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San Joaquin Valley, CA
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Area Forecast Discussion
FXUS66 KHNX 241124 
  AFDHNX 
   
  Area Forecast Discussion 
  National Weather Service Hanford CA 
  424 AM PDT Sat Apr 24 2021 
   
   
  .SYNOPSIS... 
  A storm system will bring rain and mountain snow to the region  
  from late tonight into Monday morning along with unseasonably  
  cool high temperatures Sunday and Monday. Dry weather and a day to 
  day warming trend will occur Tuesday through the end of next  
  week. High temperatures of ninety degrees or warmer are likely in  
  the San Joaquin Valley, lower foothills and the Kern County desert 
  by Thursday.  
   
  && 
   
  .DISCUSSION... 
  Shortwave energy pushing into northern California ahead of a 
  northeast Pacific low pressure system is spreading mid and high 
  cloudiness across our region while radar indicates some light 
  precip/virga brushing by our northern sections. Temperatures are 
  running up a couple of degrees over much of our area beneath the 
  increased cloud cover. Tightening onshore surface pressure  
  gradients associated with the incoming trough are producing  
  increasing southwest to west gusty winds across the mountains and 
  desert areas of Kern County.  
   
  The shortwave trough will continue to push inland today while the 
  northeast Pacific low pressure system swings southeastward toward 
  the coast. Onshore pressure gradients will continue to strengthen 
  and gusty winds will further increase, so a Wind Advisory is in  
  effect for the Kern County desert areas beginning at noon today. 
   
  Model solutions are consistent with the incoming low pressure 
  system, bringing it ashore by early Sunday morning and swinging it 
  inland through Monday. Showers are expected to spread southward 
  into central California overnight and affect all of our area by 
  Sunday. There is little change in forecast precipitation amounts, 
  with Valley locations expected to receive around 1/10 to 1/4 of an 
  inch, lighter on the west side. Amounts will increase in higher 
  elevations of the Sierra, with up to 3/4 of an inch in the 
  foothills and around 1 inch at higher elevations. Snow levels will 
  run around 6000 ft and we can expect 6-12 inches of snowfall 
  accumulating north of Kings Canyon, up to 18 inches at the highest 
  elevations. A Winter Storm Warning is therefore in effect for this 
  area 2 AM Sunday to 11 AM Monday. Snow fall amounts farther south 
  in Tulare County will be lesser, with around 3-7 inches expected, 
  and A Winter Weather Advisory is in effect there 5 AM Sunday to 11 
  AM Monday. 
   
  The passing system will maintain the gusty wind pattern and the 
  Wind Advisory for the Kern County desert will remain in effect 
  through 6 PM Sunday. Precipitation will taper off, with just some 
  lingering Sierra showers by Monday evening. Temperatures will also 
  trend downward through the weekend, a couple of degrees below 
  normal today then likely to reach around 15-20 degrees below 
  normal on Sunday. Dry and warming conditions will follow the 
  exiting system for early next week, with temperatures up to 4-8 
  degrees above normal by Wednesday. 
   
  As high pressure strengthens over our area, temperatures will 
  continue to warm into the end of the week. By Friday there is 
  around a 65 percent probability of high temperatures into the 
  lower 90s across the San Joaquin Valley, lower foothills and 
  desert areas. 
   
  && 
   
   
  .AVIATION... 
  Wind gusts in excess of 35 knots are possible below the Kern county 
  mountain passes after 19z Saturday. Showers spreading southward 
  over the region after 06Z Sunday will bring areas of MVFR with  
  local IFR and mountain obscurations as far south as Fresno County 
  by 12Z Sunday. Otherwise, VFR conditions can be expected over the 
  central California Interior 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.html for additional information 
  an/or to provide feedback. 
   
  && 
   
  .HNX WATCHES/WARNINGS/ADVISORIES... 
  Winter Storm Warning from 2 AM Sunday to 11 AM PDT Monday for  
  CAZ192-193. 
   
  Winter Weather Advisory from 5 AM Sunday to 11 AM PDT Monday for  
  CAZ194. 
   
  Wind Advisory from noon today to 6 PM PDT Sunday for CAZ198-199. 
   
  && 
   
  
 
 public...JEB
 aviation....JEB
 
 weather.gov/hanford