Monday, August 21, 2017

Weather Discussion for Monday July 21, 2017

Normal high and low temperatures for Aug 21-Aug 28 (high/low)...Redding 96/61, Chico 94/57, Quincy 87/41, Chester 82/41, Susanville 85/47, Grass Valley 85/54, Weaverville 92/47, Mt. Shasta 82/46, Yreka 88/49, Alturas 85/41

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.

A weak upper level low pressure area is off the Southern California coast.   This system is beginning to pull more moisture northward and this will result in afternoon and evening thunderstorms over the higher elevations east of the valley.  Temperatures today will be about like yesterday, although the dense smoke will affect them in some areas.  Tuesday a low pressure trough will move toward western Canada and this will kick the off shore low out to the northeast.   Tuesday we will see an increase in thunderstorms over all the higher elevations of the north state with a slight chance of one in the north end of the valley.   Temperatures will cool to just above normal.

Wednesday and Thursday the inland areas of the north state will be sunny (smoky) with temperatures a couple of degrees above normal.  There will still be some afternoon and evening thunderstorms over the higher elevations east of the valley Wednesday.

Friday through early next week a strong high pressure ridge will be over the western U.S. (see map below).  This will bring a return of hot weather to the north state. 

The Old Forecaster.

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3 comments:

  1. are these the first signs of a changing weather pattern?...moving towards autumn?thank you

    ReplyDelete
  2. Yes. You start to see troughs moving by to the north. However, the western U.S. high has been persistent and won't go easily.

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