Kevin_Martin's Blog

A high pressure system will be centered to the West of the California area.  Way out in the ocean it will sit.  We will be on the Eastern side of this high.  The Eastern side is known as the subsidence side, or sinking air.  This will be a very , very bad pollution tie for the Southern California as a strong inversion will be present.  You will not see the mountains from areas, and if you are in the mountains, you will not see the Valleys below.  It will be terrible. 
As for temperatures.  You heard it right, this subsidence, or sinking air side of the high will give high temperatures across much of the Southland.  OWS progs indicate an increase of 20-30 degrees in spots.  This is going to be very bad.  Areas in Palm Springs will be the hottest on Thursday with an OUCH temperature profile of near 110 degrees or higher in spots.  You better believe you need to drink plenty of water out there, and cover your skin from the sun.  Bakersfield over 100 degrees as well.  OWS Heat Warnings will go out with this heatwave.  These warnings are so you can warn your family/friends/ anyone in the mentioned areas.  Anyone outside, DRINK WATER.  Do not let yourself get a heatstroke or worse.  I can't stress it anymore than that.
Los Angeles areas should break in near 80 or so.  This is because of the marine layer.  The marine layer should moderate the temperatures to a cooler level than the Inland Empire areas, which should get at or just over 90.
The Central California area will be hot as well, with areas there along the I-5 between Baksersfield and San Francisco getting over 100 degrees.  A tough time for some it will be, but get through it safe!

Kevin Martin
Ontario Weather Service
Meteorologist In Charge