Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 291031
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
331 AM PDT Mon May 29 2017

.SYNOPSIS...
High pressure will continue to bring above normal temperatures
and dry weather to much of the area through Tuesday. Isolated
afternoon thunderstorms will occur each day near the southern
Sierra crest. A cold front will bring cooler temperatures to the
area on Wednesday with a chance of showers and thunderstorms over
the mountains. Gradual warming trend will return into next
weekend.

&&

.DISCUSSION...
Water vapor imagery indicating a bit more robust trough off the
coast than the models had been advertising. We have bumped up pops
across the Sierra and Kern County mountains. Guidance is still
indicating today to be the warmest day...despite cirrus deck and
increased onshore flow. We could see some cooler temperature
impacts across Merced County with breezy conditions through the
Pacheco Pass and cooler temps near Los Banos and along the west
side of Merced co.

The trough is expected to phase in with an approaching nrn stream
system Tuesday night and push through on Wednesday. More
significant cooling is expected on Wednesday to near or below
normal temps. Convection is possible today across the Sierra. We
could see some showers in Kern County as well. The trough will
hang around on Tuesday as another stronger front will push
through on Wednesday.

Zonal flow with a gradual warm up Thursday and Friday will give
way to a trough moving into the region Saturday and Sunday with
a minor cool down and possible increase in Sierra convection.
Timing and strength remains at low confidence right now. Kept it
dry with slightly cooling temps for next weekend.

&&

.AVIATION...
Areas of MVFR and Local IFR possible over the Sierra Nevada crest
due to mountain obscurations from isolated thunderstorms through 04z
Tue. Otherwise, VFR conditions are expected across the central CA
interior during the next 24 hours.

&&

.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...
NONE.

&&

$$

public...JDB
avn/fw...Durfee
synopsis...JDB

weather.gov/hanford



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