Manton, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

650
FXUS66 KSTO 122019
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
119 PM PDT Mon Aug 12 2024

.SYNOPSIS...
Cooler temperatures and increasing humidity, with periods of
breezy onshore winds this week.

&&

.Discussion...
Current GOES-West visible satellite imagery shows mostly sunny
skies across interior northern California with the exception of
some increasing cumulus and mid level clouds early on this Monday
afternoon. For much of interior NorCal, current temperature
observations are trending approximately 3 to 8 degrees cooler
than this time yesterday afternoon, valid at 130 PM PDT. Breezy
onshore winds are being observed across much of the area with
gusts generally around 15 to 25 mph.

A shortwave trough moving across the area today will bring
increased onshore flow, and chances for sprinkles or light
precipitation, or even an isolated thunderstorms (10-15%
probability) mainly to the higher elevations of the northern
mountains in Shasta County. Increased clouds and/or virga may be
observed elsewhere today but otherwise, generally dry conditions
continue. Breezy to gusty southwesterly winds are forecast for
this afternoon and into the overnight period, especially through
the Delta area and up in the mountains as the shortwave moves
across the area.

Periods of breezy onshore winds continue through the short term
forecast period. Temperatures on Tuesday will generally be in the
80s to low 90s in the Valley and foothills, with 60s to mid 80s
in the mountains, and mainly Minor HeatRisk. Slightly warmer
temperatures are expected Wednesday with a brief period of slightly
higher heights, however another shortwave looks to move through
late Wednesday into Thursday bringing temperatures back down
again. Overall, temperatures are forecast to remain near or below
the climatological normal this week.

&&

.EXTENDED DISCUSSION (Friday THROUGH Monday)...
Ensemble guidance and cluster analysis indicate that the
influence of upper level troughing will continue over the extended
forecast period. A longwave trough is expected to deepen off the
coast of the Pacific Northwest later in the week and over the
weekend. Increased humidity, and cooler than climatological normal
temperatures are expected as a result of this pattern. High
temperatures are expected to generally be in the 80s to low 90s
in the Valley and lower foothills, and mid 60s to upper 80s for
the upper foothills and mountains over this timeframe, with mainly
Minor HeatRisk each day. Additionally, periods of gusty onshore
winds are in the forecast, strongest through the Delta area and
over the Sierra Nevada as the trough deepens.

&&

.AVIATION...
VFR conditions over interior NorCal next 24 hrs except isolated
MVFR in HZ/FU possible at times in vicinity of fires.
Southwesterly (northwesterly in the northern San Joaquin Valley)
winds 10-15 kts with gusts 15-20 kts through 10z Tuesday.
Otherwise, sustained wind below 12 kts elsewhere. In and around
the Delta and over the Sierra, southwesterly surface winds
sustained 15-20 kts with gusts 20-30 kts through 18z Tues. Weaker,
but still breezy southwesterly winds expected tomorrow.

&&

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

&&

$$