Scientific Forecaster Discussion
fxus66 ksto 290406
Area forecast discussion
National Weather Service Sacramento California
906 PM PDT Wed Jun 28 2017
warmer with daytime highs 5 to 10 degrees above average through
Saturday followed by slight cooling to more seasonal temperatures
early next week.
onshore pressure gradient is a healthy 3.9 mb between sfo-SAC and
the Delta breeze is expected to stay up through the night once
again. Marine layer is currently at around 1500 feet. Many
temperatures in the region should cool into the mid to upper 50s
by morning with the north end of the valley cooling to the mid to
upper 60s. Mountain Valley temperatures cooling into the 30s and
40s once again.
High pressure will be building over the region on Thursday and
bring slight warming over today's highs for the Sacramento region.
A little bit more warming over the north end of the valley is
expected with light north winds persisting into the afternoon
helping to warm temperatures to the century mark. Further south it
looks like we will keep a flow through the Delta during the day
similar to today's daytime strength.
ridging over the eastern Pacific builds into norcal through this
week bringing a warming trend to our daytime highs. The Fort Ord
profiler along the coast shows a decreasing marine layer which
will weaken onshore flow and aid in the warmer temperatures by
suppressing the Delta breeze the next few days. Daytime highs will
range about 5 to 10 degrees above normal through Saturday. Valley
highs will see upper 90s to low 100s with higher terrain in the
80s and 90s.
Delta breeze will start to return Friday morning, but will
strengthen a bit Saturday morning as a short-wave moves across
norcal. This could bring in some patchy low clouds during the
morning hours on Saturday. It should also allow for a degree or
two of cooling, compared to Friday, especially for Delta breeze
influenced areas (sacramento Metro region to stockton). It's
doubtful any convection will occur from this short-wave given the
dry airmass. Jbb
extended discussion (sunday through wednesday)
Dry conditions will prevail across interior norcal through the
extended period. Broad upper trough deepens over the Pacific
northwest early next week, resulting in minor cooling as the ridge
flattens. However, highs will still remain at or above normal.
Slightly cooler temperatures are expected Monday-Wednesday. High
pressure ridging expands northward across the region by the
middle of next week.
VFR conditions the next 24 hours. Winds will remain south to west
today, generally below 10 kt across valley taf sites. Near the
Delta...SW wind gusts up to 30 kt possible.