Wednesday, September 20, 2017

Weather Discussion for Wednesday September 20, 2017

Normal high and low temperatures for Sept 18-Sept 27  (high/low)...Redding 90/56, Chico 88/52, Quincy 80/35, Chester 76/35, Susanville 75/41, Grass Valley 81/49, Weaverville 85/40, Mt. Shasta 77/42, Yreka 80/43, Alturas 78/33

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.

A low pressure trough is dropping southward along the west coast and over the western U.S. (see satellite picture  below).  This system will move across Northern California today and early Thursday with light rain or showers over the foothills and mountains and in the valley north of Red Bluff.  Temperatures today will be 15 to 25 degrees below normal.  Gusty southwest to northwest winds will occur this afternoon.  

Thursday the trough continues to slowly shift eastward.   Showers will continue over the areas north and east of the valley with partly to mostly sunny skies elsewhere.  Temperatures will continue well below normal.  The trough will continue slowly eastward as a high pressure ridge develops along the west coast. (see map below).  This ridge will bring mostly clear skies to the north state.  Temperatures start warming Friday and by weekend will be back above normal.  Periods of gusty north winds will occur Friday through early next week. 

The Old Forecaster.

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