Monday, July 24, 2017

Weather Discussion for Monday July 24, 2017

Normal high and low temperatures for July 24-July 31 (high/low)...Redding 100/67, Chico 97/61, Quincy 91/45, Chester 88/47, Susanville 90/52, Grass Valley 90/58, Weaverville 97/50, Mt. Shasta 89/52, Yreka 94/54, Alturas 90/46

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 strong high pressure area continues over the western U.S.  There is a weak upper level low pressure area off the Northern California coast.  The low will remain off the coast through Tuesday and then dissipate Wednesday as it moves into the high pressure area.   This morning's satellite picture (below) shows the southerly flow around the west side of the high pressure area is pulling subtropical moisture (clouds) northward.   This moisture coupled with the instability of the low will result in afternoon and evening thunderstorms today and Tuesday over the higher elevations to the north and east of the valley.  Temperatures today and Tuesday will be normal to 5 degrees above normal.  Winds will be light in the morning and southerly in the afternoon.  Wednesday we will see mostly sunny skies with a chance of afternoon and evening thunderstorms along and east of the Sierra Cascade Crest.  Temperatures will be near normal.

Thursday through the weekend the high pressure ridge rebuilds over the west (see map below).  This will result in hotter weather.  

The Old Forecaster.

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