Author: Trudy Hibler

September 29, 2017 Summary:  Already this morning there are subtle signs of an overall change in our weather pattern, minor as it may be.  Yesterday at this time, the marine layer was only 200 feet deep and here we are 24 hours later with a marine layer of 1,500 feet and rising.  This is all…

September 28, 2017 Summary:  The center of the upper low this morning has moved north/northeast and is now centered over Utah.  The counterclockwise circulation around the low is maintaining a northerly flow over California.  At the surface, a weak off shore flow is still prevalent.  In fact, the marine layer this morning at Monterey was…

September 27, 2017 Summary:  At the surface, an upper low has developed over extreme western Arizona and has the winds at  the surface off shore.  This will create an east to northeast flow over central California.  In the meantime, upper level high pressure has nosed into the Pacific Northwest and is also creating a northeast…

September 26, 2017 Summary:  The low pressure system that resulted in mild conditions of late has now moved into the northern plains states.  Meanwhile, upper level high pressure is slowly building into the Pacific Northwest and  northern California.  This keeps the northerly flow above central California going.  Latest soundings above the valley have winds out…

September 25, 2017 Summary:  Temperatures at most locations will move into the mid 80s this afternoon and near 90 at many locations Tuesday.  Currently, we have a northerly flow aloft rotating around an upper level high off the Pacific coast.  At the surface, an off shore flow is developing which will create Santa Ana wind…

September 23, 2017 Summary:  Temperatures are generally 3 to 5 degrees milder this morning then they were yesterday pre-dawn.  However, many ag stations are down into the 40s once again, which is very chilly for this early in the season.  The upper low is centered over Nevada and Idaho and has  not moved much over…

September 22, 2017 Summary:  It was quite chilly last night.  Lows in most locations fell well down into the 40s.  the coldest I could find was 43 degrees at both Lindcove and Strathmore.  It’s a surprise to no one that these readings are 4 to 6 weeks ahead of schedule.  Expect similar conditions tonight.  …

September 21, 2017 Summary:  For this early in the year, a well defined cold front is moving down the valley.  Light rain has occurred along the east side from Merced County all the way along the foothills of Tulare County.  The front will soon sweep through Kern County with dry weather quickly returning.  A strong…

September 20, 2017 Summary:  Temperatures are anywhere from 2 to 8 degrees cooler this morning as compared to 24 hours ago.  Most locations are in the 50s this morning with Kern County being in the upper 50s to the low 60s.  We remain under a very large trough of low pressure which is centered over…

September 19, 2017 Summary:  The cloud shield from a big trough of low pressure which is now centered over Idaho and western Montana has spread as far south as Merced.  There are also some upslope clouds developing over the south valley along the north facing slopes of the Tehachapi Mountains and along the Diablo Range. …