Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 272140
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
240 PM PDT Thu Jul 27 2017

.SYNOPSIS...

Thunderstorm coverage will be less this afternoon and Friday with
only isolated storms possible, especially in the Sierra south of
Highway 50. A few thunderstorms will remain possible over the
weekend and into next week with very isolate coverage expected.
Near average high temperatures today will rise to around 10
degrees above average by the end of the weekend.


&&

.Short Term...

Ridge of high pressure building over the desert southwest will
continue to bring above average temperatures with chances for
thunderstorms each afternoon. A weak area of low pressure off the
coast through tomorrow, and a departing jet streak, will continue
to allow enough instability for thunderstorms to form along the
eastern Sierra in the afternoon and move into western Nevada south
of I-80.

Friday night an upper level wave may combine with the instability
from the jet streak to allow thunderstorms to continue overnight in
the Nevada Basin and Range. Instability and forcing don`t seem
great but we could see a storm or two able to sustain overnight.
Saturday we could see storms make it slightly farther north, but
probably only to Alpine County spreading into western Nevada south
of I-80.

As the ridge builds in temperatures will climb back to the upper
90s by the weekend with generally light afternoon breezes. -Zach


.Long Term...Sunday and beyond...

By Sunday, storm coverage should be contained mainly in southern
Mono and Mineral counties as drier air is now forecast over the
region. Some upper level instability remains Sunday night but
forcing from the upper level wave moving through the area is not
currently well timed for nocturnal storms.

Over the weekend and into early next week temperatures will
return to around triple digits in the valleys. This will extend
our new record of consecutive days above 90 degrees through the
foreseeable future. Today should make the streak 42 days of Reno
high temperatures above 90 degrees (The previous record was 35
days).

Thunderstorms for the late weekend and into early next week are
looking less impressive then a few days ago. Recent models
simulations now allow the ridge of high pressure to build more
directly over Nevada and don`t allow tropical moisture from
Hillary or Irwin into the region. -Zach

&&

.AVIATION...

Isolated storms will be possible in Mono and Mineral counties
in the late afternoon. Storms that do form today are expected to
form east of KMMH and are unlikely (10% chance) to directly impact
the airport. On Friday storms are expected to spread a little
north and east in coverage, potentially making it into Alpine
County and western Nevada south of I-80. Elsewhere, expect VFR
conditions with light afternoon breezes. -Zach


&&

.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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