Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Joaquin Valley - Hanford California
418 am PDT Sat Aug 29 2015
temperatures will cool to slightly below average this weekend...and
locally breezy conditions are expected as a low pressure system
impacts the region. Temperatures should remain near average
during next week as onshore flow continues. No precipitation is
expected through the period.
after another scorching day yesterday across central California
under the backside of a retreating high pressure ridge...a change
in the weather is on the way. A developing trough over the
northeast Pacific is beginning to lower heights and thicknesses
over the region. Onshore surface pressure gradients are increasing
and the layer of ocean cooled air along the coast is deepening
dramatically. Moderate wind gusts are already being seen through
and below mountain passes. These winds are expected to bring the
cooler air into the San Joaquin Valley today...providing
significantly cooler temperatures...especially over northern
portions of our valley zones.
Cooling will be a little less dramatic in the South Valley as
well as areas outside the San Joaquin Valley until tomorrow as the
upper trough continues to track inland. Sunday temperatures will
be around 6-12 degrees below climatology across our area. The gusty
winds will also produce areas of blowing dust today and Sunday.
There is enough associated moisture for some middle/high cloudiness
with the passing trough...and models suggest some upslope
cloudiness in the Kern County mountains by tonight...but
precipitation chances remain at or near zero.
Dry conditions with temperatures near or slightly below normal
are prognosticated to continue through the end of next week as model
consensus continues in maintaining a troughy pattern over the West
Coast through the period.
areas of MVFR and local IFR visibilities can be expected in the
foothills and higher elevations of the southern Sierra Nevada due to
smoke. Otherwise...VFR conditions will prevail across 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 high.
This information is provided as part of a trial project conducted
by the National Weather Service San Joaquin Valley - Hanford.
Certainty levels include low...medium...and high. Please visit
www.Weather.Gov/hnx/certainty.Php /all lower case/ for additional
information and/or to provide feedback.
site date hi_max:year lo_max:year hi_min:year lo_min:year
Kfat 08-29 109:1915 79:2010 76:1915 52:1895
kfat 08-30 109:1988 80:1957 81:2007 49:1966
kfat 08-31 107:2007 69:1964 75:2007 50:1887
Kbfl 08-29 109:1915 77:1911 85:1909 45:1903
kbfl 08-30 108:1988 80:1957 85:1909 45:1912
kbfl 08-31 111:1967 79:1966 80:2007 45:1912