Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Diego California
251 am PDT Sat Aug 1 2015
a weak trough of low pressure off the West Coast will maintain
drier southwest flow aloft across Southern California through next
week with lower level onshore flow and a marine layer bringing
night and morning coastal low clouds and patchy fog inland to the
western valleys. High temperatures will be near average with
locally gusty west winds in the mountains and deserts each late
afternoon through late evening.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
A very tranquil pattern will persist for much of the first half of
August. A weak trough of low pressure off the West Coast will
bring drier southwest flow aloft with weak onshore flow level
flow. The marine layer will be near 1500 to 2000 feet deep with
areas of night and morning coastal low clouds and patchy fog
extending inland into the western valleys. High temperatures will
be near average with locally gusty west winds in the mountains \and
deserts each late afternoon through late evening.
In the near term...high level moisture from the south will
continue to be drawn northward into Southern California ahead of
the weak trough of low pressure off the West Coast bringing some
cirrus clouds for enhanced sunrises and sunsets for those areas
not blocked by coastal low clouds. That higher level moisture will
be nudged to the east on Sunday and Monday by the trough off the
010930z...coast/valleys...stratus with bases 900-1300 feet mean sea level and
tops to 1800 feet mean sea level slowly spreading 20-25 Michigan inland this morning.
Stratus clearing to the coast 15-18z. Stratus will return to the
coastal airports 02/02-05z and move 25-30 Michigan inland overnight. Bases
and tops will be a couple hundred feet higher. Otherwise scattered-broken
clouds at or above 20000 feet mean sea level and unrestricted visible through Sun morning.
Mtns/deserts...sct-bkn clouds at or above 20000 feet mean sea level and unrestricted visible
through Sun morning.
235 am...except for wind gusts of 20-25 kts over the outer waters
Sunday and Monday evenings for a few hours...no hazardous marine
weather is expected through Wednesday.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.