220
FXUS66 KSTO 291150
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
400 AM PST SUN NOV 29 2009
DISCUSSION
LOCALLY GUSTY CONDITIONS CONTINUE ACROSS PORTIONS OF THE SIERRA
NEVADA RANGE. GUSTS OBSERVED RANGING WITHIN 35 TO 55 MPH. EASTERLY
GRADIENT BETWEEN RENO AND SACRAMENTO IS NEAR 8 MB AT THIS HOUR
CAUSING MODERATE TO STRONG OFFSHORE FLOW. NO CHANGES TO CURRENT WIND
ADVISORY...WINDS STILL EXPECTED TO LESSEN LATER THIS MORNING BY 10
AM.
A PLEASANT WEEKEND IN STORE FOR INTERIOR NORTHERN CALIFORNIA AS
HIGH PRESSURE BUILDS OVER THE REGION. BUMPED MAX TEMPS UP FOR THE
VALLEY TODAY SINCE YESTERDAY WAS FAIRLY WARM...TEMPS AROUND MID
60S. 850 MB TEMPS STILL SHOWING ABOUT A 5 DEGREE JUMP TODAY SO MAX
TEMPS SHOULD BE SIMILAR TO SLIGHTLY WARMER THAN YESTERDAY.
RIDGING WILL KEEP FAIRLY CLEAR SKIES OVER NORCAL THRU MONDAY NIGHT.
LACK OF CLOUDS OVERNIGHT WILL HELP TEMPS DROP TOWARDS THE LOW 30S
FOR THE NEXT FEW NIGHTS. THAT COULD TRANSLATE TO SOME PATCHY FROST
DURING EARLY MORNING HOURS. MAX DAYTIME HIGHS WILL TREND LOWER AGAIN
FOR MONDAY INTO MIDWEEK AS VALLEY STAYS IN THE LOW 60S. JBB
EXTENDED DISCUSSION (THURSDAY THROUGH SUNDAY)
HIGH PRESSURE WILL REMAIN OVER THE REGION FOR DRY WEATHER THURSDAY
AND FRIDAY OF THIS WEEK. THERE IS A LOT OF UNCERTAINTY IN THE
WEATHER PATTERN FOR NEXT WEEKEND. MODELS DIFFER WITH POSITIONS OF
SYSTEMS...EITHER BRINGING A COUPLE THROUGH FROM THE WEST OF
RETROGRADING A SYSTEM FROM OVER IDAHO BACK OVER THE REGION. EITHER
WAY THE IF EITHER SOLUTION WORKS OUT THEN THERE COULD BE SOME
UNSETTLED WEATHER OVER THE REGION. IF THE LATTER SOLUTION WORKS OUT
THEN SOME COLD WEATHER COULD BE ADVECTING INTO THE REGION FOR NEXT
WEEKEND AS WELL.
AVIATION
VFR CONDITIONS ACROSS THE AREA OVER THE NEXT 24 HOURS.
NORTHEAST TO EAST WIND GUSTS TO AROUND TO 35-50 KT OVER HIGHER
TERRAIN AND THROUGH CANYONS THROUGH 18Z MORNING. LCL SFC WND GUSTS
THROUGH THE DELTA TO 30KT TIL 18Z.
STO WATCHES/WARNINGS/ADVISORIES
...WIND ADVISORY UNTIL 10 AM PST THIS MORNING FOR WEST SLOPE
NORTHERN SIERRA NEVADA-WESTERN PLUMAS COUNTY/LASSEN
PARK-NORTHEAST FOOTHILLS/SACRAMENTO VALLEY.
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