July 1, 2019 Summary: Whenever you see a persistent trough of low pressure over and off the coast of the Pacific Northwest, you can bet our temperatures will be moderate for the time of year. And, it appears low to mid 90s will be a good bet through Friday which is marginally below average for…
Category: Forecast
June 29, 2019/report
June 29, 2019 Summary: The main feature of note this morning is rapidly weakening tropical storm Alvin which is literally unwinding. Mid and high level moisture from Alvin is now caught up in the southwesterly flow aloft and is transporting abundant cloud cover into southern California and Arizona. Interestingly, models show the northern edge of…
June 28, 2019/report
June 28, 2019 Summary: Most ag stations this morning are reporting low to mid 50s as of 6:00am. Sanger was the coolest at 51 degrees, which is an unusually refreshing start, considering this is the end of June. The big trough of low pressure over the Pacific Northwest will begin to weaken today, allowing temperatures…
June 27, 2019/report
June 27, 2019 Summary: The center of circulation of a fairly substantial low pressure system is located near Portland, Oregon this morning with a big trough extending into northern and central California. The flow aloft over central California is out of the southwest and contains little moisture, although there are some high, thin clouds off…
Out of office notice
June 25, 2019 With stable conditions, we will be out of the office until June 27. Reports will resume at that time. John and Trudy
June 22, 2019/report
June 22, 2019 Summary: The trough of low pressure which resulted in a strong push of modified marine air into the valley has now moved into the Rocky Mountain region. Winds at Traverse Air Force Base in the Delta are southwest at just 6 MPH, meaning the flow of cooler air into the valley is…
June 19, 2019/report
June 18, 2019 Summary: Upper level high pressure is centered this morning several hundred miles off the northern California coast with a ridge extending inland through northern and central California. The freezing level over Oakland this morning was 15,300 feet, which is a couple thousand feet higher than the freezing level over Vandenberg or even…
June 18, 2019/report
June 18, 2019 Summary: A benign upper level low is located just west of Los Angeles this morning. High pressure in the upper atmosphere is centered several hundred miles off the northern California coast with a ridge extending inland through Oregon and northern California. The combination of these two features has the winds aloft out…
June 17, 2019/report
June 17, 2019 Summary: Other than some high clouds left over from thunderstorms over the Sierra Nevada yesterday afternoon, skies are generally clear. In the upper atmosphere, a benign upper low is centered over the southern Sierra Nevada and will drift to a position off the southern California coast Tuesday. The impact on the valley…
June 15, 2019/report
June 15, 2019 Summary: The marine layer at Monterey still stands at 2,100 feet. However, there is not enough of an on shore flow for a legitimate push of modified sea breeze down the valley. Some of the sea breeze could make it as far south as Merced County via the Delta, but the central…