Author: Trudy Hibler

December 5, 2017 Summary: A relatively cold air mass is now at the lowest level of the atmosphere.  In other words, it’s trapped under a strong bubble of high pressure and its descending air.  A warm air inversion will be setting up as the week wears on, so this air mass will have no place…

December 5, 2017 Summary: Strong upper level high pressure is centered just off the coast of the Pacific Northwest and continues to build a ridge into western Canada.  At the surface, high pressure is centered over northern Nevada and Utah, creating a strong easterly flow across central and southern California.  There were some strong, gusty…

December 4, 2017 Summary: There are two high centers which are having a direct impact on our weather.  The first is a building high over the Pacific Northwest.  It extends southward into southern California and will cause a ridge to be built northward into western Canada over the next 48 hours.  In the meantime, surface…

December 4, 2017 Summary: A stubborn patch of cloud cover remained over much of Tulare County and southern Fresno County overnight.  The base of the overcast has risen to 5,000 feet.  Once it gets that high, typically the clouds begin to evaporate and that’s what I’m anticipating.  Some locations dropped below freezing last night.  the…

December 3, 2017 Summary: There is a great deal of upslope clouds banking up against the southern Sierra Nevada and the  Kern County mountains this afternoon.  As of the time of this report, it was generally overcast from Visalia southward with clear skies from that point north.  Porterville was reporting an overcast of 5,000 feet…

December 3, 2017 Summary: A cold low pressure system is located over northeast California and is moving rapidly eastward.  The associated cold front moved through the valley during the predawn hours and is already moving into southern California.  Clearing is taking place down to about Merced as drier air surges in from the north.  Some…

December 2, 2017 Summary: You can certainly tell where the pool of cold air is this afternoon.  The freezing level over Medford, Oregon has plummeted to 2,600 feet while in our neck of the woods, VAFB reported a freezing level of 12,600 feet.  The center of the cold low is now just west of Portland,…

December 2, 2017 Summary: Areas of dense fog have again developed from north of Delano to north of Merced.  Most of it is concentrated in eastern Kings County, western Tulare County, and parts of Fresno County.  High, thin clouds are also spreading into central California ahead of a cold low which is now centered off…

December 1, 2017 Summary: Yet another carbon copy afternoon as temperatures wind up in the low to mid 60s.  Dew points are slightly higher and range mostly in the mid 40s.  there are some high, thin clouds moving over the valley and they will continue to do so tonight, but my feeling is they will…

December 1, 2017 Summary: Yet another finger of fog stretches up the center of the valley from roughly Delano to Merced.  Outside of the foggy areas, skies are again generally clear with overnight lows once again well down into the 30s.  the overall weather picture indicates upper level high pressure remains temporarily over the eastern…