Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 222206

Area Forecast Discussion
National Weather Service Sacramento CA
306 PM PDT Mon Jul 22 2019

Hot temperatures this week with widespread Valley temperatures
near 100 degrees. There is a slight chance of thunderstorms over
the Central Sierra late this week, though they will likely remain
east and south of our forecast area.


Another hot day is expected today for interior NorCal as the area
remains between strong high pressure centered over the Desert
Southwest and low pressure off the PacNW. Current temperatures
are around 5 to 8 degrees warmer than this time yesterday. Valley
temperatures will peak right around the century mark.

The weak trough pushing through the PacNW tomorrow will brush
NorCal. This will increase onshore flow and create breezier winds,
keeping temperatures a few degrees lower than today. There are no
major fire weather concerns with these winds as they will be from
the south to east and gusts will only be around 15 to 20 mph.

Ensemble models continue to expand the monsoon high slightly
northwestward Wednesday and Thursday, though they have
continually backed off on the extend of the expansion. Flow will
become southwest over the forecast area, bringing some monsoon
moisture around the high. There is a slight chance of Sierra
thunderstorms over the far southwest corner of our forecast area,
though they are likely to remain east and south of our area.
Temperatures will warm a few degrees back to near 100 degrees
across the Valley. A slight Delta Breeze is expected to continue
each night, allowing overnight temperatures in the Valley to
mostly remain in the 60s. HEC



High pressure over the Desert Southwest will continue to
influence our region as it slowly edges westward. Southwest flow
aloft should mostly keep monsoon moisture east of the forecast
area. However, there is a very slight chance of precipitation in
eastern Tuolumne county on Friday.

Warm and dry conditions are expected across the region through
next week. Temperatures are forecast to be around normal for this
time of year. This weekend could be a few degrees above the
climatological average with several locations expected to reach
into triple digit temperatures. SLL



VFR conditions next 24 hours. Local southwest wind gusts 15-25 kts
near KSUU, otherwise sustained winds less than 15 kts. Southerly
winds increase tomorrow afternoon in the north valley with gusts
up to 20 knots possible.



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