Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 270420

920 PM PDT Tue May 26 2015

Gradually warmer temperatures this week with some afternoon and
evening mountain showers and thunderstorms through mid-week.
Strengthening high pressure brings warmer weather with high temps
peaking at 5 to 10 degrees above normal Thursday into Saturday.


Temperatures are near what they were last night and will continue
to cool off to mainly into the 50s for the valley to the 30s and
40s for the mountain valleys. A decent delta breeze will continue
for most of the night. Low clouds in the western delta this
evening may spread locally into the Sacramento region towards
morning once again.

The low only moves slightly eastward from Today into Wednesday so
expect a slight decrease in activity with slight chances for
thunderstorms over the mountains for mainly the same locations
that they occurred today. Temperatures will be similar on Wednesday
as today with perhaps a degree or two warming over the interior.

On Thursday we will start to notice temperatures getting warmer...
warming up into the mid 80s to lower 90s in the valley...with
continued warming for Friday as a high pressure ridge builds over
the west coast. Isolated thunderstorms over higher terrain look
possible both days. We should continue to get delta breezes
through the end of the week to help cool off the interior each


.Extended Discussion (Saturday through Tuesday)

High pressure ridge will shift east on Saturday and Sunday into
the Great Basin in advance of next low pressure system. Dry
weather, mostly sunny skies, and above normal temperatures will
continue for the weekend. Daytime highs will be a few degrees
cooler from Saturday to Sunday as ridge axis shifts east. Next
system, currently around 150W, will slowly shift southeast into NorCal
by Monday. Models in better agreement over past few runs with best
chances for any precip across northern mountains and have
introduced slight shower and thunderstorm chances Sunday and Monday.
This should bring cooler temperatures for the start of
the work week, with daytime highs near or slightly below normal.



VFR conditions expected over next 24 hours across the valley.
Delta breeze will continue to cause locally gusty winds with gusts
to 35 kts. Marine stratus starting to creep into the west Delta
may reach Sacramento sites in the morning with local IFR/MVFR cigs.
A few showers and thunderstorms across higher terrain aft 20z may
lead to brief MVFR restrictions once again on Wednesday.


.STO Watches/Warnings/Advisories...

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