Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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831
FXUS66 KHNX 211300
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
500 AM PST Wed Feb 21 2018

.SYNOPSIS...
Current temperatures across the SJV this morning are running about
5 to 10 degrees warmer than 24 hours ago. Many locations are
reporting just above freezing with a few locations at or just
below 32 degrees. Mid to upper level clouds moving through last
night was just enough of a blanket to keep temps warmer last
evening and now with an area of clearing moving in some
radiational cooling is now allowed to occur. However, it looks
like many area farmers may have been spared from a second
consecutive night of sub-freezing temperatures. Hopefully, that
fact will minimize the potential damages that may have happened
otherwise.

A fairly active and by active I just mean in terms of system
passages, because moisture support has been severely limited
keeping the systems that do move through on the low end of the
precipitation spectrum. The next shortwave that is currently in
northern California and moving south will be another wave that
appears dead on arrival for central California. Breezy to gusty
winds and continued cooler temperatures is the main items on the
menu once again for later today into tomorrow morning. Low
temperatures tomorrow should be kept higher due to the mixing
available with this system. By early Thursday morning northerly
flow will continue over the region keeping Thursday high
temperatures below normal while another quick moving system is
progged to move into the central California region beginning
Thursday night into Friday. But... this system again looks like
moisture support will be fairly limited, however with this system
there is a better chance of a little more precipitation than what
we will get with tonight`s system, and keep in mind most of that
will happen in the higher elevations of the Sierra. A few light
showers will not be out of the question as that system moves
through the area, but that would be the most that I expect.

Weak ridging will move into the region over the weekend and
moderate temperatures slightly into early next week. Another
system, which at this time looks more potent than these next
couple of systems and could bring us some precipitation worth
mentioning, and much colder temperatures will move into the area
beginning Monday night into Tuesday. The details are a bit
sketchy at this time but I have to say I am a bit excited about
this one, as there may be a bit of moisture support with this
system. It will also be a cold system and we may be flirting once
again with the possibility of sub-freezing temps in the SJV. More
info will be forth coming as we get closer. Let`s cross our
fingers!

&&

.DISCUSSION...
&&

.AVIATION...
VFR conditions will prevail across the Central CA Interior during
the next 18 to 24 hours. Possible MVFR ceilings from an approaching
storm after 12Z Thursday.

&&

.AIR QUALITY ISSUES...
None.

&&

.CERTAINTY...

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.

&&

.HNX Watches/Warnings/Advisories...
Freeze Warning until 8 AM PST this morning CAZ089>094.

&&

$$

public...Andersen
avn/fw...Molina
synopsis...Andersen

weather.gov/hanford



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