Category: Forecast

May 13, 2021 There are subtle changes occurring in the overall weather pattern.  They will not be noticeable today or even Friday.  However, the strong upper high is beginning to weaken slightly.  A thermal trough of low pressure currently stretches from central California to the Colorado River Valley.  This has allowed the marine layer to…

May 12, 2021 Strong upper level high pressure is centered just off the California coast this  morning.  surface pressure remains essentially flat with both San Francisco and Las Vegas reporting identical altimeter readings of 29.94.  Midsummer conditions will prevail through Thursday as the hottest locations on the valley floor will be nudging the century mark. …

May 11, 2021 At the upper levels of the atmosphere, high pressure continues to build in from the west.  At the surface, pressures are virtually flat.  At last report, San Francisco and Las Vegas were reporting an altimeter reading of 29.88.  the marine layer is also fairly stable with a depth of about 1,200 feet…

May 10, 2021 Low pressure is centered over Idaho and northern Utah this morning.  upper level high pressure over the eastern Pacific is slowly building into California.  The freezing level over Oakland earlier this morning was right at 14,000 feet, roughly 1,200 feet higher than yesterday at this time.  The marine layer along the coast,…

May 8, 2021 A trough of low pressure continues to stretch from British Columbia southward into the Desert Southwest.  Surface pressure remains much higher over Oregon and northern California than over southern Nevada.  The current altimeter reading at Medford, Oregon is 30.36 inches of mercury while at Las Vegas the reading is currently 29.74.  This…

May 7, 2021 Temperatures are anywhere from 9 to 11 degrees cooler than 24 hours ago.  The cooling has taken place at all levels of the atmosphere as temperatures at 4,000 feet are 12 degrees lower and the freezing level has dropped down to 11,100 feet over Oakland.  That’s roughly 2,900 feet lower than 48…

May 6, 2021 The beginning stages of a cooling trend are well underway.  The marine layer at Monterey has jumped to 2,300 feet.  In the Delta, winds at Travis AFB are now out of the southwest at 23 MPH, gusting to 27 MPH.  Further south at Pacheco Pass, winds are sustained at 20 MPH.  Temperatures…

May 5, 2021 Every ten years, NOAA puts out new average temperatures for the US.  The newest averages are generally from .5 to 1 degree warmer in the San Joaquin Valley.  For you global warming fans, keep in mind that over the past ten years, we have been generally under a long term drought situation,…

May 4, 2021 Temperatures over the higher elevations are running several degrees higher than 24 hours ago.  Sandburg at an elevation of 4,100’ is 5 degrees warmer while Blue Canyon at 5,600 feet is 8 degrees warmer.  The freezing level taken above Oakland is now up to 13,700 feet while the marine layer at Monterey…

May 3, 2021 There is still enough difference in surface pressure for some locally gusty north to northwest winds along the far west side of the valley this afternoon.  Otherwise, a fairly tranquil day is on tap.  The freezing level taken above Oakland a few hours ago was 12,300 feet, which is more or less…