Scientific Forecaster Discussion
fxus66 ksgx 281058
Area forecast discussion
National Weather Service San Diego California
358 am PDT Tue Mar 28 2017
a low pressure system moving eastward from Arizona will bring
strong gusty north winds today. High temperatures will warm into
Wednesday with Wednesday high temperatures 10 to 15 degrees above
average. A low pressure system moving through the Great Basin into
the southwest states will bring inland cooling for Thursday and
Friday...strong gusty west winds for the mountains and deserts
Thursday...and gusty north winds for late Friday into Saturday.
Weaker winds with some warming for next weekend with high
temperatures around 5 degrees above average.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
Short term (today through thursday)...
a closed low pressure system over Arizona early this morning will
move into New Mexico this afternoon with high pressure aloft over
California for tonight and Wednesday. Strong north winds aloft
behind the low pressure system over Arizona will bring locally
strong gusty north winds along and below the coastal slopes of the
mountains of San Bernardino and Riverside counties...the Santa Ana
Mountains...and the northern Coachella Valley this morning...
decreasing during the afternoon. High temperatures will warm to
around 5 degrees above average today...and 10 to 15 degrees above
average on Wednesday.
For Thursday...a low pressure system will move southeastward into
the Great Basin bringing stronger onshore flow to Southern
California. This will bring strong and gusty west winds to the
mountains and deserts Thursday afternoon and evening. Some low
clouds and fog could return near the coast late Wednesday night
into Thursday. Cooling will begin to spread inland on Thursday
with greater cooling for coastal and valley areas and less cooling
Long term (thursday night through monday)...
a closed low pressure system will move into Arizona and New
Mexico on Friday...then move slowly eastward next weekend.
Coastal low clouds will extend into portions of the inland valleys
for Thursday night into Friday morning. High temperatures will
cool to near to slightly below average on Friday with another
round of gusty north winds for Friday into early Saturday. High
pressure aloft will bring warming next weekend with high
temperatures around 5 degree above average. A trough of low
pressure from the northwest will bring cooling for early next
280900z...clear skies expected today and tonight. Gusty north to
northeast winds 30-45 kts mainly in foothills and adjacent valleys
through about 20z. Low level wind shear possible at ksna, ksbd, kpsp, and kont
when/where winds do not quite surface mainly before 14z. Mostly
surfacing at these airports 14-20z and weakening thereafter.
a Small Craft Advisory remains in effect through 8 PM this evening.
Although winds will decrease this morning, they will pick up again
this afternoon and evening. See the forecast and the advisory for
details. Strong winds and large combined seas are expected again
late Thursday through Friday.
surf of 3 to 6 feet with occasional higher sets will continue at
times through early next week.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.
California...Wind Advisory until 2 PM PDT this afternoon for Riverside County
mountains-San Bernardino County mountains-San Bernardino
and Riverside County valleys-the inland Empire-San Gorgonio
Pass near Banning-Santa Ana Mountains and foothills.
Pz...Small Craft Advisory until 8 PM PDT this evening for coastal
waters from San Mateo Point to the Mexican border and out
to 30 nm-waters from San Mateo Point to the Mexican border
extending 30 to 60 nm out including San Clemente Island.