Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Sacramento California
859 am PDT Sat Jul 30 2016
a cooling trend to begin today as the dominating high pressure
pattern weakens. Near normal temperatures are expected by Sunday
with dry weather through the extended.
Short term discussion (today through tuesday)...
twenty four hour temperature trends are mixed at this hour. Some
stations are showing temperatures are running slightly warmer but
most are indicating temperatures are running slightly cooler. The
marine layer is at around 1400 feet deep and we have decent flow
through the Delta. The winds through the Delta are stronger today
at this time and are expected to remain breezy all day. This will
help to bring a cooling trend.
A trough of low pressure moving into the Pacific northwest will
help to push the high pressure area south slightly to bring some
synoptic cooling to the region. This will also help to keep
monsoonal moisture well to the south of our area. The current low
pressure area will be replace by another one on Monday and
Tuesday. Expect a cooling trend today and Sunday then little
changes in temperatures the next couple days.
The San Joaquin Valley air pollution control district is
continuing their air quality alert for San Joaquin County and
southward into Monday.
Extended discussion (wednesday through saturday)
Dry weather expected Tuesday through Friday. Broad upper
troughing main synoptic feature through the extended forecast
period. This will result in seasonable temperatures with some
Delta flow and influence into the interior. High temperatures
expected mainly in the 90s for the Central Valley except around
100 in the northern Sacramento Valley. Max temperatures for the
foothills and mountains forecast from the 70s at the highest
elevations to lower 90s at the lowest.
VFR conditions the next 24 hours. Light winds this morning will
become south to west 5-15 kt this afternoon and evening across
valley taf sites. SW gusts to 25 kt continue near the Delta.