Category: Forecast

September 16, 2022 We remain under a westerly flow aloft which is allowing a rather robust on shore flow to continue, resulting in very comfortable weather. Off the coast of the Pacific northwest is a low pressure system which will drop southward and center off the coast of San Francisco by Sunday evening. Rain will…

September 16, 2022 In the short term, the very pleasant weather of the past few days will continue through Sunday. A westerly flow prevails in the upper atmosphere and is resulting in much cooler air aloft. At the surface, marine air moves through the Delta from time to time, adding to those temperatures that are…

We will be out of the office Friday morning, September 16.   September 15, 2022 We just went through a rain episode from the south. We’re now looking towards a new episode from the north which will arrive late next weekend and later next week. in the short term, we have a zonal flow in…

September 14, 2022 In the short term, we will enjoy a stretch of gorgeous weather as a westerly flow has broken in from the eastern Pacific creating an on shore flow both at the surface and aloft. For the first time in roughly three months, temperatures will not reach the 90 degree mark. In fact,…

September 13, 2022 There are still some scrappy mid level clouds over portions of the valley, mostly based between 10,000 and 15,000 feet. Even so, they’re on their way out as a dry westerly wind flow begins in the upper atmosphere, so pushing the remains of Kay into the Great Basin. A trough of low…

September 12, 2022 Yesterday, I had a grower report .30 at McFarland. Arvin reported .07 while most other locations were dry. I’m not quite ready to take the minimal chance of scattered light showers and isolated thunderstorms out of the forecast for one more day as there are several areas of moisture to deal with.…

First of all, my many thanks for the rainfall reports throughout the valley. Most were from trace amounts to as much as .33 at Famoso, .02 to .06 at Jasmine, and .10 at one location in Visalia. Most of my regularly monitored stations picked up trace amounts to less than .05. Yesterday we saw a…

September 10, 2022 Once hurricane Kay is now no more than a remnant low located about 250 miles to the west/southwest of San Diego. The difference in pressure between high pressure over the Great Basin and the remnant low has spawned some gusty winds over the Kern County mountains. These winds have been forced downslope…

September 10, 2022 The center of Kay’s circulation is located roughly 200 miles to the west/southwest of San Diego. The rich tropical moisture currently unwinding from this rapidly dissipating storm is now as far north as the south valley. So far, just sprinkles have been recorded. The northern limit of light showers showing up on…

September 9, 2022 The northern edge of the cloud canopy from rapidly weakening tropical storm Kay was as far north as Kings and Tulare Counties. Rain had advanced as far north as Orange County along the coast and Riverside County inland. Flash flood warnings have been hoisted for portions of the Imperial Valley where one…