Area Forecast Discussion
Issued by NWS Sacramento, CA

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632
FXUS66 KSTO 302147
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
247 PM PDT THU JUN 30 2016


.SYNOPSIS...
Hot and mainly dry this week. A slight cooling trend starting
this weekend and continuing through the week. Isolated late day
thunderstorms possible over the Sierra Friday and Saturday.

&&

.DISCUSSION...
Afternoon temperatures are running similar compared to 24 hours
ago, as the Delta Breeze weakened during this morning. However,
the marine layer should deepen overnight, bringing some cooling
during the evening hours. Any shower activity that develops today
should remain mainly to the east and south of the Sierra crest.
Easterly flow could bring some patchy smoke toward the Auburn
area overnight. Friday highs are expected to be 5-10 degrees above
normal. Cooling trend begins Saturday into early next week, as an
upper trough along the Pacific Northwest moves inland.
Temperatures will remain near to slightly above normal during this
period. Expect Valley highs in the low to mid 90s, but the
northern Valley should remain in the upper 90s.

Model guidance suggests some monsoonal moisture moving northward
on Friday. Thus, there is a slight chance of late afternoon
thunderstorms Friday and Saturday over the Sierra. Otherwise,
expect dry conditions for the rest of interior northern
California.

&&

.EXTENDED DISCUSSION (Monday THROUGH Thursday)


A weak upper trough will persist over the Pacific Northwest into
extreme NorCal next week, resulting in dry weather and near
normal temperatures. Onshore, southwest winds may be breezy over
higher terrain with a standard Delta Breeze. Expect high
temperatures in the 90s across the Valley, with 70s and 80s over
the mountains.         JClapp

&&

.AVIATION...


VFR conditions the next 24 hours. Light W-SW flight level 10K MSL
winds with gusty terrain-driven surface winds over mountains while
the Delta Breeze will increase again this afternoon and evening.
JClapp

&&

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

$$



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