Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 150931

Area Forecast Discussion
National Weather Service Reno NV
231 AM PDT Fri Sep 15 2017


Today will be the coolest day of the past three months as dry
north flow prevails, followed by a modest warmup for the weekend.
A stronger cold front will bring increased winds Monday followed
by below average temperatures for much of next week and a chance
for showers. Light snow is possible in higher elevations, while
low temperatures may dip to near freezing in some lower valleys.



A few leftover showers across parts of western NV should dissipate
before daybreak as the upper level jet streak providing the
forcing for this activity exits to the south and east. Yesterday
evening, smoke aloft from large fires in northwest CA produced
hazy conditions. Some haze may still be present this morning, but
with north flow dominating today the haze should disperse, with
wind trajectories keeping any additional smoke from these fires
well west of the Sierra later today.

Dry weather will prevail today through the weekend, with periods
of mid and high level cloud cover Saturday as a weak shortwave
trough passes through. Daytime temperatures will be at their
coolest levels since mid-June with highs today mainly in the
lower-mid 70s for lower elevations and 60s near the Sierra.
Temperatures this weekend will rebound to near average as flow
aloft returns to a milder westerly direction, with some increase
in winds by Sunday afternoon (gusts 30-35 mph mainly north of
US-50). Temperatures early Saturday morning are likely to briefly
(generally less than 2 hours) dip into the mid to upper 30s for
typically colder valleys in western NV and northeast CA, so very
sensitive vegetation could be affected. MJD

.LONG TERM...Week of September 18th...

Cooler and unsettled pattern will develop across the west for next
week. This will be caused by low pressure setting up over the
Canadian Rockies with 2 or 3 systems rotating through the Sierra and
western Nevada. Expect periods of gusty winds with each passing
system, autumn like temperatures and a threat for rain and mountain
snow. Good idea to have a plan in place to protect plants and
irrigation systems sensitive to frost and/or freezing conditions as
morning lows will likely dip into the 30s across the NV valleys and
below freezing in the Sierra Valleys.

First system will impact the region on Monday with wind the primary
impact. Peak gusts in the 35-45 mph range are a good possibility in
the lower elevations which may bring a threat for critical fire
weather conditions across the deserts of western NV. A few showers
may occur across Lassen and northern Washoe counties.

Additional systems for Wednesday-early Thursday and possibly Friday
will bring gusty winds and perhaps a better chance for showers. Snow
level could dip down below 7000 feet at times, which may leave a
light accumulation of snow on mountain peaks. Brong



A few showers and a thunderstorm or two will continue through 12-14z
from north and east of Reno to KLOL-KNFL as low pressure tracks
across northern Nevada. Rest of today will feature dry conditions,
clear skies and light northeast to east winds.

Weekend will be warm and dry, though pattern will change for Monday
where gusty winds of 30-40 kts are possible with mountain
turbulence. Brong


.REV Watches/Warnings/Advisories...


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