Scientific Forecaster Discussion
fxus66 khnx 202333 aaa
Area forecast discussion...updated
National Weather Service Hanford California
433 PM PDT Tue Aug 20 2019
Update...updated air quality section.
Synopsis...below normal temperatures are expected across the
central California interior through Thursday. Temperatures will
increase through the end of the weekend, eventually exceeding the
century mark in the San Joaquin Valley and Kern County desert. Dry
weather will continue through the forecast period.
Discussion...an upper level trough will dig in across the region
through Thursday with continued below normal temperatures
expected. Very impressive storm system off the Pacific northwest coast is
gradually filling as it moves onshore into the Pacific northwest. Rain will
move in as far south as norcal with some increasing clouds into
cencal on Thursday.
The trough will swing through by Friday morning as the epac ridge
will build in behind it. H500dm heights will continue to rise
through the weekend as the epac ridge noses into the West Coast of
the US. The ridge will hold in place with dry conditions and
above normal temperatures through the early part of next week. A
weak low center will develop off socal coast and slightly weaken
the ridge from the south on Tuesday. However, temperatures will
remain steady, just above normal.
Aviation...VFR conditions can be expected over the central
California interior during the next 24 hours.
Air quality issues...
on Wednesday August 21 2019... unhealthy for sensitive groups in
Fresno and Kern counties and Sequoia National Park and Forest.
Further information is available at valleyair.Org
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is high.
Certainty levels include low...medium...and high. Please visit
www.Weather.Gov/hnx/certainty.Html for additional information
an/or to provide feedback.