Monday, May 17, 2021

Weather Discussion for Monday May 17, 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. 

Today and most of Tuesday will clear with temperatures a little cooler each day.  Winds will be light in the morning and southerly in the afternoons. 

Late Tuesday a low pressure trough will be approaching the coast.  This low will move slowly across Northern California Wednesday and Thursday and will be over Southern Nevada by Thursday night (see map below).  Wednesday and Thursday look partly cloudy to cloudy with scattered showers and possible thunderstorms.  Temperatures will be below normal and gusty southwest to northwest winds are expected. 

Friday things get a little strange.   The low will begin to move almost straight northward and will merge, on the weekend,  with low pressure area that will be approaching the Canadian coast.  Friday looks partly cloudy with showers over the areas north and east of the valley.  Late Saturday and Sunday a weak frontal system will bring more light showers to the foothills and mountains with isolated showers possible in the north end of the valley.  Temperatures will continue below normal through the weekend. 

Clear skies and slightly above normal temperatures return to the north state early next week. 

The Old Forecaster
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  1. do you think we are still getting some snow i the higher elevations ?
    And what do you mean when you say things get strange Friday? Thanks

  2. There could be a dusting of snow above 6000 feet. It is strange that it moves almost due north. Normal movement would be northeast or east.

    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