Category: Forecast

July 29, 2020 Summary:  Strong high pressure at the upper levels of the atmosphere is parked right over southern California this morning.  the high also extends eastward into the Desert Southwest and off shore southern California.  Central California is on the far northwest flank of the high, resulting in triple digit temperatures through at least…

July 28, 2020 Summary:  Typical valley heat will be with us for at least the next week.  We may see minimal moderation in parts of Merced County due to a minor leakage of modified marine air moving through Pacheco Pass.  As of 6:00am, Pacheco Pass was reporting winds out of the southwest at 13 MPH…

July 27, 2020 Summary:  The main center of upper level high pressure has now migrated a bit further west.  It’s now parked over the Four Corners region of the Desert Southwest.  A weak trough of low pressure is over Nevada and extends into eastern Oregon.  The air above the valley floor is typically warm for…

July 25, 2020 Summary:  Changes over the next week or so will be subtle.  Short term, a slow warming trend will continue through Tuesday with readings generally leveling off in the lower 100s which is marginally above average for this time of year.  The marine layer this morning stands at 1,900 feet.  There is a…

July 23, 2020 Summary:  The current weather pattern is about as quiet as it ever gets.  The features governing our current weather are very weak. There is a very weak trough of low pressure which will actually slide off shore over the weekend.  The shallow intrusion of marine air that lowered temperatures intro the low…

July 23, 2020 Summary:  Essentially, a very weak upper low is located over Merced County this morning.  there is no cloud cover associated with this feature.  However, it should add enough lift to the atmosphere for the development of isolated thunderstorms over the southern Sierra Nevada from roughly Kings Canyon northward.  Minor lowering of  pressures…

July 22, 2020 Summary:  Expect marginally cooler weather today and Thursday.  This is due to a benign upper low centered just to the southwest of the Golden Gate this  morning.  already, the marine layer along the coast has deepened from near 1,800 feet yesterday to just under 3,000 feet this morning.  the combination of the…

July 21, 2020 Summary:  There are two benign features this morning in the upper atmosphere.  The first is a weak upper low over southern Nevada, while the second is another upper low off the northwest California coast.  The flow aloft is out of the west/southwest, however there is a line of demarcation along the summit…

July 20, 2020 Summary:  As is typical, this will be a very quiet weather week in central California.  The various players are generally slow and weak.  Currently, weak upper level high pressure over the Desert Southwest is the most dominant feature, however there is a weak upper low off the northern California coast.   The…

July 18, 2020 Summary:  The marine layer continues to hover at around 1,800 feet along the central coast.  The winds this morning in the Delta are fairly light out of the southwest at 11 MPH.  Upper level high pressure essentially covers the southern tier of states from the southeast U.S. across the country into southern…