069
FXUS66 KSTO 102002
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
102 PM PDT Thu Oct 10 2024

.Synopsis...
Our cooling trend continues through this week with a weak weather
system bringing light rain late Friday night into Saturday north
of I-80. Below to near normal temperatures are expected to
continue through next week.

.Discussion...
The cooling trend continues today, with 12PM temperatures already
2 to 10 degrees cooler than they were at the same time yesterday.
High clouds are moving quickly across interior NorCal as well,
with onshore flow bringing those lower temps and slightly higher
relative humidities.

A weak shortwave trough will bring daytime highs down a few more
degrees on Friday, with Valley temperatures ranging from the low
to mid 80s. Additionally, this will bring breezy onshore winds on
Friday and light precipitation early Saturday(primarily north of
I-80 with highest chances in and along the northern Coastal
Range). Rainfall totals will be somewhat limited, ranging
generally between 0.10 and 0.25 inches over a 24 hour period from
late Friday to late Saturday. The majority of rain will occur
early Saturday. Temperatures Saturday will be near to slightly
below normal. On Sunday, ridging will briefly attempt to build
back into the area, bringing temperatures back up to normal and
making conditions generally dry and calm.

&&

.EXTENDED DISCUSSION (Monday THROUGH Thursday)...
Calm, dry conditions continue through early next week, with
Valley highs generally in the low to mid 80s. Mid-next week, a
stronger trough will progress inland from the eastern Pacific,
bringing temperatures back down to the 70s. Some ensemble
solutions are showing potential for the low to drop down over
California from the north. If that pattern occurs, this would
likely bring a north wind event mid to late next week. There is
still quite a bit of uncertainty with this system so other
solutions are still very possible (including some solutions
involving light precipitation in the region); regardless we will
be keeping an eye on the evolution of the pattern over the next
couple of days to monitor any potential for elevated fire weather
concerns next week.

&&

.AVIATION...
VFR conditions over interior NorCal next 24 hrs outside of
localized areas of smoke/haze across the Northern Sacramento
Valley affecting KRDD through Fri 18Z. Sfc wind mainly below 12
kts outside of gusts up to 15 kts in the vicinity of the Delta.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$