Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 172343
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
343 PM PST Fri Feb 17 2017
.SYNOPSIS...Unsettled weather will continue across central
California through at least the middle of next week.
A storm system off the coast continues to affect central CA with
rain, high elevation snow and high winds. Satellite images show
a moisture band of high precipitable water stretching from the
Channel Islands northward through the San Joaquin Valley. The
heaviest rain is falling in the south facing slopes of the
Tehachapi Mountains due strong south winds. The Vandenberg
Sounding shows South wind at 60kt around 5kft and numerous reports
of high winds have been reported especially towards the Tehachapi
mountains and along the coastal mountains. Models prog the high
wind potential decreasing during the evening. Heavy snow should
continue over the Sierra with rising snow levels. No changes
anticipated at the moment for the current watches and warnings.
The moderate to heavy rain should continue over the Kern county
mountains...especially the south facing slopes into the evening.
Thunderstorms will be possible this afternoon into the early
evening hours...especially along the west side of the San Joaquin
Models prog the upper low pushing onshore tonight and over the
SJV early Saturday morning...with scattered showers across the
area Saturday into Sunday.
Another upper low will approach the Pacific Northwest coastline
Sunday night into Monday morning...bringing another round of
widespread precipitation to central California Monday into
Tuesday morning. Unsettled weather remains in the area through at
least next Friday. There will be breaks in the weather during this
time frame...we will continue to nail down timing over the weekend
into early next week.
The main concern of the forecast will be over the next 12
hours...with extremely strong winds and flash flooding especially
over the mountains below 7000 feet. Please continue to maintain
weather awareness today and stay safe.
.AVIATION...IFR conditions will prevail over the mountains due
to precipitation, low ceilings and mountain obscurations. Local
MVFR conditions can be expected in the Sierra foothills in
episodes of heavy rain during the next 24 hours. Additionally,
strong winds gusting over 35 knots will occur in the northern
San Joaquin Valley and through and below the mountain passes of Kern
County as well as the south end and west side of the San Joaquin
Valley through 03z Saturday. VFR conditions can be expected
elsewhere over the central California interior during the next
.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 through late tonight CAZ093>099.
Wind Advisory until 7 PM PST this evening CAZ089>092.
High Wind Warning until 7 PM PST this evening CAZ095.
Winter Storm Warning until 4 AM PST Saturday ABOVE 7000 FEET FOR