FXUS66 KSTO 282223
AFDSTO
Area Forecast Discussion
National Weather Service Sacramento CA
223 PM PST Sat Nov 28 2020
SYNOPSIS...
Dry conditions with mild afternoons and cool nights are forecast
through most of next week. Possible breezy conditions are
expected around Tuesday-Wednesday.
.DISCUSSION
...
Dry and mild with cool nighttime temperatures into Monday with
patchy to areas of frost each night and generally light winds.
Thermal belt locations morning lows will warm each of the next
several nights. A weak system will pass through the region on
Monday but other than bringing us some high clouds ahead of the
front and maybe a some cumulus clouds over the mountains,
precipitation looks to stay north of Shasta County. Behind the
front Monday night into Tuesday north to northeast flow will set
up. Winds should stay up enough over the north and westside of the
valley to help warm the overnight lows. Temperatures will remain
warmer than normal during the day with the north and some spots
on the westside of the valley noticeably warmer than the rest of
the valley. Winds do not look that strong at this time but the
strongest winds will be over the north and westside of the valley
and through favored passes and northeast to southwest oriented
canyons and ridges for the mountains and foothills.
.EXTENDED DISCUSSION
(Wednesday THROUGH Saturday)...
Cluster analysis is in very good agreement we are likely to have
an amplified ridge over the West Coast throughout the extended
forecast period. This will mean dry and quiet weather for Northern
California. Forecast high temperatures are expected to be
anywhere from 5 to 15 degrees above average for this time of year.
It should be noted however, this high pressure pattern will also
yield cool, slightly below average lows for the Valley with
widespread 30s expected each morning. Locations along the thermal
belts will stay a bit warmer due to the capping inversion in place.
Low temperatures for those areas will be closer to climatological
averages. Some of these foothill locations will actually see lows
5 to 10 degrees above average for this time of year.
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