Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 250438
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
938 PM PDT TUE MAY 24 2016


.SYNOPSIS...
Showers and isolated thunderstorms possible across higher
elevations through Wednesday, although a few showers may linger on
Thursday. Warmer and mainly dry conditions by this weekend.

&&

.DISCUSSION...
Thunderstorms have seemed to taper but showers are continuing as
of 9 pm. The HRRR indicates the showers will continue to taper
til around 11 pm. Earlier thunderstorms had intense rainfall with
them. Only reports of flooding where north of Yuba City on a
couple of on/off ramps to highway 99 that have since been
cleared.

There is a low pressure area off the central coast that will move
into Southern California on Wednesday. This will keep unstable
conditions over the region with most of the activity focused over
the mountains and slight chances over the northern half of the
Sacramento valley. Model sounding suggest thunderstorms will
contain very heavy rainfall once again. Temperatures will continue
to be cooler than normal but several degrees warmer than Today for
most areas.

On Thursday the trough moves far enough to the east to dry out
most areas. Only some isolated afternoon showers over the
mountains near the crest look possible. Temperatures will warm
back up to near seasonal normals.

Northerly dry flow on Friday will help to warm temperatures up
into the mid to upper 80s in the valley with mainly 60s for the
mountains.

&&

.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)

A broad upper level trough will remain across the intermountain
West through much of the extended period. Weak shortwaves will
likely rotate through the trough, bringing chances of showers
mainly across the Sierra. The timing of these shortwaves isn`t
handled well right now, and so we`ve largely included slight
chance wording through most of the period. Even with the presence
of the upper trough, temperatures are expected to be near to above
normal. Breezy north winds may be possible across the Valley,
again dependent on timing of shortwave troughs.

Dang/JBB

&&

.AVIATION...

Mainly VFR conditions overnight and in the morning hours.
with winds less than 10 kts. There is a chance LCL to
areas of low clouds could form in the valley by morning.
MVFR to LCL IFR conditions still likely over the mountains in
scattered showers and thunderstorms Wednesday afternoon.

&&

.STO Watches/Warnings/Advisories...
None.
&&

$$


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