California Weather Blog: After burst of early-season heat, a sudden shift to active weather across California

Weather BlogFrom Daniel Swain at the California Weather Blog:

Essentially all of California received an early taste of summer-like temperatures this week. A very strong ridge of high pressure aligned with the West Coast brought very warm to hot conditions to a wide region–and and a number of temperature records were set on Wednesday from Southern California all the way north into British Columbia. This intense (but thankfully brief) heatwave comes on the heels of a period of relatively quiescent conditions across California.

The rainy season is apparently not over yet, however, as a series of fairly robust storm systems are expected to sweep across all of California in the coming days. As of this writing, an unusually positioned cut-off low well to the southwest of Los Angeles is slowly moving northeastward, spreading mid and high-level subtropical moisture across the state. This low will continue to move closer to the SoCal coast tomorrow, bringing an increasing chance of showers in the very moist subtropical airmass. On Friday, this moisture plume will continue to spread northward, and showers will likely develop across most of NorCal as well. At the same time, a somewhat weaker but much colder Pacific system will begin to approach from the northwest, eventually merging somewhere near central California over the weekend. …

Read the full post at the California Weather Blog here: After burst of early-season heat, a sudden shift to active weather across California

 

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