Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 272110
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
210 PM PDT Thu Apr 27 2017
.SYNOPSIS...Breezy conditions will continue across the region
through Friday. Lighter winds, warming temperatures and dry
weather will then prevail this weekend into early next week as
high pressure strengthens over the region.
.DISCUSSION...Cool and dry northwest flow prevailing over our
area at this time as central CA remains situated in between an
upper ridge centered near 135W and a broad upper trough over the
central CONUS. Shortwave energy pushing into the PAC NW and
dropping into the Great Basin is continuing to bring increased
northwest winds along with increased cloud cover to our area with
some upslope persisting over the south end of the San Joaquin
Valley and the foothills and valley facing slopes of the mountains
in in Tulare and Kern Counties. Wind gusts at some locations in
the Kern County Mountains and Deserts are expected to exceed 45
mph this afternoon and this evening before decreasing overnight so
a Wind Advisory continues for these areas through 500 am Friday.
Meanwhile, drier air pushing into our area will allow for the
upslope low clouds to slowly erode this evening and skies will be
mainly clear across our area on Friday as the offshore ridge
becomes more amplified and pushes the stream of shortwave impulses
further northward. Breezy conditions will still prevail across
portions of our area on Friday as surface p-grads remain fairly
strong, most noticeably in the San Joaquin Valley; but are
expected to remain below advisory levels. Temperatures will remain
on the cool side for late April.
The 18Z WRF is indicating the ridge will slowly shift east over
the weekend which will bring rises in heights and thicknesses
along with relaxing p-grads. Temperatures will rise to near
seasonal normals by Saturday and to above normal by Sunday as a
result. Winds will diminish on Satruday and remain fairly light
for the remainder of the weekend.
The medium range models are in fairly good agreement in building
the upper ridge inland across the western CONUS Monday through
Thursday which will provide for a period of dry conditions and
above normal temperatures across our area.
.AVIATION...Local MVFR and isolated mountain obscuring IFR in low
clouds in the Southern Sierra Nevada until 06Z Friday and in the
Kern County Mountains until 18Z Friday. Otherwise, VFR conditions
will prevail across the central CA interior along with gusty to
breezy northerly winds during the next 24 hours.
.AIR QUALITY ISSUES...None.
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.
Wind Advisory until 5 AM PDT Friday CAZ095-098-099.