Saturday, August 19, 2017

Weather Discussion for Saturday August 19, 2017

Normal high and low temperatures for Aug 14-Aug 21 (high/low)...Redding 97/63, Chico 95/58, Quincy 88/41, Chester 83/43, Susanville 87/49, Grass Valley 86/55, Weaverville 92/47, Mt. Shasta 84/48, Yreka 89/50, Alturas 87/41

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.

High pressure continues off the west coast and will hold there through Tuesday.   During the next 24 hours a weak upper level low pressure area will form off the Central and Southern California coast (see maps below).   The low will remain off the coast through Tuesday night.  Today through Monday the north state will have sunny and smoky skies with afternoon cumulus over the Sierras with a chance of thunderstorms from Mt. Lassen southward.  Temperatures will continue 6 to 12 degrees above normal although the smoke will reduce them in some areas.   Tuesday temperatures will cool slightly and the thunderstorms will be more widespread with a chance of a shower or thunderstorm in the north valley.  

Wednesday and Thursday a low pressure trough will move through the Gulf of Alaska.  This will weaken the off shore high pressure area and kick the low off the Southern California coast eastward.   We will see just a few high clouds from this system but it will bring cooler air into the north state with temperatures back to near normal.  

Friday through next weekend high pressure will once again to just to our east and we will see a return of above normal temperatures

The Old Forecaster.

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