Author: John Hibler

February 27, 2018 Summary:  The center of a cold unstable upper low is centered somewhere near the Los Angeles basin at this hour and is beginning to shift to the east rather quickly.  The northern limit of the shower activity associated with this low is over the southern Sierra Nevada of Tulare and Kern Counties…

  February 27, 2018 Summary: For the few of you who have not looked outside so far this morning, it actually rained last night with precipitation amounts ranging from a few hundredths to as much as a quarter of an inch.  Not exactly a gullywasher, but it did prove rain is possible in central California…

February 26, 2018 Summary:  The center of circulation of a relatively cold upper low is just west of the Golden Gate this afternoon.  The associated cold front continues to move steadily down the valley.  As of the time of this writing, rain had reached into much of Fresno County and it will move into the…

February 26, 2018 Summary: A relatively cold low has now dropped southward into northern California.  The associated cold front is draped across the lower Sacramento Valley and is moving steadily southward.  There is a solid area of rain as far south as Santa Cruz along the coast and Modesto inland with snow showers now spreading…

February 25, 2018 Summary: yet another very cold morning by the standards of late February.  Some locations dipped below the 30 degree mark yet again.  There were actually isolated pockets in the mid 20s.  This is discussed below in the frost section.   Skies are mostly clear this morning over central California.  Now it’s time…

February 24, 2018 Summary:  The latest very cold low pressure system is now sweeping through the Great Basin.  High clouds are spilling into California along the far western side of the system.  It’s possible some light snow showers could occur this afternoon and evening, mainly over the highest elevations of the Sierra Nevada.  One of…

  February 24, 2018 Summary: Well, it’s Saturday and it will end the roughest week of the winter season as far as critical low temperatures are concerned.  Last night was no exception as the coldest readings I could find as of 6:00am were 23 degrees at a Madera station and 24 at Steel Ranch.  Every…

February 23, 2018 Frost Update: As of 10:00pm, the coldest readings so far were 28 at Navalencia, 29 at west Porterville, and a number of locations between 30 and 32 with a few still in the mid 30s.  the fact that the coldest locations are already reaching the 28 degree threshold means durations over 8…

February 23, 2018 Summary:  Two elements of the weather are quite evident this afternoon.  Number one is that it’s colder than yesterday and number two, it’s breezy.  There are also considerable upslope clouds developing against the west facing slopes of the Sierra Nevada from Tulare County southward and banking up against the valley facing slopes…

February 23, 2018 Summary: A very fast moving low pressure system zipped through the valley overnight with no precipitation that I know of outside of some light snow showers over the Sierra and over the Kern County mountains.  Skies cleared rapidly and are mostly clear as of the time of this writing with the exception…