Area Forecast Discussion
Issued by NWS Las Vegas, NV

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000 FXUS65 KVEF 292143 AFDVEF AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 243 PM PDT FRI MAY 29 2015 .SYNOPSIS...THE HOTTEST WEATHER SO FAR THIS YEAR IS EXPECTED OVER THE WEEKEND WITH HIGHS APPROACHING RECORD LEVELS IN SOME AREAS. TEMPERATURES WILL SLOWLY RETURN TO NEAR NORMAL BY THE MIDDLE OF NEXT WEEK WITH INCREASING AFTERNOON BREEZES AS A WEAK TROUGH OF LOW PRESSURE MOVES OVER THE WESTERN STATES. && .SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT. LINGERING MOISTURE AND INSTABILITY OVER EAST CENTRAL NEVADA AND NORTHWEST ARIZONA WILL PRODUCE A FEW SHOWERS AND THUNDERSTORMS THROUGH EARLY THIS EVENING BEFORE IT IS PUSHED TO THE NORTHEAST BY A STRONG RIDGE MIGRATING INLAND FROM THE WEST COAST. THIS WILL BRING A TASTE OF SUMMERLIKE TEMPERATURES WITH HIGH TEMPS APPROACHING RECORD LEVELS FOR SOME AREAS SATURDAY AND ESPECIALLY SUNDAY. THE RIDGE AXIS IS FORECAST TO MOVE OVERHEAD SATURDAY THEN CONTINUE MIGRATING EAST OVER UTAH AND THE INTERMOUNTAIN REGION BY SUNDAY AHEAD OF A LOW PRESSURE SYSTEM APPROACHING NORTHERN CALIFORNIA. SOME THIN CIRRUS WILL MOVE OVER THE REGION TONIGHT AND SATURDAY WITH THE RIDGE BUT SHOULD NOT BE DENSE ENOUGH TO LIMIT SUNSHINE. INCREASING SOUTH- SOUTHWEST BREEZES SUNDAY AFTERNOON AHEAD OF THE PACIFIC NORTHWEST TROUGH WILL AID BOUNDARY LAYER MIXING AND PRODUCE THE HOTTEST DAY OF THE FORECAST PERIOD. WITH HIGHS OF 104-110 ACROSS MUCH OF THE MOJAVE DESERT REGION. SOME TWEAKS WERE MADE TO MINIMUM TEMPERATURE GRIDS BASED ON OBSERVED TRENDS...OTHERWISE LITTLE CHANGE WAS NEEDED TO THE PREVIOUS FORECAST. .LONG TERM...MONDAY THOUGH FRIDAY. AFTER A SCORCHING WEEKEND GENERAL WEAK TROUGHING WILL TAKE OVER THE WESTERN US...LEADING TO SOME SLIGHT COOLING WITH TEMPERATURES RETURNING CLOSER TO NORMAL. LIFT AND MOISTURE ASSOCIATED WITH ANY SHORTWAVE ACTIVITY MOVING THROUGH FLOW SHOULD REMAIN WELL NORTH OF THE AREA...WITH ANY IMPACTS AROUND THE AREA LIMITED TO WIND AND HIGH CLOUDS...ESPECIALLY ON MONDAY. BOTH THE GFS AND EURO HINT AT MORE ENERGY COMING SOUTHWARD TOWARDS THE END OF NEXT WEEK. && .AVIATION...FOR MCCARRAN...WINDS WILL FAVOR TYPICAL DIURNAL TRENDS WITH SPEEDS GENERALLY LESS THAN 9 KNOTS THROUGH SATURDAY. TEMPS WILL REACH OR EXCEED 100F BOTH SATURDAY AND SUNDAY FOR A FEW HOURS DURING THE AFTERNOON AND EARLY EVENING. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...ISOLATED SHOWERS AND THUNDERSTORMS OVER EAST CENTRAL NEVADA AND NORTHWEST ARIZONA WILL DISSIPATE BY EARLY THIS EVENING. DRY CONDITIONS WITH WINDS FAVORING TYPICAL DIURNAL DIRECTIONAL TRENDS AT 10 KTS OR LESS CAN BE EXPECTED THROUGH SATURDAY UNDER CIRRUS CLOUDS. SLIGHTLY HIGHER SPEEDS ARE EXPECTED SUNDAY AFTERNOON AND EVENING WITH GUSTS OF 15-25 KTS POSSIBLE ESPECIALLY IN AND AROUND KDAG. && .SPOTTER INFORMATION STATEMENT...SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. && $$ SHORT TERM/AVIATION...ADAIR LONG TERM...STEELE FOR MORE FORECAST INFORMATION...SEE US ON OUR WEBPAGE: HTTP://WEATHER.GOV/LASVEGAS OR FOLLOW US ON FACEBOOK AND TWITTER

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