Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Diego California
430 am PDT Tuesday Jun 2 2015
a low pressure system developing near the California coast will
bring deepening of the marine layer through Friday along with a
gradual inland cooling trend. Onshore flow will bring locally
gusty west winds to the mountains and deserts each late afternoon
through late evening. Moisture from the remnants of Hurricane
Andres could also bring a few high clouds late in the week. For
next weekend through early next week...low pressure and onshore
flow will weaken with an inland warming trend and a gradually
shallower marine layer. There is a small chance early next week
for moisture from the remnants of tropical cyclone Blanca to
spread into portions of Southern California.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
A low pressure system will move inland through the Pacific
northwest today with a second low pressure system moving to near
the California coast on Wednesday...then lingering over California
and Nevada through Saturday. This will bring an inland cooling
trend through Friday with deepening of the marine layer.
Satellite imagery early this morning shows greatest stratus coverage
over the coastal waters with patchier coverage extending inland into
portions of the western valleys. Coverage is expected to gradually
increase over land areas inland into to the western valleys
through sunrise. Coverage is expected to extend farther into the
valleys for following nights with patchy late night and early
morning drizzle possible from the deeper marine layer.
For late in the week...the global models are in closer agreement
with the placement of the closed upper low over Southern
California and the northeastward transport of moisture from the
remnants of tropical cyclone Andres taking the bulk of that
moisture into Arizona.
For the weekend through early next week...low pressure and onshore
flow will weaken over Southern California with an inland warming
trend and gradually shallower marine layer. For early next
week...there is a small chance of moisture from the remnants of
tropical cyclone Blanca to be drawn northward into portions of
Southern California with the more significant moisture more likely
headed into Arizona.
020900z...low clouds will continue to form and spread locally inland
this morning...but will not be very extensive. Bases will be around
1500 feet mean sea level with tops to 2000 feet...with local visible below 5sm
where terrain meets cloud base. Scatter out is expected by 16-17z.
Low clouds with bases around 1500 feet will develop and move ashore
after 02z this evening and spread pretty far inland overnight.
200 am...no hazardous marine weather is expected through Saturday.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.