Scientific Forecaster Discussion
fxus66 khnx 180944
Area forecast discussion
National Weather Service Hanford California
244 am PDT Wed Sep 18 2019
another trough of low pressure will impact the the region
Wednesday and Thursday with breezy to gusty winds. Light
precipitation will be possible in the higher elevations of the
Sierra especially near Yosemite on Wednesday afternoon through
Thursday. Below normal temperatures will continue through at
least Thursday. A warming trend will begin Friday.
another trough of low pressure and an associated cold front will
move through south through California today, reaching central
California this afternoon and evening. This system will not bring
much precipitation with it for the cwfa, but what does fall will
mainly from Merced to Yosemite late this afternoon and evening and
will be very light. A few light showers are possible Thursday over
the Sierra Fresno County northward. A dusting of snow is possible
at the higher elevations of the Sierra.
Winds with this system will become gusty this afternoon and
evening in the San Joaquin Valley, the Kern County mountains and
desert areas, and over the crest of the Sierra. However, the
winds will not be as strong as they were on Monday due to less of
a temperature difference across the front. Gusts may reach 40 to
45 mph in some areas of the Kern County mountains this evening as
the trough moves through. Some blowing dust is also possible as
this system moves through. At this time, no wind advisories are
By Friday, ridging will begin moving into the region with a
warming trend as we go into the weekend. However, temperatures
will only warm to right around normal levels, which for Fresno
is currently 91 degrees. Sunday looks to be the warmest day, as
another Pacific northwest trough will move southward into the
region by Monday. At that point, models have divergent solutions
with where the trough will go and whether or not it closes off
and hangs around over Southern California for a few days. Thus,
confidence beyond next Monday is low and have opted to keep the
forecast dry with near normal temperatures until we have a better
idea on how this system will evolve.
VFR conditions will prevail through the next 24 hours except areas
of MVFR in the mountain areas after 00z Thursday.
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.Html for additional information
an/or to provide feedback.