Issued Zones: Southern half of Santa Barbara County … Ventura County …
Site: Southern California Weather Force has issued a Thunderstorm Watch effective now through Saturday morning
Date: 10/12/18 at 9:20am PT
Forecast: Pacific Storm Peter is a cutoff low system that is placed in center the Martin Storm Diamond. The Martin Storm Diamond is an imaginary diamond that is southwest of the forecast area. The center of storms that travel through this area have the best upper dynamics in our region, being northeast of the systems themselves. This region is what I look for when diving into confidence that we would see something over our land forecast area of Southern California.
The upper divergence, moisture, and instability profiles have not been seen this strong since Pacific Storm Avery in Sept 2007, which delivered an incredible lightning show to LA/OC and part of the Inland Empire. The divergence profiles suggests the VT/SBA area will be on the north end of the system, which does have lifting as well for thunderstorm activity. It however will not be as severe as further east in the issued Severe Thunderstorm Watch zone. Storms will move from east to west of the watch area through this evening, tonight, and into Saturday morning.
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10 mile rule: These alerts issued on this site means that within your zone and 10 miles from you will see the event forecast for. You may or may not see the event but it means you are in the zone or 10 miles from where someone will.
Forecaster: KM