451   
FXUS66 KSTO 102126  
AFDSTO  
  
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SACRAMENTO CA  
226 PM PDT SUN AUG 10 2025  
   
DISCUSSION  
  
   
SYNOPSIS  
  
WIDESPREAD MODERATE HEATRISK AND LOCAL MAJOR HEATRISK IN THE  
FOOTHILLS CONTINUES INTO MONDAY WITH TRIPLE DIGIT HIGHS IN THE  
VALLEY. TEMPERATURES COOL TO MORE SEASONABLE LEVELS TUESDAY, SLIGHTLY  
BELOW NORMAL BY MIDWEEK AND THEN CONTINUE TO TREND LOWER INTO THE  
WEEKEND. DRY WEATHER CONTINUES.  
  
  
   
KEY MESSAGES  
  
*TODAY:  
 - WELL ABOVE NORMAL TEMPERATURES CONTINUE AS UPPER LEVEL RIDGING  
   REMAINS OVER THE REGION   
TEMPERATURES REMAIN HOT ON MONDAY WITH  
   WIDESPREAD MODERATE HEATRISK AND LOCAL MAJOR HEATRISK ACROSS   
   THE VALLEY AND FOOTHILLS AND INTO THE MOUNTAINS  
 - PROBABILITY OF HIGH TEMPERATURES > 100F:   
   --NORTHERN SACRAMENTO VALLEY: 80-100%  
   --REMAINDER OF THE VALLEY: 35-75%  
 - A WEAK DELTA BREEZE WILL BRING SLIGHTLY COOLER LOW TEMPERATURES  
   TONIGHT INTO MONDAY MORNING TO INFLUENCED AREAS, WITH ELEVATED  
   MINIMUM TEMPERATURES CONTINUING ELSEWHERE, ESPECIALLY IN THE   
   FOOTHILLS AND NORTHERN SACRAMENTO VALLEY.   
 - PROBABILITY OF HIGH TEMPERATURES > 100F:  
   --NORTHERN SACRAMENTO VALLEY: 90-100%  
   --REMAINDER OF THE VALLEY: 40-90%  
  
*TUESDAY-WEDNESDAY:  
 - THE EAST PACIFIC RIDGE AXIS ALOFT SHIFTS WESTWARD BY TUESDAY AS  
   AN UPPER TROUGH FROM WESTERN CANADA DROPS DOWN. THIS WILL   
   BRING INCREASED ONSHORE FLOW AND COOLER TEMPERATURES, BUT LACKS  
   MOISTURE, WITH DRY WEATHER CONTINUING  
 - THE INCREASED DELTA BREEZE WILL GIVE SOME RELIEF WITH FOR THE  
   DELTA AND SOUTHERN SACRAMENTO VALLEY, ESPECIALLY BY WEDNESDAY  
   MORNING   
 - SEASONABLE HIGH TEMPERATURES RETURN FOR TUESDAY, NEAR TO  
   SLIGHTLY BELOW NORMAL HIGHS BY WEDNESDAY  
    
*THURSDAY TO LATE THIS WEEK:  
 - TEMPERATURES CONTINUE TO TREND LOWER MID TO LATER WEEK,  
   SLIGHTLY BELOW AVERAGE THURSDAY AND CONTINUING TO TREND LOWER   
   INTO THE WEEKEND   
 - PERIODICALLY BREEZY ONSHORE FLOW CONTINUES THROUGH THE WEEK  
   INTO NEXT WEEKEND  
 - DRY WEATHER CONTINUES  
    
CHANGES FROM PREVIOUS FORECAST  
  
- LITTLE CHANGE.   
   
  
   
AVIATION  
  
VFR CONDITIONS EXPECTED TO PREVAIL NEXT 24 HOURS ACROSS INTERIOR   
NORTHERN CALIFORNIA. SUSTAINED SURFACE WINDS GENERALLY 12 KTS OR   
LESS AT TAF SITES. WEST-SOUTHWEST WIND GUSTS 15-25 KTS THROUGH THE  
DELTA 00Z-12Z MONDAY.  
  
  
   
STO WATCHES/WARNINGS/ADVISORIES  
  
NONE.  
  
  
  
 
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