Scientific Forecaster Discussion
fxus66 ksgx 111002
Area forecast discussion
National Weather Service San Diego California
202 am PST Mon Dec 11 2017
high pressure and offshore flow will keep the weather warm and
dry for the coming week.
Discussion...for extreme southwestern California including Orange...
San Diego...western Riverside and southwestern San Bernardino
Winds are fairly well-behaved this morning with top gusts in the
foothills over 30 mph, but much weaker elsewhere. A weak low
pressure system to our south continues to spin a bunch of high
clouds overhead. Sunrise and sunset should be beautiful again
today. High pressure aloft will continue to dominate this week and
that low pressure system will gradually slide east and take most
of the high clouds with it. Offshore winds will continue in the
forecast the next few days, but mainly in the foothills and
portions of inland valleys. Top gusts would reach 30-40 mph. The
offshore flow will keep the air plenty dry and temperatures mild.
Warm days will be followed by cool nights, except warm nights where
breezes persist. No surprise that daytime temperatures will
remain way above average for December, by 15-20 degrees or so. The
offshore flow diminishes some for the latter half of the week as
a shortwave trough moves through the interior west to help turn
flow onshore. By Saturday we could be fully onshore albeit weak.
The longwave pattern of high pressure over the west and low
pressure over the east shows no signs of shifting as we head into
next week. Offshore flow will prevail, but without strong winds,
and the dry and warm weather will continue.
110930z...sct-bkn clouds at or above fl200 and unrestricted vis through
no hazardous marine weather is expected through Friday.
very low humidity will continue this week, with 5 to 10 percent
minimums inland each day and generally poor nocturnal recovery.
Offshore winds will continue in the foothills and locally into
inland valleys 15-25 miles per hour with gusts near 40 miles per hour through Wednesday.
Winds will be lighter Thursday through the weekend, and humidity
will increase, but only a little.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.