Author: Trudy Hibler

November 19, 2021 The fog this morning on the valley floor is rather chaotic and generally north of Kern County. A weak weather system is currently moving into northern California. Light showers have occurred as far south as Merced County, however the general flow in the upper atmosphere is out of the west so no…

November 17, 2021 The fog has finally lifted off the deck as all of the usual reporting stations are reporting visibilities between 3 and 6 miles.  Satellite imagery shows plenty of  low clouds between the Sacramento and San Joaquin Valleys.  However, the weak trough of low pressure that passed through yesterday weakened the inversion enough…

November 16, 2021 A weak long wave trough of low pressure moved through overnight.  It was not potent enough to lift the fog and low clouds out of the Sacramento and San  Joaquin Valleys, but there was enough lift for somewhat better visibility this morning.  All locations between Bakersfield and Sacramento are reporting a visibility…

November 15, 2021 Higher level clouds are obscuring satellite imagery of the fog on the valley floor. Judging from automated weather stations, and observations from various sources, the fog is very widespread and is very dense.  Several observations peg the visibility at 50 yards.  Model information on days like today are useless as they don’t…

November 13, 2021 Infrared satellite imagery of California is quite telling.  Low clouds and fog literally fill the San Joaquin and Sacramento Valleys.  The only exception is the far southern portion of the valley.  However, when we put this satellite picture into motion, it clearly shows the fog heading south just to the east of…

November 12, 2021 Fog season is in full swing now.  Every location from Visalia to sacramento is reporting a visibility of ¼ mile or less.  In Kern County and parts of Tulare County, visibility is down to a mile or two.  A strong warm air inversion has the valley sealed up.  At 6:00AM at Sandberg…

Significant warming occurred overnight over the valley floor.  For example, Sandberg at an elevation of 4,100 feet was a balmy 57 degrees at 6:00am, nine degrees warmer than yesterday at the same time.  Blue Canyon was 11 degrees warmer at 8600 feet.  The balloon soundings over Vandenberg and Oakland reflect this warming, as well. Oakland…

November 10, 2021 There is a great deal of fog and low clouds this morning due to pressures aloft rising behind yesterday’s storm system.  Most of the ground reporting stations from Visalia north are reporting a visibility of from less than .25 of a mile to .50 mile.  Above the layer of ground fog are…

November 9, 2021 From northern Fresno County up through merced County, rainfall amounts between .25 and .33 have been recorded.  The main band of energy is currently moving through Kern County with light showers.  Further north, the precipitation has largely ended, however there’s enough instability in the atmosphere to keep a chance of showers in…

November 8, 2021 That stubborn layer of low clouds in the south valley kept temperatures in the upper 50s yesterday afternoon.  Porterville  had a high of 59 with Bakersfield at 58. North of Tulare County, most locations were in the upper 60s. these clouds will mix out during the course of the day as a…