Saturday, September 16, 2017

Weather Discussion for Saturday September 16, 2017

Normal high and low temperatures for Sept 11-Sept 18 (high/low)...Redding 90/58, Chico 89/54, Quincy 81/37, Chester 77/36, Susanville 78/43, Grass Valley 81/49, Weaverville 86/42, Mt. Shasta 77/44, Yreka 82/46, Alturas 78/36

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 clouds over Northern California this morning are from the southern end of a frontal system moving through western Canada.   There could be a few sprinkles over the areas near the Oregon border and the clouds will be clearing out during the afternoon. 

Sunday a low pressure trough begins to deepen over the western U.S. and Monday through Thursday we will be under a weather pattern like the one on the map below.   A large scale low pressure trough will be over the western U.S. and will send a series of frontal systems across our area.   The problem is that the trough is more over land than water and the storm systems won't have much moisture associated with them.  

The first system will move through Sunday night and Monday and will bring clouds to the area with a few light showers over the north coast and Siskiyou county.   Temperatures will be a little below normal and gusty southwest to west winds will precede this system.   Tuesday we will see partly sunny to partly cloudy skies and then 2 more frontal systems will be move through the north state.   One Tuesday night and Wednesday and the next Wednesday night and Thursday.   Once again we will see clouds and gusty southwest to west winds from these systems.  The Tuesday night system will bring light rain or showers to the north coast and Siskiyou and Modoc counties.  The Tuesday night Wednesday system will bring light rain or showers to the north coast, Siskiyou, northern Shasta, Modoc, Lassen, and Plumas counties.  Temperatures Tuesday through Thursday will be below normal. 

Friday the trough will shift a little eastward and the north state will have mostly sunny skies with warmer temperatures and gusty north winds.

The Old Forecaster.

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