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 300422 AFDVEF AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAS VEGAS NV 822 PM PST THU JAN 29 2015 .SYNOPSIS...RAIN CHANCES WILL INCREASE TONIGHT AND CONTINUE THROUGH FRIDAY NIGHT...THEN END FROM NORTH TO SOUTH ON SATURDAY AS THE STORM SLOWLY MOVES AWAY TO THE SOUTHEAST. DRY WEATHER IS LIKELY FOR THE FIRST FEW DAYS OF FEBRUARY WITH ABOVE NORMAL TEMPERATURES. && .UPDATE...LIGHT RAIN IS NOW BEING REPORTED ACROSS PORTIONS OF SAN BERNARDINO AND MOHAVE COUNTIES THIS EVENING INCLUDING TWENTYNINE PALMS AND KINGMAN. EXPECT RAIN TO CONTINUE TO SLOWLY INCREASE IN COVERAGE THROUGH FRIDAY MORNING FROM SOUTHEAST TO NORTHWEST AS A BROAD UPPER LEVEL LOW SHIFTS DRAWS MOISTURE INTO THE REGION. AT THIS TIME IT LOOKS LIKE RAIN MAY BE A FACTOR DURING THE MORNING RUSH HOUR IN LAS VEGAS WITH RAIN STARTING IN THE 5AM-8AM TIME FRAME. MADE SOME TWEAKS TO POP/QPF/SKY GRIDS INTO FRIDAY BASED ON THE LATEST OBSERVATIONS AND SHORT TERM GUIDANCE. WILL CONTINUE TO MONITOR AND FURTHER UPDATES MAY BE NECESSARY. && .PREV DISCUSSION... 207 PM PST THU JAN 29 2015 .SHORT TERM...THROUGH SATURDAY NIGHT...FORECAST IS STILL ON TRACK WITH MINIMAL CHANGES FROM PREVIOUS SHIFTS. PRECIP CHANCES WILL INCREASE OVER MOHAVE COUNTY AND THE COLORADO RIVER AREA OVERNIGHT AND THEN SPREAD ACROSS MOST OF THE CWA FRIDAY AND FRIDAY NIGHT AS LOW PRESSURE MOVES FROM THE BAJA INTO SOUTHERN CALIFORNIA AND DEEPENS. HIGH PRESSURE THEN NOSES IN FROM THE NORTHWEST...PUSHING THE MOISTURE BACK SOUTHEAST AND ENDING RAIN CHANCES FROM NORTHWEST TO SOUTHEAST ON SATURDAY. SKIES SHOULD CLEAR IN MOST AREAS SATURDAY NIGHT...LEADING TO THE POSSIBILITY OF FOG SUNDAY MORNING IN AREAS WHICH RECEIVE SIGNIFICANT RAIN FRIDAY. THE MAIN NEGATIVE FACTOR FOR FOG DEVELOPMENT WILL BE NORTH WINDS WHICH ARE EXPECTED TO INCREASE AS THE STORM PULLS AWAY TO THE SOUTHEAST. .LONG TERM...SUNDAY THROUGH THURSDAY...HIGH PRESSURE WILL BE THE DOMINANT FEATURE DURING THE EXTENDED PERIOD. THERE WILL BE A WEAK DISTURBANCE THAT WILL BRIEFLY WEAKEN THE RIDGE MONDAY...BUT ANY IMPACTFUL WEATHER WILL REMAIN OVER UTAH. OTHERWISE...MAINLY LIGHT WINDS...OCCASIONAL HIGH CLOUDS AND TEMPERATURES A FEW DEGREES ABOVE NORMAL WILL BE THE MAIN STORY. && .AVIATION...FOR MCCARRAN...CEILING HEIGHT WILL DROP BETWEEN MIDNIGHT AND SUNRISE...WITH RAIN CHANCES INCREASING RAPIDLY AROUND SUNRISE. IT APPEARS THAT THE BEST CHANCE OF THE LOWEST CEILING AND VISIBILITY WILL BE FRIDAY AFTERNOON INTO FRIDAY NIGHT...WITH CEILINGS POSSIBLY UNDER 2000 FEET AND VISIBILITY POSSIBLY TWO MILES OR LESS IN RAIN AND FOG. IMPROVING CEILINGS AND VISIBILITIES ARE EXPECTED ON SATURDAY...BUT NORTH TO NORTHEAST WINDS COULD CAUSE RUNWAY CONFIGURATION ISSUES. THERE IS AN OUTSIDE CHANCE OF FOG SUNDAY MORNING...BUT IF THE WIND STAYS UP IT WILL PREVENT FOG FORMATION. MUCH BETTER CONDITIONS ARE EXPECTED FROM SUNDAY ONWARD. FOR THE REST OF SOUTHERN NEVADA...NORTHWEST ARIZONA...AND SOUTHEAST CALIFORNIA...CLOUDS WILL LOWER AND THICKEN BEGINNING TONIGHT...WITH RAIN CHANCES INCREASING OVER MOHAVE COUNTY TONIGHT AND SPREADING ACROSS THE ENTIRE AREA ON FRIDAY. LOW CEILINGS...POOR VISIBILITY...AND MOUNTAIN OBSCURATIONS WILL ALL BE ISSUES ON FRIDAY. RAIN CHANCES WILL END FROM NORTH TO SOUTH SATURDAY AND SATURDAY NIGHT. FOG WILL BE POSSIBLE SUNDAY MORNING IN AREAS WHICH RECEIVE SIGNIFICANT RAIN ON FRIDAY. OTHERWISE...MUCH BETTER CONDITIONS ARE EXPECTED FROM SUNDAY ONWARD. && .SPOTTER INFORMATION STATEMENT...SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. SPOTTERS ARE ENCOURAGED TO REPORT ANY SIGNIFICANT RAIN OR SNOW...ESPECIALLY ON FRIDAY. && $$ UPDATE...WOLCOTT PREV DISCUSSION...MORGAN/GORELOW 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.