Author: Trudy Hibler

April 25, 2024 Summary  The trough of low pressure responsible for the major cool down of the past 24 hours has moved southeastward into Arizona. Following closely on its heels is a second low which is currently moving into northern California and will move into central California late this afternoon through Friday. Scattered showers and…

April 24, 2024 Summary  A weak upper low off the south central California coast will move eastward across the southern half of California today and tonight. This system will add enough convection to the  atmosphere for a chance of isolated thunderstorms over the Sierra Nevada this afternoon and evening. Otherwise, just partly cloudy skies and…

April 22, 2024 Summary  There is all kinds of evidence this morning that a major cool down is underway. The depth of the marine layer has shot up to over 4,000 feet, which is roughly 3,000 feet deeper than 24 hours ago. Marine air is gushing through the Delta. Winds at TAFB are gusting to…

April 22, 2024 Summary  today will be the warmest day of the spring season, so far. Relatively strong  upper level high pressure extends from  Baja northward across California and into the Pacific Northwest. The latest surface observation indicated the barometric pressure at San Francisco and Las Vegas were identical, meaning there is no chance of…

April 20, 2024 Summary  A ridge of upper level high pressure stretches from the Pacific Northwest to southern California while a very weak trough of low pressure is moving through the Desert Southwest. The high will maintain its strength through Sunday then will begin to amplify Monday and Tuesday, leading to our first 90 degree…

April 19, 2024 Summary  Overall, a weak blanket of high pressure covers the eastern Pacific Ocean and the western US. The lone exception is a very weak trough of low pressure which will move through central California this afternoon and tonight. The marine layer has deepened considerably in response to this feature. In fact, the…

April 18, 2024 Summary  A zone of upper level high pressure covers most of the eastern Pacific Ocean and California. This will allow temperatures to warm into the mid  80s through Saturday. The marine layer along the coast stands at 1,100 feet which is roughly 600 feet deeper than 24 hours ago but is not…

April 17, 2024 Summary  We’re late enough in the spring season now where later spring and summer tools can be added. For example, one of the elements I frequently use during the dry season  is the depth of the marine layer and we find the marine layer  is only 600 feet  deep this morning. This…

April 16, 2024 Summary  We are now entering into a prolonged period of dry, stable weather.  It looks like we’ve finally broken the spine of a long, active wet season. Fresno has recorded 9.64 inches of rain so far this season, which is 98% of average.  Bakersfield has tallied 10.73 inches of rain which is…

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