Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Diego California
900 PM PDT Sat Aug 30 2014
strong rip and longshore currents will continue along the beaches
through the Holiday weekend. Increasing onshore winds will
continue the cooling trend from the coast to inland areas through
next week. The marine layer will deepen...with night and morning
low clouds and fog developing into the inland valleys. Dry weather
is forecast through next weekend.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
Clear and warm conditions persisted today across the region. The
warmest temperatures were in the Coachella Valley where Palm
Springs hit 114 degrees, which is about 9 degrees above normal.
Latest upper air sounding from Miramar this evening shows a very
dry sounding and a very weak marine inversion in place. However
with increasing onshore gradients and a coastal eddy likely to
form later tonight...we still expect a decent marine push inland
by morning with stratus decks and patchy fog into the inland
valleys by daybreak.
For Sunday...temperatures are expected to moderate another few
degrees for inland areas due to lowering 500 mb heights. For
coastal areas...the stronger onshore gradients and subsequent
marine push may keep the immediate coastal areas a few degrees
cooler as well.
For the evening update...just made a tweak to the cloud cover
forecast to account for the slower development this evening of the
marine stratus decks and also nudged temperatures up a bit for the inland
areas Sunday given the latest trends.
310330z...coast/valleys...low clouds returning to the coast through
09z as a coastal eddy slowly develops. Within 15-25 miles of the
coast...cloud bases will be 1100-1500 feet mean sea level with tops 1700-2300 feet
mean sea level through 15z. Reduced visible will occur where low clouds intersect
higher terrain. Expect low clouds to clear back to the coast
16-18z...with a few lingering low clouds possible along the coast in
the afternoon. Low clouds returning to the coastal airports Sunday
evening from 03-07z.
Mountains/deserts...unrestricted visible with few clouds at or above 20000 feet
mean sea level through Sunday evening.
800 PM...no hazardous marine weather expected through Wednesday
a long-period southwest swell will continue to produce periods of
strong rip and longshore currents at the beaches through Monday. A
beach hazards statement is in effect for the Orange and San Diego
County beaches through early Monday evening.
California...beach hazards statement through Monday evening for the beaches
in the Orange County coastal areas...San Diego County