Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 080954
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
154 AM PST Fri Dec 8 2017

.SYNOPSIS...

High pressure will bring dry conditions with valley inversions,
cold nights and light winds for the next 10 days. Localized air
quality issues are possible along the Sierra Front.

&&

.SHORT TERM...

No major changes to previous thinking. The next few days are going
to be about as quiet as they get as upper level ridge sits atop
the Sierra and western NV. Valleys will be slow to warm under
strong inversions with cold overnight temperatures. Air stagnation
due to limited mixing and light winds will promote hazy skies and
potential air quality issues, especially near the Sierra Front
around urbanized areas. For mountains, temperatures will be quite
mild with less diurnal fluctuation. Overall winds will remain
light with the gradient supporting an east to northeast general
flow. Hohmann

.LONG TERM...Monday onward...

Little change is expected in the overall weather pattern through
next week as high pressure remains in control of the region.
Inversions will keep afternoon temperatures near average for the
lower valleys, with the Sierra around 5-8 degrees above average.
Nights will remain cold (a bit below average) with the dry air mass,
light winds and little to no cloud cover. Some haze is likely to
continue for the Reno-Sparks-Carson City area, especially below 5000
feet, with periodic degradation of air quality possible.

As a minor note, moderate east ridge winds may return to the Sierra
Wednesday through Thursday as a weak upper disturbance drops south
across the Rockies, nudging the ridge axis back to the Oregon and
northern CA coast.

Looking beyond mid-December, the persistent ridge over the west may
finally weaken with a few of the longer range ensemble members
trying to bring precip back to CA/NV, but overall there isn`t a
definite transition to a wetter pattern showing up at this time. MJD

&&

.AVIATION...

VFR with light winds into next week with high pressure overhead.
Some haze around KRNO-KCXP is expected, but it should not be a
significant issue other than some minor reductions in slantwise
visibility. MJD

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

$$

For more information from the National Weather Service visit...
http://weather.gov/reno



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