Area Forecast Discussion
Issued by NWS Reno, NV

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076
FXUS65 KREV 262044
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
144 PM PDT Mon Jun 26 2017

.SYNOPSIS...

Gusty winds and low humidities will produce critical fire weather
conditions and choppy lakes for portions of northeast California
and western Nevada into this evening. Temperatures will cool down
to near seasonal averages Tuesday and Wednesday, then slowly warm
up for the latter part of the week.

&&

.DISCUSSION...

An upper level disturbance is moving over southern and eastern
Oregon this afternoon. Far northern Nevada, including northern
Washoe County, is on edge of the upper forcing/divergence aloft as
evidenced by some high-based clouds there. However, more stable
air is moving into that region with what appears to be ACSL east
of Cedarville. Therefore, no precipitation or deep convection is
expected this evening and all mention of showers or thunderstorms
has been removed from the Surprise Valley and northern Washoe
County.

Tuesday and Wednesday, northeast California and western Nevada
will be under zonal or northwest flow aloft as a weak trough
moves through the interior Pacific Northwest and northern Rockies.
This is expected to keep temperatures moderated somewhat with
seasonally warm highs (after around 10 days well above average).
There will still be some afternoon breeziness but it will be much
reduced as the thermal gradient across the region relaxes.

Rather tranquil conditions will rule Thursday through early next
week as ridging or periodic very weak troughing resides overhead.
Cumulus buildups will be possible over the Sierra Friday and/or
Saturday as slight cooling aloft combines with above average
(yep, again!) temperatures. POP in the Sierra remains very low as
not all simulations show the cooling aloft (GFS much more stable
by Saturday). -Snyder

&&

.AVIATION...

Surface wind gusts 25-35 kts and ridge gusts up to 40-50 kts will
raise the potential for some turbulence through the evening. All
showers and/or thunderstorms are expected to remain near or north
of the Oregon border today. Winds aloft and surface gradients
will relax Tue-Wed for considerably lighter winds. -Snyder

&&

.FIRE WEATHER...

As the ridge of high pressure breaks down, Red Flag Warnings are
in effect through this evening in extreme NE California and through
central and western Nevada for low humidity and gusty winds. Wind
gusts up to 35-40 mph with humidity dropping into the teens and
single digits will persist until around sunset. With some lightning
activity in the region over the last few days, hold-over fires and
any human related ignitions will be a concern today.

Surface temperature and pressure gradients will weaken tomorrow
with wind gusts returning to the 20 to 30 mph range, but localized
critical fire weather conditions will be possible for a few hours
Tuesday afternoon in parts of western Nevada as the afternoon zephyr
kicks in. Conditions are not expected to be widespread or of
significant duration, so no fire weather products will be issued.
However, in dry grasses this can still be enough to create a period
of rapid fire growth.

The rest of the week will see a slight cool down to the upper 80s
before returning to the mid 90s by the weekend. Daily afternoon
wind gusts up to 20-25 mph can be expected most afternoons along
with very dry conditions. After today, no critical fire weather
conditions are expected for the rest of the week. -Zach

&&

.REV Watches/Warnings/Advisories...
NV...Red Flag Warning until 11 PM PDT this evening NVZ450-453-458-459.

     Lake Wind Advisory until 11 PM PDT this evening for Washoe Lake
     in NVZ003.

     Lake Wind Advisory until 11 PM PDT this evening NVZ004.

CA...Red Flag Warning until 11 PM PDT this evening CAZ278.

&&

$$

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



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