I am going to give some quick hits on different areas today and not concentrate necessarily on one topic.

The Northwest:

A couple of decent storms will slam into the Northwest the rest of the week. The first will be Thursday into Friday and the next Saturday/Saturday night. While not overly strong, expect some decent rain amounts after all is said and done in western Washington and central and northern Oregon. Snow levels will also come down, lowering to 4,000 feet later Thursday and down to 3,000 feet Friday with showers between the two main storms. Snow levels come back up on Saturday ahead of the next front, at least to 5,000 to 5,500 feet. There also could be some thunder Friday with the showers. Also, expect some rain and snow to make it into eastern Washington, northeastern Oregon and much of Idaho.

The California Cooldown:

After some unseasonably warm weather of late with the jet stream lowering, expect noticeable cooling just about everywhere the rest of the week. Northern California, especially from the North Bay to the Sacramento Valley, could get a bit of rain Friday and sometime Saturday, but amounts will be light. The biggest cooldown will be in the valleys of southern California that will go from near 90 yesterday and today to the low to mid-70s by Thursday and Friday.

Southern California/Arizona Closed Low:

A break-off low from the main jet stream will move toward extreme southern California and the northern Baja later Friday and Friday night then into southern Arizona and northern Mexico on Saturday. This biggest unknown about this low is how much moisture it can capture or produce. There is not much doubt that the low will bring some clouds with it and that will be noticeable, especially in the desert areas. There is a shower possible, especially near the Mexico border in Southern California and then into Arizona. How much of a shower chance? That is the unknown that will be told about how much moisture this low can produce. However, it is NOT likely to be a major precipitation producer with any showers being on the light side, if they do indeed develop.

Posted by Ken Clark on Tuesday, November 03, 2009 1:16 PM
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