Normal high and low temperatures for Oct 17-Oct 24 (high/low)...Redding 77/48, Chico 77/46, Quincy 68/31, Chester 65/31, Susanville 64/34, Grass Valley 71/42, Weaverville 72/34, Mt. Shasta 65/35, Yreka 66/35, Alturas 65/27
This blog will be issued every Monday morning and updated if the weather is changing or critical or interesting weather events are occurring.
The high pressure that has been over our area is weakening and shifting eastward. The low pressure area shown on this morning's satellite picture (below) in the Gulf of Alaska is moving southeastward and will be off the Pacific Northwest coast by late Sunday. This system will bring increasing clouds to the area on Sunday and then light rain or showers Sunday night and Monday. Snow levels will be high. Gusty south to southwest winds will occur Sunday night and Monday. Tuesday the low will move northeastward into Western Canada (see map below). Tuesday there will still be showers along the coast range and over Trinity and Siskiyou counties with partly cloudy to partly sunny skies elsewhere.
After Tuesday all the forecast models have a different solution or forecast for the next several days. If you look at the map below you can see that as the low moved into Western Canada, another low pressure area has dropped southward and is a few hundred miles off our coast. This low will have a lot of moisture with it and the southwest flow ahead of it will push that moisture over California. One model holds the low off the coast and weakens it....one sends it over Northern California and one sends it over southern California. At this time I think it will move over Northern California later in the week. So Wednesday there will still be showers over the coastal and northern mountains with partly cloudy to partly sunny skies elsewhere. Thursday and Friday look cloudy with periods of rain or showers. Snow levels will be high.