833  
FXUS66 KSTO 302157  
AFDSTO  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
257 PM PDT THU MAR 30 2017  
   
SYNOPSIS
 
 
LIGHT SCATTERED RAIN AND SNOW SHOWERS FOR THE SIERRA WITH GUSTY  
WINDS IN THE VALLEY THROUGH THE EVENING. WINDY CONDITIONS RETURN  
FRIDAY FOR THE VALLEY. SEASONABLY DRY WEATHER ANTICIPATED FOR  
SATURDAY WITH CHANCES FOR LIGHT RAIN OVER THE MOUNTAINS LATE  
SUNDAY AND SUNDAY NIGHT.  
 

 
   
DISCUSSION (TODAY THROUGH SUNDAY)
 
 
THE MAIN UPPER LEVEL TROUGH BASE HAS NOW PASSED BY THE FORECAST  
AREA, AND THE ASSOCIATED AREAS OF RAIN AND SNOW HAVE MAINLY ENDED.  
A FEW LINGERING SCATTERED LIGHT RAIN AND SNOW SHOWERS CONTINUE TO  
LINGER FOR THE SIERRA, BUT SCATTERED PRECIPITATION SHOULD DIMINISH  
BY THIS EVENING.  
 
STRONGER MID TO LOWER LEVEL JET CONTINUES TO MOVE ACROSS NORTHERN  
CALIFORNIA BEHIND THE PASSING TROUGH, WHICH WILL BRING WINDY  
CONDITIONS FOR THE VALLEY THROUGH THE EVENING HOURS. WIND GUSTS SO  
FAR THIS AFTERNOON HAVE BEEN IN THE LOWER 30 MPH RANGE, BUT A FEW  
OCCASIONAL GUSTS BETWEEN 35 AND 40 MPH ARE POSSIBLE. WINDY  
CONDITIONS WILL RETURN AGAIN FRIDAY AFTERNOON AS A NEAR REPEAT IN  
LOWER TO MID LEVEL JET WINDSPEEDS ARE EXPECTED FOR THE VALLEY.  
 
SEASONABLE AND DRY WEATHER WILL OCCUR SATURDAY AND AS AN UPPER  
LEVEL TROUGH BUILDS ACROSS THE WEST, BUT ANOTHER SHORTWAVE  
DISTURBANCE WILL MOVE ACROSS THE PACIFIC NORTHWEST ON SUNDAY.  
SMALL HEIGHT FALLS ASSOCIATED WITH THE PASSING TROUGH WILL CREATE  
SOME CHANCES FOR LIGHT RAIN, MAINLY FOR THE NORTHERN SACRAMENTO  
VALLEY AND THE SIERRA. LIGHT SNOW WILL OCCUR FOR ELEVATIONS HIGHER  
THAN 5000 FEET WITH ACCUMULATIONS LESS THAN ONE INCH.  
 

 
 
.EXTENDED DISCUSSION (MONDAY THROUGH THURSDAY)  
 
MODELS POINT TO STRONG UPPER RIDGING OVER INTERIOR NORCAL THROUGH  
THE FIRST HALF OF NEXT WEEK WITH DRY WEATHER AND ABOVE NORMAL HIGH  
TEMPERATURES. MODELS HAVE TRENDED TO A SLOWER PROGRESSION OF THE  
THE RIDGING AND UPSTREAM TROUGH. WEATHER LOOKS TO REMAIN DRY  
THROUGH WEDNESDAY AND POSSIBLY INTO THURSDAY. POTENTIAL FOR  
ATMOSPHERIC RIVER TO SETUP OVER THE FORECAST AREA FRIDAY INTO THE  
WEEKEND.  
 

 
   
AVIATION
 
 
STG NLY FLOW ALF AS UPR RDG IN EPAC BLDS INLD. VFR CONDS OVR  
INTR NORCAL NXT 24 HRS. LCL NLY SFC WND GSTS TO 25 KTS TNGT THEN  
AREAS UP TO 35 KTS POSS FRI AFT 15Z.  
 

 
   
STO WATCHES/WARNINGS/ADVISORIES
 
 
WIND ADVISORY UNTIL 8 PM PDT THIS EVENING FOR CARQUINEZ STRAIT  
AND DELTA-CENTRAL SACRAMENTO VALLEY-MOUNTAINS SOUTHWESTERN  
SHASTA COUNTY TO NORTHERN LAKE COUNTY-NORTHERN SACRAMENTO VALLEY-  
NORTHERN SAN JOAQUIN VALLEY-SOUTHERN SACRAMENTO VALLEY.  
 

 
 

 
 
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