Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 031125
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
325 AM PST Sat Dec 3 2016
.SYNOPSIS...Expect mainly dry conditions and seasonably cool
temperatures for the next several days. Another low pressure
system could bring a chance of precipitation, mainly Fresno and
north, by Friday.
.DISCUSSION...Temperatures tonight have generally remained steady
and a few degrees above freezing for the last 3-4 hours, or in
the mid to upper-30s, in the San Joaquin Valley. The coolest
locations in this area are expected to fall to around freezing or
just below by daybreak. Some patchy fog has been reported, though
it appears to be mainly around KHJO at this time. Visibility is
generally around 2-3 miles or better, except around a 1/4 mile at
KHJO. As temperatures are relatively close to the dewpoint, more
locations in the SJ Valley may observe patchy fog.
Expect high temperatures to reach around average or slightly above
for the remainder of this weekend as high pressure builds along
the coast before another low pressure system brushes by the Sierra
around Yosemite to Kings Canyon. The upper-level low is expected
to pass mainly over the Great Basin and mainly east of the Sierra,
or move as a inside-slider. Sufficient moisture and dynamics
could bring a slight chance of showers to some of the higher
elevations of the Sierra. In addition, the associated trough
could bring another brief episode of cooler temperatures and lower
dewpoints during the middle part of the week with a northerly
flow aloft. However, am less confident of widespread freezing
overnight temperatures during the middle of next week in the SJ
Valley and lower elevations, as models have been trending the flow
aloft more from the northwest with high pressure ridging more
likely to develop along the coast during Wednesday and moving
inland by Thursday.
Another low pressure system is expected by late Thursday into
Friday. Models are in agreement with this system bringing some
subtropical moisture from the Pacific, though likely over northern
CA and the Pacific NW. Although, there are some differences among
the model solutions in terms of how far south this moisture
travels. For now, this warrants at least a slight chance of
showers, mainly Fresno County and northward, though am moderately
confident at best.
Areas of MVFR visibilities due to haze and mist across the San
Joaquin Valley, with mountain obscuration possible through 17z.
Otherwise,VFR conditions can be expected across the central
California interior during the next 24 hours.
.AIR QUALITY ISSUES...
On Saturday December 3 2016... Fireplace/Wood Stove Burning
Status is: No Burning Unless Registered in Fresno... Kern and
Tulare Counties. Further information is available at Valleyair.org
The level of certainty for days 1 and 2 is medium.
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.
Freeze Warning until 9 AM PST this morning CAZ089>092.