERN MOJAVE DESERT THROUGH EARLY SUNDAY MORNING. WIND GUSTS OF 20-30 KTS CAN BE EXPECTED BEHIND THE FRONT ON SUNDAY ESPECIALLY IN THE COLORADO RIVER VALLEY FROM KIFP TO KHII. && .PREV DISCUSSION... ISSUED 305 PM PST SAT NOV 22 2014 .SHORT TERM...TONIGHT THROUGH MONDAY NIGHT...SOUTHWEST WINDS HAVE INCREASED ACROSS THE MOJAVE DESERT AHEAD OF A COLD FRONT THAT WILL SWEEP DOWN THROUGH THE GREAT BASIN AND SOUTHERN NEVADA OVERNIGHT. GUSTS OVER 50 MPH DEVELOPED AT THE BARSTOW-DAGGETT AIRPORT AROUND 22Z AND A WIND ADVISORY WAS ISSUED FOR THE WESTERN MOJAVE DESERT THROUGH 3 AM SUNDAY. ELSEWHERE GUSTS OF 20-30 MPH WERE COMMON. ISOLATED SHOWERS MAY BRUSH NORTHERN LINCOLN COUNTY THIS EVENING BUT THE MAIN STORY WILL BE GUSTY NORTHWEST TO NORTH WINDS DEVELOPING AS THE FRONT PUSHES DOWN THROUGH SOUTHERN NEVADA AND SURROUNDING AREAS OVERNIGHT. THE LATEST HIGH RES MODELS STILL INDICATE THE FRONT WILL MOVE THROUGH THE LAS VEGAS AREA AROUND MIDNIGHT LOCAL TIME THEN DOWN THROUGH SOUTHEAST SAN BERNARDINO/SOUTHERN MOHAVE COUNTIES BY 12Z SUNDAY. BRIEF GUSTS AROUND 40 MPH MAY OCCUR IMMEDIATELY FOLLOWING THE FRONT FOR SOME AREAS. NORTH WINDS DOWN THE COLORADO RIVER VALLEY WILL BE STRONGEST FROM COTTONWOOD COVE ON LAKE MOHAVE DOWN TO LAKE HAVASU WITH THE MAXIMA NEAR LAUGHLIN-BULLHEAD CITY...AS USUAL. A LAKE WIND ADVISORY WAS ISSUED FROM 9 AM TO 4 PM SUNDAY. WIND SPEEDS WILL DECREASE SUNDAY NIGHT BUT NORTH BREEZES OF 10-20 MPH WILL PERSIST MONDAY WITH GUSTS AROUND 30 MPH NEAR LAUGHLIN-BULLHEAD CITY. TEMPS WILL DROP AROUND 10 DEGREES SUNDAY WITH LITTLE CHANGE MONDAY. .LONG TERM...TUESDAY THROUGH FRIDAY...WEATHER WILL HAVE NO IMPACT ON HOLIDAY TRAVEL PLANS FOR THOSE HEADING IN AND OUT OF VEGAS. STRONG RIDGE ALONG THE WEST COAST TUESDAY PROGGED TO SHIFT INLAND ACROSS THE GREAT BASIN WEDNESDAY AND THURSDAY. ALL MODELS START TO BREAKDOWN THE RIDGE ON FRIDAY BUT DISAGREE ON THE STRENGTH/POSITION OF A TROUGH OVER THE EASTERN PACIFIC. WILL CONTINUE TO UNDERCUT MOS GUIDANCE HIGHS FOR THE VALLEYS DUE TO THE PRESENCE OF INVERSIONS WHICH WILL INHIBIT MIXING. WITH THAT BEING SAID, 61 DEGREES IS THE NORMAL HIGH FOR LAS VEGAS ON THURSDAY. THE CURRENT FORECAST IS FOR 68. THE REMAINDER OF THE SOUTHERN GREAT BASIN AND MOJAVE DESERT WILL ENJOY SIMILAR CONDITIONS WITH HIGHS RUNNING 6 TO 10 DEGREES ABOVE NORMAL. A NORTH WIND WILL LINGER DOWN THE COLORADO RIVER SOUTH OF LAKE MOHAVE TUESDAY AND WEDNESDAY THEN LESSEN ON THURSDAY AND FRIDAY. NO SIGNIFICANT WINDS ARE EXPECTED ELSEWHERE. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER ACCORDING TO STANDARD OPERATING PROCEDURES. && $$ UPDATE/AVIATION...WOLCOTT SHORT TERM........ADAIR LONG TERM.........PIERCE FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.