Saturday, May 22, 2021

Weather Discussion for Saturday May 22, 2021

 Normal high/ low temperatures for May 17-May 24 (high/low) Redding 82/54, Chico 82/51, Quincy 74/38, Chester 69/35, Susanville 72/40, Grass Valley 73/46, Weaverville 77/40, Mt. Shasta 69/41, Yreka 75/42, Alturas 69/36

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. 

The low pressure area over Nevada is moving northward.  Sunday the low will begin move eastward as it reaches the Canadian border.  Today the backwash from the low will push some clouds over Northern California, with scattered showers over the higher elevations north and east of the valley.  Temperatures will be below normal.  The gusty north winds will continue today but will end late tonight with light winds Sunday..  Sunday there will still be some isolated showers near the California/Nevada border with sunny and warmer conditions elsewhere.  

Monday a weak low pressure area will move through the Pacific Northwest (see map below).  The southern end of this system will trigger a few showers over the areas north of Redding.  Temperatures will be near normal with gusty southwest to northwest winds.

Tuesday high pressure begins to slowly rebuild over the west coast.  Tuesday through the end of next week look mostly clear.  Temperatures will be above normal.  Gusty north winds will occur Tuesday and Wednesday.

The Old Forecaster
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  1. Thanks. I have been observing the LP cut off that was over nor cal on the 14 ( looking at the visible map ) . It almost disappeared as it moved across the rocky for then come back over the plains and start to pull moisture from as far the gulf of mexico.
    How come the Lp did not loose strength , but actually intensified moving west? Where that energy is coming from?
    Why is it able to pull moisture form the gulf and create precipitations , but while on the west coast did not pull any moisture from the pacific? Thanks

  2. Low pulls moisture usually from southeast. Once the low clears the Rockies the southeast flow is from the gulf which is also much warmer than the Pacific off the Norcal coast.