Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 230931

Area Forecast Discussion
National Weather Service Reno NV
231 AM PDT Sat Sep 23 2017


A cold morning is expected today with some hard freezes in
outlying valleys. High pressure will build along the coast this
weekend and last into next week with a warming trend.



Aside from adding some patching freezing fog in the Sierra Valley
and around the Truckee airport, the forecast remains unchanged.

Skies have cleared while winds have fallen to near calm for most
locations in Sierra valleys and western Nevada. Recent cold air
advection and the conditions mentioned will allow for maximum
radiational cooling resulting in unseasonably cold morning lows
today. There is a hard freeze warning in effect for agricultural
areas for western Nevada and Lassen/Plumas Counties. These
conditions will also promote freezing fog formation for some
Sierra valleys.

Otherwise, winds remain north to northeast through the weekend
while high pressure begins to build along Pacific coast; Sierra
ridges will be more easterly with light breezes. The building
ridge will herald a warming trend with temperatures rising a
few degrees each day through the weekend into early next week.
Daily highs will rise from around 60 degrees for western Nevada
and the mid 50s for Sierra valleys today to around 70 degrees and
mid 60s, respectively, by Monday. Overnight lows remain quite cool
with temperatures below freezing for Sierra valleys and slightly
above freezing to around 40 degrees in western Nevada. Boyd

.LONG TERM...Tuesday onward...

Upper ridge begins expanding and strengthening over the west Tuesday
through the end of the work week. This will lead to warming
temperatures and highs are likely to be back in the 80s for western
Nevada valleys with 70s in Sierra valleys by Wednesday. A new
development in the past few model runs has been a weak wave moving
through the Pacific Northwest the end of the work week, flattening
the ridge a bit. This may bring light afternoon breezes, but
otherwise winds will generally be light. The wave will also limit
the warming trend, but the ridge is likely to once again take hold
over the west for the weekend with the latest guidance suggesting
further warming possible. Nights will be seasonably cool, and no
hard freezes are expected in agriculturally sensitive areas. -Dawn



Widespread VFR conditions are anticipated this weekend outside of
early morning FZFG in some Sierra valleys, including the Martis
Valley and KTRK. Skies will be clear to partly cloudy throughout
the weekend with Winds light and generally from the north to east
in direction. -Dawn


.REV Watches/Warnings/Advisories...
NV...Freeze Warning until 9 AM PDT this morning NVZ001-003-004.

CA...Freeze Warning until 9 AM PDT this morning CAZ071.



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