Monday, April 19, 2021

Weather Discussion for Monday April 19, 2021

Normal high/ low temperatures for April 19-April 26 (high/low) Redding 74/48, Chico 74/45, Quincy 66/33, Chester 58/30, Susanville 63/35, Grass Valley 63/41, Weaverville 69/36, Mt. Shasta 62/35, Yreka 66/36, Alturas 61/30

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 is off the coast.  Today will be about like yesterday.  Temperatures will be above normal with the north end of the valley back near the 90 degree mark.  Winds will be light northerly.  

Tuesday and early Wednesday a weak upper level low pressure area will drop southward across Northern California.  This system will bring clouds to our area with a few light showers mainly over the foothills and mountains.  Temperatures will cool a few degrees but will still be above normal. Gusty north winds will occur Tuesday and Wednesday. 

Thursday and Friday we will be back to sunny skies and above normal temperatures.  

Saturday a major change in the weather is forecast to begin to develop.   The jetstream will undercut the high pressure ridge that is to our west.   This will allow a low pressure trough to form along the west coast (see map below).  This low will generate frontal systems and send them inland.  The question is whether the the storms will go inland over the Pacific Northwest or over Northern California.  At this time it looks like periods of rain or showers Saturday afternoon through Monday and more precipitation late Wednesday and Thursday.

The Old Forecaster
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