Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Francisco Bay area
505 am PDT Thursday Jul 10 2014
Synopsis...typical Summer weather can be expected through the
work week with clouds overnight giving way to mostly sunny conditions
during the day for most locations. High pressure will build back
toward the area by the weekend leading to warmer conditions especially
across inland areas.
Discussion...as of 2:21 am PDT Thursday...the marine layer depth
has increased to around 2400 feet per The Fort Ord profiler and
the increased inland extent to the coastal stratus corresponds per
satellite view. Expect a slow burn off today of morning stratus
with high temperatures likely slightly cooler than those on
The cooling trend is expected to continue through Friday as strong
onshore flow persists. A gradual warming trend is then indicated
beginning over the weekend as high pressure aloft begins to build
over the state. Highs are expected to warm back towards 100
degrees in the warmest inland areas by Sunday...with 60s and 70s
at the immediate coast...and 80s and 90s inland. Will continue to
keep an eye out for encroaching monsoonal moisture next
week...although latest model guidance keeps this farther to the
east and south.
Aviation...as of 5:00 am PDT Thursday...a middle-level low pressure
system off the central California coast has brough a very deep
marine layer over the area with moderate southerly flow. Stratus
layer is not very extensive due to the southerly flow as stratus
has been kept out of the southern half of the sfo Bay area.
Stratus does cover sfo and the northern part of the approach. The
clearing will work its way north and sfo and the approach should
be clear by 18z.
Vicinity of ksfo...MVFR ceilings through 18z. Southerly winds 5-10 knots
switching to west around 15 knots after 19z.
Ksfo bridge approach...similar to ksfo.
Monterey Bay area terminals...IFR becoming MVFR after 15-16z
clearing after 18z.
Marine...as of 5:00 am PDT Thursday...a low pressure center
positioned just off the central California coast will bring light
southerly winds to the area through Friday night. Northwest winds
will return Saturday as the low moves north and high pressure
builds off the California waters.
Public forecast: Sims
aviation/marine: west pi
Visit US at weather.Gov/sanfrancisco
Follow US on facebook, twitter, and youtube at: