Wednesday, September 19, 2007
Rare "wet & cold" storm to move into the southland late week
An unusually rare event... a winter like storm will affect the southland late this week with rain, wind and high elevation snows.The southland on Thursday will begin to see the first effects of the storm system will be a deep marine layer (which will even sock in the mountains)...additionally gusty winds winds will blow over the mountains and deserts through Thursday.
Additionally with deep marine... will be a slight chance of light rain or drizzle (mainly Trace to 0.01" amounts) through Thursday afternoon.
The main event will come late Thursday through Friday night. As indicated in the above graphic... the upper level low pressure will dive south and should be located just southwest of Pt. Conception by midday Friday. This system will become detached from the main upper level flow over the west and will park just off the coast through Saturday.
Result... will be widespread shower activity across the southland and snow showers possible over the mountains (mainly above the 6,000' level).
Preliminary rainfall forecasts for the southland as follows:
Coastal plain/valleys: 0.25" to 0.75"
Coastal foothills and slopes: 1.00 to 1.25"
Mountains: 0.75 to 1.25"
Some favored west/southwest facing slopes in the San Bernardino mountains and the west/southwest facing slopes in Ventura and Santa Barbara counties may see locally higher amounts.
Along with the likelyhood of rain on Friday and Friday will also come the risk of thunderstorms over the coastal plain and valley areas.
It's not out of the question for waterspouts in the coastal waters or a weak EF 0 Tornado in the coastal plain on Friday.
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