Scientific Forecaster Discussion
fxus66 ksto 202116
Area forecast discussion
National Weather Service Sacramento California
216 PM PDT Sat Jul 20 2019
Gradual warming trend is forecast into next week with widespread
triple digits possible in the Central Valley by next Wednesday.
There is a slight threat of afternoon thunderstorms over the
northern Sierra crest throughout the week.
Weak upper troughing moves east and out of the area today as
ridging builds into northern California. Afternoon highs are only
slightly up from yesterday with valley temperatures ranging from
the low to upper 90s, with the exception near the Delta where
temperatures stay in the 80s. Visible satellite early this
afternoon shows building cumulus over the Sierra crest in
alpine/Tuolumne counties and an isolated thunderstorm may be
possible late afternoon and early evening in this location with
little rainfall expected.
Temperatures will continue to increase through mid-week with high
temperatures Tuesday in the upper 90s for most valley locations.
Models indicate some weak upper disturbances which may allow for
some more isolated storms to the Sierra crest with the best
chances on Tuesday.
Extended discussion (wednesday through saturday)...
Hot weather is expected to continue through the extended period.
Ensemble models continue to show the monsoon high pressure
centered over The Four Corners region building northwestward
Wednesday through Friday. This will cause temperatures to rise
around 5 to 10 degrees above normal across interior norcal. The
expansion of the high will also allow monsoonal moisture to move
west. There is a chance of afternoon thunderstorms over the High
Sierra, mainly south of Lake Tahoe. Hec
VFR conditions next 24 hours. Local southwest wind gusts 25-30
kts near ksuu, otherwise winds less than 15 kts.