NATIONAL WEATHER SERVICE FORECAST DISCUSSION
Area Forecast Discussion
Issued by The National Weather Service
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000
FXUS66 KSTO 180951
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
247 AM PDT Mon Jun 18 2018

.SYNOPSIS...
Warm and dry weather returns this week.

&&

.DISCUSSION...
A few clouds linger along the southern Cascade/northern Sierra
crest and over the coast range, otherwise clear skies early this
morning. Current temperatures are milder across most of the region
compared to 24 hours ago and range from the mid to upper 30s in
the mountain valleys to the upper 50s to mid 60s across the
Central Valley.

Weakening cyclonic flow will linger today as the weekend low
moves toward the northern Rockies. Can`t rule out an isolated
late-day shower or thunderstorm near Mt. Lassen, but much of the
region will return to warm and dry weather today as highs are
expected to warm about 10 degrees from Sunday`s readings.

Upper ridge builds across the area Tuesday and Wednesday before
the next short-wave trough is forecast to dent the ridge on
Thursday. Temperatures are expected to be seasonably hot with
highs in the Central Valley forecast to range from the mid 90s to
around 100. The threat of showers and thunderstorms with
Thursday`s trough is expected to remain to the north along the
Oregon/California border.

&&

.EXTENDED DISCUSSION (Friday THROUGH Monday)
Dry and very warm weather is expected through the end of the week
as Pacific upper level ridging expands eastward into the region
and builds. Widespread triple digits are expected across the
Valley by Friday, with even hotter temperatures expected on
Saturday. This will bring the potential for moderate heat risk for
sensitive groups including the elderly and the very young for
Friday, potentially areas with areas of high risk on Saturday.
Breezy north winds will bring lower humidity levels and increasing
fire danger. Sunday may be slightly less hot, as a trough moving
through the Pacific Northwest flattens the ridge and shifts the
axis eastward. Cooler weather returns on Monday, with Valley highs
dropping to around 90. EK

&&

.AVIATION...
VFR conditions continue over the next 24 hours. Dry weather is
expected except for isolated showers or thunderstorms possible
over the Lassen Park area this afternoon. Winds at TAF sites will
generally less than 10kt. EK

&&

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

&&

$$
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