Author: John Hibler

February 16, 2021 The center of circulation of upper level high pressure is well off the California coast with a big trough extending from the Gulf of Alaska southeastward to the Pacific Northwest and finally into the interior western U.S.  Fast moving disturbances continue to race southeastward into Nevada, Utah, with the Sierra Nevada being…

February 15, 2021 Summary: The weather system which spread showers down the Sierra Nevada yesterday and last night has weakened and is now in the Desert Southwest.  The next weather system is also an inside slider and will move through the Pacific Northwest tonight then into the Great Basin Tuesday.  This system is somewhat colder…

February 15, 2021 The next weather system is racing southeastward to the Great Basin and is spreading light showers down the Sierra Nevada.  We will be on the far western side of this trough so I wouldn’t completely rule out a chance of light showers later today, especially along the Sierra Nevada foothills.  We can…

February 14, 2021 Upper level high pressure is now anchored well off the California coast.  Cold, weak weather disturbances continue to move rapidly out of the Gulf of Alaska through the Pacific Northwest then into the interior west just to the east of the Sierra Nevada.   The next system will spread some light showers…

February 13, 2021 Summary: A few light showers raced down the eastern side of the San Joaquin Valley this afternoon, leaving mainly trace amounts to a few hundredths.  This activity will end in a few hours.  Upslope clouds will keep generating tonight and for a good part of the day Sunday as a robust northwesterly…

February 13, 2021 A cold trough of low pressure has now stretched from Washington to Nevada.  Light rain and snow is spreading down the Sierra Nevada and has now reached into Tulare County.  The main dynamics and energy with this storm will pounce on Nevada and Utah and then will form a major winter storm…

February 12, 2021 Summary: Satellite imagery this afternoon depicts plenty of upslope clouds over the eastern and southern San Joaquin Valley.  The base of the overcast over Bakersfield is 4,500 feet while at Porterville and Visalia, the base is 4,100 feet.  Mostly clear to partly cloudy conditions prevail elsewhere.  The northwesterly winds have decreased somewhat,…

February 12, 2021 A fast moving low pressure system and its associated cold front moved through the valley overnight and is already centered over southeast California.  A strong northwesterly flow both at the surface and aloft will generate some somewhat breezy winds through this evening.  In fact, there is already a substantial difference in pressure…

February 11, 2021 Summary:Doppler radar is picking up light showers over the northern San Joaquin Valley and lower Sacramento Valley and just off the central coast, as of 1:00pm.  A compact, fast moving weather system will drive right through central California tonight.  the cold front should move through during the early morning hours with showers…

  February 11, 2021 Meteorologically speaking, it has been interesting to  watch the behavior of a long episode arctic outbreak.  Some of this arctic air is now leaching into western Washington and Oregon where snow will likely fall to sea level.  Temperatures in some areas of Montana this morning range from -20 to -30.  California…