Projected high temperature for Mariposa on Saturday: 95 degrees
Projected high temperature for Oakhurst on Saturday: 99 degrees
Projected high temperature for Yosemite Valley on Saturday: 88 degrees

July 12, 2019 - The National Weather Service Hanford Office reports high temperatures Saturday afternoon in the San Joaquin Valley will be near 105 degrees.

Most people have experience with this kind of heat and will instinctively know how to avoid heat-related problems.

Although heat events like this are relatively common, heat-related impacts are possible Saturday for those new to the area if simple precautions are not taken.

Plan to take action to reduce time outdoors, drink plenty of water, and remain in air-conditioned buildings.

Heat-sensitive groups, such as the elderly, young children, and those with chronic ailments may need assistance to avoid heat-related illness.

As always, never, ever leave a child or pet in an enclosed automobile.

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  Area Forecast Discussion 
  National Weather Service Hanford CA 
  258 AM PDT Fri Jul 12 2019 
   
  .SYNOPSIS... 
  An upper-level area of high pressure over the Four Corners will  
  be responsible for hot weather this weekend. The hottest day  
  should be Saturday as high temperatures will be six to nine  
  degrees above normal for this time of year. Temperatures will  
  decrease to seasonal values early next week. A few thunderstorms  
  may develop over the Sierra Nevada crest this afternoon.  
   
  &&  
   
  .DISCUSSION... 
  An upper-level area of high pressure will be centered near the 
  Four Corners today through Sunday. Infrared satellite imagery 
  depicts monsoonal moisture progressing northward along the  
  western periphery of this anticyclone over San Bernardino County.  
  It is not out of the question that some of this moisture may make  
  it into the Southern Sierra Nevada, resulting in a few  
  thunderstorms developing along the crest this afternoon.  
   
  The aforementioned area of high pressure aloft will be responsible 
  for hot weather this weekend. High temperatures this afternoon and 
  Sunday afternoon should be around five degrees above normal for 
  this time of year. The hottest day should be Saturday, with 
  maximum temperatures near 105 degrees in the San Joaquin Valley. 
  Although this type of heat is relatively common, heat-related 
  impacts are possible Saturday for those new to Central California 
  and heat-sensitive groups, such as the elderly, young children, 
  and those with chronic ailments. Reduce time outdoors, drink 
  plenty of water, and remain in air-conditioned buildings Saturday.  
   
  An upper-level trough of low pressure will approach the Pacific 
  Northwest Sunday night, before moving to the northeast into 
  Western Canada Monday. As a result, temperatures Monday will 
  return to seasonal values. A stronger trough of low pressure  
  aloft will approach the coast of the Golden State Monday night.  
  This upper-level trough of low pressure will remain over  
  California Tuesday through Wednesday, prior to weakening Wednesday 
  night. Zonal flow aloft is expected Thursday. Temperatures Tuesday 
  through Thursday could be a couple of degrees below normal for 
  this time of year. 

Source: NWS