Scientific Forecaster Discussion
Area forecast discussion
National Weather Service San Joaquin Valley - Hanford California
540 PM PDT Tuesday Sep 2 2014
updated air quality section.
Synopsis... a little cooler Wednesday...then mostly clear skies and
steady temperatures for the remainder of this week while a
dry...westerly flow prevails over the region.
Warm and dry conditions across central California due to a
large subtropical ridge over the southwest. Temperatures running
1-5 degrees warmer in the valley and desert with little change
over the mountains. Warmer locations in the valley and lower
foothills will likely report triple digit highs today. Satellite
images show a stable and dry airmass over California...a closed
upper low well off the ncal coast and a short wave trough moving
onshore over the Pacific northwest. The ridge will start to weaken
Wednesday as the trough moves over the pacnw. This should start a
cooling trend and bring temperatures down to normal levels for
the forecast period. Some weak upper energy will hang back
Thursday over ncal as the short wave moves towards the north rockies.
Models show the energy merging with the closed low off ncal on
Friday. This will form a Rex block pattern along the epac for the
weekend. The pattern will be slow moving with the low drifting
south along the California coast. The low will maintain a dry SW
aloft over central California through the weekend. While at lower
levels a stronger onshore wind flow will likely enhance the
cooling into the interior with a deeper marine layer along the
VFR conditions will prevail across the central California interior
during the next 24 hours.
Air quality issues...
on Wednesday September 3 2014... unhealthy for sensitive groups in
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 medium.
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 09-02 108:1955 76:2000 77:1998 48:1964
kfat 09-03 111:1955 71:1912 77:2003 52:1964
kfat 09-04 107:1988 74:1912 75:1998 51:1912
Kbfl 09-02 110:1955 77:1946 78:1998 50:1913
kbfl 09-03 112:1955 78:1985 78:1998 50:1913
kbfl 09-04 109:1988 77:1936 77:1950 49:1915