Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 260407
Area Forecast Discussion
National Weather Service Sacramento CA
907 PM PDT Tue Oct 25 2016
Wet and unsettled weather continues this week, with a brief break
Wednesday, then continues into early next week as several weather
systems move across the area.
The system has been lifting northward this evening with showers
persisting over the coastal range and Shasta County. Temperatures
have mainly been running a little warmer than last night mainly
due to the cloud cover and high dewpoints throughout the area. A
few patches of fog may develop by morning.
On Wednesday brief ridging will occur over the area to bring us a
dry day with the exception of chances of showers continuing over
the coastal range and Western Shasta County. Temperatures should
warm around 5 degrees for most locations. The next system will
move into the area on Thursday spreading rain into the region from
the southwest. This system should bring greater amounts of rain
for the valley. Snow levels will still be very high and a non
factor for travel over the crest of the Sierra Nevada.
The main part of this system will move through Thursday night and
Friday morning. Showers should persist for most areas Friday
afternoon as another low pressure area sets up off the northwest
coast and may be close enough to help bring some enhancement of
showers from the lingering moisture of the system that will be
exiting the area.
.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)
Active weather pattern will continue for much of the extended
period. Models in general agreement altho vary just a bit in
timing of each wave and precip amounts. Friday`s wave will begin
to shift east on Saturday with a few showers lingering across
higher terrain and portions of the area. Another wave will move
onshore from the Pacific on Sunday into early Monday. This wave
could be fairly wet, with snow levels lowering below major pass
levels during the day. This will be something to watch going
forward as it may impact travel over the mountains Sunday. Brunt
of storm will shift east on Monday with showers lingering across
higher terrain. Looks like a decent probability that active
pattern will continue past Monday. GFS suggests additional systems
every 1-2 days between brief ridging while ECMWF not quite as
robust. Below normal temperatures will rule through the period.
Mainly VFR/MVFR conditions across northern CA. Showers will
continue to diminish tonight along the coastal range. Patchy fog
may develop along portions of the Valley early Wednesday morning.