Saturday, December 23, 2017

Weather Discussion for Saturday December 23, 2017

Normal high and low temperatures for Dec 18-Dec 25  (high/low)...Redding 55/35, Chico 56/35, Quincy 44/24, Chester 42/20, Susanville 40/22, Grass Valley 54/31, Weaverville 46/29, Mt. Shasta 43/23, Yreka 43/24, Alturas 42/16

This blog will be issued every Monday, Wednesday, and Saturday morning and updated if the weather is changing or critical or interesting weather events are occurring.

This morning's satellite picture this morning, looks alot like the pictures of the past month.   High pressure continues off the California coast.  There continues to be a lot mid and high cloudiness spilling over the top of the ridge.  Sunday a low pressure trough and frontal system will move through the Pacific Northwest with the southern end brushing the north of our area.  We will have clouds with a few light showers over the northern mountains and Sierras north of Tahoe.  Snow levels will be 5000 to 6000 feet.  

Monday through Thursday a weak high pressure area will be back off the coast (see map below).  The north state will be partly to mostly sunny with mid and high cloudiness.  Daytime temperatures will be above normal and winds will be light.

Friday and Saturday another weak front will brush the north end of the state with a few mountain showers.

The extended models show a weakening ridge.  The European model is more aggressive and brings the jetstream right over the north state in early Jan.   The GFS, U.S. model, holds more of the ridge and drops the jetstream only as far south as Southern Oregon.

The Old Forecaster

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