SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NWS LOS ANGELES/OXNARD CA
AFDLOX 909 PM THU APR 19 2001
IN THE SHORT TERM...UPR TROUGH AXIS PASSING THROUGH LA COUNTY HAS
SUFFICIENTLY MIXED OUT THE MARINE LAYER. CLOUDS MOST NUMEROUS OVER
THE MTNS DUE TO OROGRAPHIC LIFT...BUT LITTLE CLOUD COVER ELSEWHERE.
THE 00Z KVBG SOUNDING SHOWED NO INVERSION AND ACARS OUT OF LAX AND
LGB SHOWING ONLY VERY WEAK INVERSION. HAD WIDELY SCATTERED TO
SCATTERED LIGHT SHOWER ACTIVITY EARLIER...BUT RECENT RADAR FRAMES
SHOWING COVERAGE OVER EAST LA MTNS DIMINISHING QUICKLY. WILL UPDATE
ZONES THIS EVENING TO REMOVE POPS AND ADJUST SKY CON TO PARTLY
CLOUDY IN NON-MTN ZONES.
HAVING A WEAK SUNDOWNER THIS EVENING IN SBA COUNTY WITH -2.6
SBA-SMX GRADIENT. LOOKS LIKE WINDS SHOULD STAY BELOW ADVISORY
CRITERIA.
AVN A LITTLE FASTER AND STRONGER WITH THE NEXT UPPER SYSTEM
CURRENTLY WEST OF OREGON. BUT REGARDLESS...THE CORE OF THE SYSTEM
STILL EXPECTED TO TO TRACK INLAND AND TOTAL QPFS GENERALLY LESS
THAN A HALF INCH. STILL LOOKS GOOD FOR MTN SNOWS WITH SNOW LEVEL
LOWERING TO UNSEASONABLY LOW LEVELS. CURRENT FCST PACKAGE HAS THIS
HANDLED WELL.
IN THE EXTENDED...UPR RIDGE BUILDS OVER CA SUN THRU WED...PROVIDING
A NICE WARMING TREND. HEIGHTS FALL WED INTO THUR KNOCKING TEMPS
DOWN A LITTLE.
LAX 0246. MOYER.
.LAX...SMALL CRAFT ADVISORY (SEE LAXCWFLAX).