FXUS65 KREV 232034

Area Forecast Discussion
National Weather Service Reno NV
134 PM PDT Tue May 23 2017

Melting snow will continue to lead to minor flooding near creeks,
streams and rivers through the Memorial Day weekend and into most
of next week. Low pressure passing to the north will bring a
period of gusty winds on Wednesday with a few showers and
thunderstorms possible. The Memorial Day weekend looks warm and
dry with a few thunderstorms possible near the Sierra Crest on


Main story continues to be the minor flood impacts near creeks,
streams and rivers due to the melting Sierra snowpack.
Unregulated flows will rise today and Wednesday with a temporary
decrease in flows out of the higher elevation creeks and streams
as temperatures cool 5-10 degrees for Thursday and Friday.

Low pressure system will brush through northern Nevada Wednesday
and Thursday. This will lead to 30-40 mph wind gusts on Wednesday
afternoon and evening. Those heading out to the lakes tomorrow
will want to get up early as gusty winds may kick up just after
lunch time. Simulations are also showing the potential for a few
showers and thunderstorms Wednesday afternoon and Wednesday
night. Best chance appears to be in a narrow band from Lassen
County to Pershing County. A few showers may also pop up around
Mono and Mineral Counties.

Thursday and Friday will feel cooler, but temperatures will remain
near seasonal averages. Highs from the mid 70s to lower 80s in
the valleys with 60s to mid 70s in the Sierra. Brong

.LONG TERM...Saturday through Tuesday...

High pressure aloft is expected to develop over the Sierra and
western Great Basin for this weekend. This pattern should provide a
warm up to well above normal temperatures Saturday afternoon through
at least Monday. Expect afternoon temperatures this weekend in the
70s Sierra valleys and mid 80s to around 90 lower valleys. This
warming will once again accelerate flows on rivers and streams
flowing out of the Sierra, and various river advisories and warnings
will remain in effect.

There are indications the upper ridge axis will shift eastward early
next week. This shift could bring some increase of moisture to the
Sierra carried by southeast to south flow. It looks like only a
minor moisture surge, but enough to warrant a slight chance for
thunderstorms Monday and Tuesday afternoons over the Sierra from the
western Tahoe Basin south through Mono County. JCM



VFR conditions with light winds rest of today. A slight increase in
instability late this afternoon could be enough for cumulus
development and possibly one or two thunderstorms along the Sierra
crest of Mono County. As an upper trough drops down tomorrow, there
are slight chances for showers or thunderstorms across Mono-Mineral
Counties and also north of I-80 as a weak cold front drops south.
West flow will pick up tomorrow ahead of the front with ridge wind
gusts increasing to 50 kts and surface gusts generally 30-35 kts.
Some turbulence is possible along the lee of the Sierra. JCM



The Sierra snowpack will continue to melt over the next several
weeks. As we move into the peak of the melt season, impacts are
likely to become more prevalent for the eastern Sierra, the
Walker River system and upper portion of the Carson River system.

Creeks and streams are running fast and very cold, bringing the
risk of hypothermia for those without protective gear. Those with
plans to camp in the Sierra over the Memorial Day weekend should
be prepared to quickly leave creek side campsites. Hikers will
want to be cautious while trying to cross creeks and streams.


.REV Watches/Warnings/Advisories...
NV...Lake Wind Advisory from 1 PM to 10 PM PDT Wednesday NVZ004.

     Lake Wind Advisory from 1 PM to 10 PM PDT Wednesday NVZ002.

     Lake Wind Advisory from 1 PM to 10 PM PDT Wednesday for Washoe
     Lake in NVZ003.

CA...Lake Wind Advisory from 1 PM to 10 PM PDT Wednesday CAZ072.



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