Category: Forecast

September 10, 2023 Summary   Mainly mid and  high level moisture from tropical storm Jova continues to be entrained in a southwesterly flow aloft above the southern half of California. Embedded within this flow are pockets of convection which have set off sprinkles and even isolated showers and thunderstorms. As expected, rainfall amounts have been rather…

September 9, 2023 Summary  There was somewhat of a surprise during the early morning hours as the first outer band from tropical storm Jova became caught up in the southwesterly flow above central California, resulting in variable cloudiness with even a few isolated feeble thunderstorms crossing the valley. To my knowledge, just trace amounts of…

September 8, 2023 Summary  A zone of high pressure stretches from the Desert Southwest westward over California while a trough of low pressure centers over the Gulf of Alaska to a trough well west of California. The winds aloft are currently out of the southwest. To our southeast, monsoonal moisture is a main feature with…

September 7, 2023 John has a medical appointment this morning. Reports will resume tomorrow morning. We appreciate your patience.  Trudy   Forecast Mostly clear skies through Monday. Mostly clear with occasional high clouds Monday night through  Thursday.     Two Week Outlook:  September 12  through September 18: This model indicates high pressure will be parked…

September 6, 2023 Summary  A trough of low pressure along the west coast is just weak enough to maintain marginally below average temperatures through Thursday. Upper level high pressure centered over New Mexico will expand northward and westward as we head into the weekend, allowing readings in the mid to upper 90s through the middle…

September 5, 2023 Summary  The trough of low pressure which resulted in a beautiful weekend has moved into the Great Basin. This will allow temperatures to rise from the mid 80s yesterday to near 90 at most locations today and Tuesday. Upper level high pressure which was suppressed southward into northern Mexico will build slowly…

September 2, 2023 Summary  A low pressure system is centered just to the northwest of San Francisco this morning. A much cooler air mass has moved in aloft. Freezing levels at this time yesterday were at about 14,000. This morning it’s at 11,000 feet. The marine layer along the coast has deepened to more than…

September 1, 2023 Summary  We will start off September significantly cooler as a trough of low pressure digs southward from the Pacific Northwest into northern and central California. Water vapor satellite imagery indicates the leading edge of the trough has reached as far south as Fresno County and will engulf the rest of central California…

August 31, 2023 Summary  The first signs of a major cooling trend are already evident. The marine layer,, which yesterday stood at only 800 feet has deepened to 1,900 feet this morning. Modified marine air will surge down the valley this afternoon and evening. Temperatures this afternoon will probably drop about 5 to 6 degrees…

August 30, 2023 Summary  Today and Friday will be hot, however, the weekend into early next week will be perfect as temperatures will plummet from near 100 today and Thursday into the upper 80s Friday and low  to mid 80s Saturday and Sunday. A relatively small upper high is centered over Arizona this morning. Weaker…