Wednesday, September 13, 2017

Weather Discussion for Wednesday September 13, 2017

Normal high and low temperatures for Sept 11-Sept 18 (high/low)...Redding 90/58, Chico 89/54, Quincy 81/37, Chester 77/36, Susanville 78/43, Grass Valley 81/49, Weaverville 86/42, Mt. Shasta 77/44, Yreka 82/46, Alturas 78/36

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.

Finally some changes to talk about...

The low pressure area is still off the coast but is beginning to move eastward as a low pressure trough drops southeastward through the Pacific Northwest.   The combination of these two will cause isolated showers and thunderstorms over the higher elevations today and over Lassen and Modoc counties Thursday.   Temperatures today will be cooler but still 4 to 8 degrees above normal.  Temperatures Thursday will be normal to a few degrees below normal.  Light south winds today and then light moderate southwest to northwest winds Thursday.

Friday and Saturday the north state will be mostly clear with a few mid and high clouds Saturday from a storm moving by to the north.  Temperatures will be near normal.  Gusty north winds will occur Friday and early Saturday.

Sunday things start to change as the first "fall like"  low pressure trough deepens along the west coast and over the western U.S. (see map below).  Clouds will begin to increase Sunday.  Sunday night and Monday there will be light rain or showers along coast and over the coastal mountains from Mendocino county northward....over the areas north of Redding and over the Cascade Sierras from Plumas county northward.   In the valley there will be light showers or sprinkles from Red Bluff northward.  Tuesday there will be light rain or showers over the areas north and east of the valley.   Temperatures will be cooling and will be 10 to 20 degrees below normal by Tuesday.   Gusty southwest winds will occur Sunday afternoon and Monday. 

Wednesday the trough will be east of our area.  Clear skies and gusty north winds are expected. 

The Old Forecaster.

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