Author: Trudy Hibler

November 30, 2017 Summary: In the short term, central California remains between essentially two jet streams.  The first is moving into Oregon while the southern branch is moving southwest to northeast into northern Baja and southern California.  This leaves central California relatively cloud free, although some high clouds may begin to show up over the…

November 30, 2017 Summary: There is a fairly narrow ribbon of fog stretching up the center of the valley from roughly just north of Delano to Merced.  The latest observations indicated the visibility at Visalia was ¾ of a mile, ½ mile at Hanford, and ¼ of a mile at Merced.  Elsewhere, the visibility was…

November 29, 2017 Summary: The high clouds that were over the south valley this morning have moved into southern California, revealing mostly clear skies over the entire valley this afternoon.  Temperatures are again warming into the lower 60s with dew points in the low to mid 40s.  So, very little has changed over the past…

November 29, 2017 Summary: Temperatures are running 2 to 3 degrees warmer at most locations than they were 24 hours ago.  This is due to a very weak trough passage which is being accompanied by high clouds, but little else.  Behind this little trough, upper level high pressure will again fill in from the west. …

November 28, 2017 Summary: Temperatures this afternoon are moving into the lower 60s.  Dew points are in the low to mid 40s so with mostly clear skies, temperatures again tonight will dip into the 30s.  Upper  level high pressure is centered just off the California coast and extends inland into the interior west with a…

Summary:  Widespread mid to upper 30s are prevalent throughout the citrus belt this morning with colder locations down to near 30.  No doubt there’s a low lying spot or two out there that chilled into the upper 20s.  skies were generally clear last night, allowing good radiational cooling and with dew points low enough, fog…

Summary: Temperatures this afternoon are running anywhere from 17 to 21 degrees cooler than yesterday at this time.  The freezing level over Oakland earlier this morning had dropped down to 4,800 feet, which is by far the lowest we’ve seen so far this season.  At the same time, the freezing level over Vandenberg Air Force…

November 27, 2017 Summary:  A rapidly moving cold front is moving through the extreme eastern and southern portions of the San Joaquin Valley and into the Sierra Nevada at this hour.  Rainfall amounts so far have been quite light with most locations recording less than a tenth of an inch.  The heaviest amount I could…

November 26, 2017 Summary:  Rain has spread over northern California as far south as Santa Cruz along the coast and Modesto inland.  The main low center is off the northern California coast and will move inland tonight, driving a cold front through central California and spreading precipitation over the area.  The jet stream is flanked…

November 25, 2017 Summary: Temperatures this afternoon are again approaching record levels.  Many locations are already in the low to mid 70s, meaning a few locations in Kern County may top the 80 degree mark this afternoon.  A very warm air mass is already in place.  Now we have a weak southerly flow developing along…