Category: Forecast

July 17, 2020   For medical reasons, we will be out of the office today, Friday July 17.  Reports will resume Saturday, July 18.    John and Trudy

July 16, 2020 Summary:  The flow of modified marine air has ceased from moving into the valley with the exception of the Delta region where a minor amount of sea breeze is sneaking through.  Further south, however, the winds at Pacheco Pass were near calm as of 6:00am.  Yesterday, the marine layer was just under…

July 15, 2020 Summary:  A weak upper low off the southern California coast is maintaining a deep marine layer.  The latest sounding at Monterey indicates the marine layer’s depth is 2,700 feet.  Winds at the Delta have gusted as high as 37 MPH during the early morning hours.  The high temperature at Los Banos yesterday…

July 14, 2020 Summary:  The depth of the marine layer has now increased to 3,000 feet and is currently surging through the Delta and other gaps and passes along the Coast Range.  Winds at Travis Air Force Base are currently sustained at 22 MPH, gusting to 36.  At Pacheco Pass, winds are currently gusting to…

July 13, 2020 Summary:  Once in a while, I get off the beaten track a bit. Yesterday was one of those days as I was watching temperature information out of Death Valley as it reached 120 degrees by noon, ending with a high of 128.  The all time high in the world was set at…

July 11, 2020 Summary:  The heat belt continues to expand towards the north and the west.  Strong upper level high pressure is centered near the New Mexico/Arizona border this morning.  the balloon sounding above San Diego continues to indicate a southeast flow.  However, the flow over central California remains out of the southwest..  the marine…

  July 10, 2020 Summary:  Strong upper level high pressure over the Desert Southwest continues to expand northward and westward from its center near the New Mexico/Arizona border. The latest balloon sounding above San Diego indicated winds aloft below 30,000 feet are now out of the south/southeast while above Oakland, a southwesterly flow continues  satellite…

July 9, 2020 Summary:  The weather pattern is slowly evolving to one which will lead us into at least a week’s worth of classic valley heat.  Upper level high pressure is currently centered over southern New Mexico and is slowly expanding northward and westward.  The freezing level earlier this morning above Oakland was just under…

  July 8, 2020 Summary:  On this day in 1905, the temperature in Fresno reached 115, which was the hottest day ever recorded.  Nothing like that today as readings will be fairly seasonal.  Triple digits are on the way, however, as upper level high pressure over northern  Mexico will begin expanding northward and westward over…

July 7, 2020 Summary:  Today will be the mildest we will see for quite some time.  A weak trough of low pressure extends from western Canada southward through the Pacific Northwest with the southern limit as far south as central California.  A very dry westerly flow continues in the upper atmosphere.  The latest sounding at…