607
FXUS66 KSTO 212015
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
115 PM PDT Tue May 21 2024

.SYNOPSIS...
Warm and dry weather continues. Breezy north winds Thursday.
Minor cooling this weekend before warming returns next week.

&&

.DISCUSSION...
Current GOES-West visible satellite imagery depicts abundant
sunshine being observed across interior northern California on
this Tuesday afternoon. Temperatures are currently trending
approximately 3 to 8 degrees warmer than this time yesterday,
valid at 1 PM PDT. The north to east winds have decreased across
the area for the most part (compared to yesterday) with gusts of
around 15 to 25 mph now being observed this afternoon, and
continued decrease is expected through the day.

A system passes to the north late Wednesday into Thursday
bringing some slightly cooler temperatures later in the week, as
well as another round of locally breezy northerly winds behind it
on Thursday. Strongest winds are expected in the Sacramento Valley
where gusts of 20 to 35 mph are forecast. Any precipitation with
this looks to be well to the north and east of our forecast area.
By the end of the week and into the weekend, a trough with
northwest flow will be bringing temperatures down slightly.
Guidance is suggesting a slight chance for a shower or
thunderstorm over the Sierra Crest south of Highway 88 Friday
afternoon, but otherwise dry conditions prevail. Mainly Minor Heat
Risk continues in the Valley and into the lower foothills the
rest of this week, with Little to No Risk in the upper foothills
and mountains.

&&

.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)...
The aforementioned trough will bring temperatures down to near or
slightly below the climatological normal for late May, with the
coolest temperatures expected on Saturday where Heat Risk is at
Little to None for most of interior northern California. High
pressure then begins to build back in Sunday and into next week,
bringing gradual day to day warming and Minor Heat Risk to the
Valley and foothills. Overall quiet and warm weather is in store
for Memorial Day Weekend with periods of locally breezy onshore
flow.

&&

.AVIATION...
VFR conditions with surface winds under 12 kts over the next 24
hours. Periods of north winds 10-15 kts across the Northern
Sacramento Valley and western portions of the Valley after 18z
Wed.

&&

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

$$