Monday, January 2, 2017

Weather Discussion for Monday January 2, 2017

Normal high and low temperatures for Jan 2-Jan 9 (high/low)...Redding 52/35, Chico 52/34, Quincy 44/22, Chester 40/19, Susanville 38/19, Grass Valley 52/31, Weaverville 45/27, Mt. Shasta 42/25, Yreka 43/24, Alturas 40/14

This blog will be issued every Monday morning and updated if the weather is changing or critical or interesting weather events are occurring.

Because of the incoming storms I will update this blog daily at least through midweek. 

Very complex and interesting weather pattern continues to develop.  A cold low pressure area is now along the Southern Oregon/Northern California coast.  This has pushed a very cold airmass over the north state but there isn't a lot of moisture associated with it.  However, starting late today the low will move back to the west and this will allow it to merge with the warmer moister low pressure area that is out in the Pacific.  The warmer moister air will collide with the colder airmass over Northern California late tonight and Tuesday.   The low will then move eastward across our area on Wednesday. (see map below)

Not trying to make excuses but this is the type of pattern where a few miles difference in the boundary between the cold and warm air means the difference between heavy rain or heavy snow in areas like Redding and the I-5 corridor to the north.

Today the north state will have partly cloudy to cloudy skies with snow showers over the foothills and mountains.  They will be a little more widespread than yesterday.  There is a chance of light shower in the valley.  Snow levels in the Redding area will be near 1000 feet.  The precipitation will increase across Northern California late tonight and Tuesday.  Cold air will be trapped in the north and snow levels from Redding northward will be 500 to 1000 feet.  South of Redding the snow levels will be 1500 to 2500 feet.  Snow levels will rise Tuesday night to 4000 to 5000 feet.  Gusty south winds will precede this storm.   Wednesday the precipitation will turn to showers in the afternoon and end by evening.  Snow levels will remain near 5000 feet.

Thursday and Friday will be partly cloudy to partly sunny and then another strong low pressure area moves through on the weekend. 

The Old Forecaster

Click on images below to enlarge them...

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