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sunnyside up
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Discussion Starter · #1 ·
Got this in my weatherunderground email just now:

Severe Thunderstorm Watch

urgent - immediate broadcast requested
Severe Thunderstorm Watch number 23
NWS Storm Prediction Center Norman OK
1250 PM PST sun Jan 27 2008

The NWS Storm Prediction Center has issued a
Severe Thunderstorm Watch for portions of

southern and central California
coastal waters

Effective this Sunday afternoon and evening from 1250 PM until
600 PM PST.

Hail to 1 inch in diameter...thunderstorm wind gusts to 70
mph...and dangerous lightning are possible in these areas.

The Severe Thunderstorm Watch area is approximately along and 70
statute miles either side of a line from 50 miles northwest of
Fresno California to 20 miles southeast of Oxnard California.
For a complete depiction of the watch see the associated watch
outline update (wous64 kwns wou3).

Remember...a Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings. Severe thunderstorms can and occasionally
do produce tornadoes.

Discussion...convection is deepening attm along several confluence
bands ahead of vort lobe ejecting NNE toward the cntrl CA CST. The
convection likely will intensify into tstms through the remainder of
the day as sfc heating and ascent further destabilize region. Given
existing wind field /ref previous convective outlooks/...potential
will exist for short line segments and even a few discrete storms
that could yield hail and locally damaging wind.
Topographically-induced backing of the near-sfc flow along the Santa
Barbara-Oxnard corridor ...and invof line breaks in the cntrl
Vly...may also spawn a tornado or two before activity weakens with

Aviation...a few severe thunderstorms with hail surface and aloft
to 1 inch. Extreme turbulence and surface wind gusts to 60 knots.
A few cumulonimbi with maximum tops to 350. Mean storm motion
vector 22040.



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