Author: John Hibler

  February 10, 2021 Summary: Generally clear skies prevail this afternoon.  There are some low clouds along the Sierra Nevada foothills.  Temperatures are generally in the mid 60s as of 1:00pm.  We are currently under a fast moving wedge of high pressure which will keep skies mostly clear through early Thursday morning.  clouds will begin…

February 10, 2021 A weak wedge of upper level high pressure is filling in behind yesterday’s weak trough passage.  There is still quite a bit of cloudiness over the Sierra Nevada and along portions of the east side of the San Joaquin Valley, however, mostly clear skies will prevail today and tonight.  the weak ridge…

February 9, 2021 Summary: A weak trough of low pressure is currently moving through central California.  Doppler radar is depicting a few isolated showers over the Coast Range off of San Francisco, but mainly just sprinkles is all that can be anticipated here from this system.  A northwest push of air will move down the…

February 9, 2021 A weak trough of low pressure and its associated cold front will move through central California this afternoon.  Already, Doppler radar is depicting virga, or rain falling but not reaching the ground.  I wouldn’t be surprised to see a few sprinkles however before the day is over.  Cooler air will overspread our…

February 8, 2021 Summary: Higher level clouds based between 15,000 and 20,000 feet are streaming over central California ahead of a weak low pressure system which will move through Tuesday and Tuesday night.  Already the air aloft has cooled somewhat.  The freezing level above Oakland taken earlier today was 11,200 feet, which is still fairly…

  February 8, 2021 In the broad picture, the high pressure system over the eastern Pacific off the coast of the Pacific Northwest and northern California is beginning to break down.  A broad area of arctic low pressure is centered just north of Lake Superior and extends from eastern Washington on the west to New…

February 7, 2021 A strong bubble of high pressure covers the eastern Pacific Ocean with a ridge extending into Alaska.  Bitterly cold arctic air continues to dive southward through the Midwestern US.  As of the time of this writing, one location east of Chicago was reporting 16 degrees below 0.  Compare that to the mid…

  February 5, 2021 Summary: A relatively strong upper high is centered roughly 500 miles to the west of the southern California coast this afternoon with a huge ridge reaching north into Alaska.  The first of several arctic outbreaks is currently sweeping through the northern Rockies and Midwestern US.  The high, which now covers the…

We will be out of the office the morning of Saturday, February 6 getting a COVID-19 vaccination.  Reports will return Saturday afternoon.     February 5, 2021 Summary: Temperatures on the valley floor are running anywhere from 5 to 10 degrees higher than 24 hours ago.  Abundant sunshine has most readings in the upper 50s…

February 5, 2021 Considerable warming is taking place above the valley floor.  Sandberg at an elevation of 4,100 feet is 8 degrees warmer than 24 hours ago while Blue Canyon at 5,800 feet is a full 16 degrees warmer than yesterday at this time.  The freezing level taken over Vandenberg AFB a short time ago…