977  
FXUS66 KHNX 272110  
AFDHNX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA  
210 PM PDT THU APR 27 2017  
   
SYNOPSIS
 
BREEZY CONDITIONS WILL CONTINUE ACROSS THE REGION  
THROUGH FRIDAY. LIGHTER WINDS, WARMING TEMPERATURES AND DRY  
WEATHER WILL THEN PREVAIL THIS WEEKEND INTO EARLY NEXT WEEK AS  
HIGH PRESSURE STRENGTHENS OVER THE REGION.  
 

 
   
DISCUSSION
 
COOL AND DRY NORTHWEST FLOW PREVAILING OVER OUR  
AREA AT THIS TIME AS CENTRAL CA REMAINS SITUATED IN BETWEEN AN  
UPPER RIDGE CENTERED NEAR 135W AND A BROAD UPPER TROUGH OVER THE  
CENTRAL CONUS. SHORTWAVE ENERGY PUSHING INTO THE PAC NW AND  
DROPPING INTO THE GREAT BASIN IS CONTINUING TO BRING INCREASED  
NORTHWEST WINDS ALONG WITH INCREASED CLOUD COVER TO OUR AREA WITH  
SOME UPSLOPE PERSISTING OVER THE SOUTH END OF THE SAN JOAQUIN  
VALLEY AND THE FOOTHILLS AND VALLEY FACING SLOPES OF THE MOUNTAINS  
IN IN TULARE AND KERN COUNTIES. WIND GUSTS AT SOME LOCATIONS IN  
THE KERN COUNTY MOUNTAINS AND DESERTS ARE EXPECTED TO EXCEED 45  
MPH THIS AFTERNOON AND THIS EVENING BEFORE DECREASING OVERNIGHT SO  
A WIND ADVISORY CONTINUES FOR THESE AREAS THROUGH 500 AM FRIDAY.  
 
MEANWHILE, DRIER AIR PUSHING INTO OUR AREA WILL ALLOW FOR THE  
UPSLOPE LOW CLOUDS TO SLOWLY ERODE THIS EVENING AND SKIES WILL BE  
MAINLY CLEAR ACROSS OUR AREA ON FRIDAY AS THE OFFSHORE RIDGE  
BECOMES MORE AMPLIFIED AND PUSHES THE STREAM OF SHORTWAVE IMPULSES  
FURTHER NORTHWARD. BREEZY CONDITIONS WILL STILL PREVAIL ACROSS  
PORTIONS OF OUR AREA ON FRIDAY AS SURFACE P-GRADS REMAIN FAIRLY  
STRONG, MOST NOTICEABLY IN THE SAN JOAQUIN VALLEY; BUT ARE  
EXPECTED TO REMAIN BELOW ADVISORY LEVELS. TEMPERATURES WILL REMAIN  
ON THE COOL SIDE FOR LATE APRIL.  
 
THE 18Z WRF IS INDICATING THE RIDGE WILL SLOWLY SHIFT EAST OVER  
THE WEEKEND WHICH WILL BRING RISES IN HEIGHTS AND THICKNESSES  
ALONG WITH RELAXING P-GRADS. TEMPERATURES WILL RISE TO NEAR  
SEASONAL NORMALS BY SATURDAY AND TO ABOVE NORMAL BY SUNDAY AS A  
RESULT. WINDS WILL DIMINISH ON SATRUDAY AND REMAIN FAIRLY LIGHT  
FOR THE REMAINDER OF THE WEEKEND.  
 
THE MEDIUM RANGE MODELS ARE IN FAIRLY GOOD AGREEMENT IN BUILDING  
THE UPPER RIDGE INLAND ACROSS THE WESTERN CONUS MONDAY THROUGH  
THURSDAY WHICH WILL PROVIDE FOR A PERIOD OF DRY CONDITIONS AND  
ABOVE NORMAL TEMPERATURES ACROSS OUR AREA.  
 

 
   
AVIATION
 
LOCAL MVFR AND ISOLATED MOUNTAIN OBSCURING IFR IN LOW  
CLOUDS IN THE SOUTHERN SIERRA NEVADA UNTIL 06Z FRIDAY AND IN THE  
KERN COUNTY MOUNTAINS UNTIL 18Z FRIDAY. OTHERWISE, VFR CONDITIONS  
WILL PREVAIL ACROSS THE CENTRAL CA INTERIOR ALONG WITH GUSTY TO  
BREEZY NORTHERLY WINDS DURING THE NEXT 24 HOURS.  
 

 
   
AIR QUALITY ISSUES
 
NONE.  
 

 
   
CERTAINTY
 
 
THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS HIGH.  
THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS MEDIUM.  
 
CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT  
WWW.WEATHER.GOV/HNX/CERTAINTY.PHP FOR ADDITIONAL INFORMATION  
AN/OR TO PROVIDE FEEDBACK.  
 

 
   
HNX WATCHES/WARNINGS/ADVISORIES
 
 
WIND ADVISORY UNTIL 5 AM PDT FRIDAY CAZ095-098-099.  
 

 
 

 
 
PUBLIC...DS  
AVN/FW...ANDERSEN  
SYNOPSIS...DS  
 
WEATHER.GOV/HANFORD  
 
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