Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 222304
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
304 PM PST Sun Jan 22 2017
.SYNOPSIS...A strong Pacific storm will continue to affect central
CA with strong winds,rain and mountain snow tonight and Monday. A
drying trend will begin on Tuesday with a continuation of dry
weather for the remainder of next week.
Widespread precipitation and strong winds affected the central CA
interior ahead of a cold. The strongest winds occurred at the
south end of the San Joaquin Valley around the Grapevine, Taft to
Bakersfield area. Models prog the strong wind potential decreasing
during the late evening after a cold front passage. Models also
show increasing instability towards the Merced area as cold air
aloft arrives behind the front. Showers and isolated thunderstorms
will be possible during late afternoon especially over parts of
the Central Valley and adjacent foothills. Mid level winds from
the SW to W will remain strong for favorable orographic lift over
the sierra for a continued threat of heavy precipitation through
tonight. Snow levels should lower tonight first towards yosemite
this evening then towards the Tehachapis after midnight. An inch
or two of snow will be possible at pass level in the Tehachapi
mountain passes by Monday morning. Model prog an unstable
atmosphere Monday for a threat of thunderstorms over much of the
district in the afternoon.
By Monday night and Tuesday, the very deep and strong area of low
pressure currently located off the Oregon and Washington coast
will move down the coast later Monday and Tuesday and then move
east of the area by later Tuesday. This will bring precipitation
to an end. From Wednesday through the upcoming weekend things look
dry as high pressure ridging is projected to build over the West.
In the San Joaquin Valley, areas of MVFR in rain and low clouds over
region. Wind gusts over 35KT possible thru 06Z Monday. In the
southern Sierra Nevada and adjacent foothills, mountain obscuring
IFR in low clouds and precipitation prevailing with areas of LIFR.
Strong southwest winds in excess of 35KT over the ridge tops. In the
Tehachapi Mountains and valley facing slopes, areas of mountain
obscuring IFR and local LIFR in low clouds and precipitation. Strong
gusty southerly winds in excess of 35KT over the ridge tops. Winds
over 50KT possible near the Grapevine. Otherwise, VFR conditions
will prevail during the next 24 hours.
.AIR QUALITY ISSUES...
The level of certainty for days 1 and 2 is medium.
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.
Flash Flood Watch until 10 PM PST this evening CAZ093>097.
Winter Storm Warning until 10 AM PST Monday CAZ096-097.
Winter Storm Warning until 10 AM PST Monday CAZ095.
Wind Advisory until 10 PM PST this evening CAZ089>093.