Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 011214
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
514 AM PDT SAT OCT 1 2016
Cooling trend will continue through the weekend and into the start
of next week as a frontal system moves through the area. Winds will
be breezy to locally windy through early next week possibly picking
up loose dirt and dust at times. Light showers and high elevation
snow expected Sunday afternoon through Monday morning over the
northern half of the forecast area.
Preliminary frontal passage beginning last evening, from an
accompanied storm system centered just west of the Pacific
Northwest coast as of 11z, brought gusty winds and some blowing
dust to the northern and western parts of the CWA as well as the
Kern County Mountain/desert areas. Wind speeds gusted up to
nearly 40 mph near Pachecho Pass area and near Indian Wells
Canyon. The highest wind gusts in the San Joaquin Valley were
between 20 and 25 mph. Visibilities were slightly reduced in many
areas due to the dust being kicked up by the winds. Winds will
continue to decrease across the SJV through the morning. Later
this afternoon winds will become gusty for the Kern County Desert
areas, blowing sand/dust will be possible with the strongest gusts
which are expected to peak around 35 to 40 mph, as the storm
system moves further south into central California.
Cooling temperatures and winds look to be the main impact with
this storm system as moisture is limited. Snow levels will plummet
to around the 6000 foot level by Monday which will keep
temperatures much below normal through the beginning of next
week. High temperatures will only reach the low 70s in many areas
of the SJV by Sunday and Monday. Some snow showers are expected
across the higher levels of the Sierra, especially near the
Yosemite National Park area late in the weekend. Hikers and
campers need to make sure they are properly prepared for winter-
like conditions in these areas. Snow amounts will be on the light
side with the highest amounts around the 2 inch mark.
Thunderstorms will be possible in the northern parts of the CWA on
Sunday afternoon and evening due to the colder nature of this
system with 500 mb heights around 565 dm over the region by
Sunday. This fact will create plenty of vertical instability and
with close proximity to the low, synoptic lifting will also be
available. However, the limiting factor will be the available
moisture, with this system being relatively moisture starved, fuel
for thunderstorms will be minimized. The trough will begin to move
eastward out of the region by Monday afternoon. A dry and cool
northwesterly flow will be left in the wake of the system through
Wednesday, which will be followed by a gradual warming trend as
weak ridging returns to the region by Thursday through the
beginning of next week.
VFR conditions will prevail over the central California interior
during the next 24 hours.
.AIR QUALITY ISSUES...
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.php for additional information
an/or to provide feedback.