000
FXUS66 KSTO 151559
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
900 AM PDT WED OCT 15 2008
.DISCUSSION...
HIGH PRESSURE REMAINS IN CONTROL OVER NORTHERN CALIFORNIA. A TROUGH
OF LOW PRESSURE IS APPROACHING THE PACIFIC NORTHWEST...ALTHOUGH THIS
WILL ONLY BRING HIGH CLOUDS TO THE FORECAST AREA. TEMPERATURES THIS
AFTERNOON SHOULD BE COMPARABLE TO YESTERDAY AND PERSISTENCE SHOULD
HOLD TRUE THROUGH FRIDAY. THIS RIDGE WILL BEGIN TO SHIFT EASTWARD
FRIDAY AS A WEAK SHORTWAVE APPROACHES CALIFORNIA FROM THE SOUTHWEST.
THIS SYSTEM SHOULD BRING SLIGHTLY COOLER TEMPERATURES ALTHOUGH
PRECIPITATION SHOULD REMAIN TO THE SOUTH OF OUR FORECAST AREA. A
STRONGER SYSTEM IS EXPECTED TO MOVE THROUGH THE AREA MONDAY AND INTO
TUESDAY. THE 06Z GFS AND ECMWF RUNS KEEP THE BULK OF THE ENERGY
NORTH OF GREATER SACRAMENTO...BUT THE TREND WITH THE LAST FEW RUNS
HAS BEEN TO SPREAD THE CHANCE OF PRECIPITATION SOUTHWARD. RUN-TO-RUN
CONSISTENCY AND THE GFS ENSEMBLE SPREAD SUGGEST THAT THERE IS STILL
CONSIDERABLE UNCERTAINTY ON THE HANDLING OF THIS SYSTEM. THIS FRONT
WILL CLEAR THROUGH THE AREA BY TUESDAY AND DRY NORTHERLY WINDS WILL
DEVELOP BEHIND IT AS ANOTHER RIDGE OF HIGH PRESSURE BUILDS IN. DANG
&&
.AVIATION...
VFR CONDITIONS ACROSS THE AREA WILL CONTINUE THROUGH TODAY INTO
TONIGHT. HIGH CLOUDS WILL SPREAD SOUTHWARD AND INCREASE OVER THE
REGION TODAY. GENERALLY LIGHT WINDS EXPECTED.
&&
.STO WATCHES/WARNINGS/ADVISORIES...NONE.
&&
$$
