Area Forecast Discussion
Issued by NWS Elko, NV

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FXUS65 KLKN 210953

Area Forecast Discussion
National Weather Service Elko NV
253 AM PDT Tue May 21 2019

.SYNOPSIS...Another low pressure system moves into the region
today bringing cooler temperatures along with a little more
precipitation. Cool and showery conditions will continue through
Thursday, with warmer though still showery conditions Friday on
through the weekend.


.SHORT TERM...Today through Wednesday. Low pressure moving in from
the northwest today will result in cooler temperatures and more
light to locally moderate shower activity across most of northern
and central NV. With the upper level low centered over NV tonight,
most locations will have their coldest lows of the week early
Wednesday morning. The low will dig south on Wednesday centering
over southern NV and CA, leaving cool and showery northeasterly
flow over northern and central NV. Main concern in the short term
will be the colder temperatures, which may lead to some light
valley snow showers along with increased potential for icy roads
tonight into early Wednesday morning.

.LONG TERM...Wednesday night through next Monday. Unsettled
conditions are expected to last through the long Memorial Day
weekend. A broad, cool trough of low pressure will envelop the
western CONUS and multiple low pressure waves will drop south into
the synoptic feature. The mean trough will be open to the north
and northeast, periodically bringing in colder air. In addition,
central low pressure will hover over Nevada for most of the period,
at times stretching westward over the Pacific to introduce new
moisture to the arena. Snow will, at times mix in with the general
storminess. Thunderstorms are expected each afternoon and
evening. TS activity could become more nocturnal Memorial Day weekend
as the trough retrogrades farther out in the Pacific to scoop up
more moisture. There are indications of a change early next week
that could allow the upper low to move east with a hastening
pattern aloft. However high chances for precipitation will
continue for northern Nevada through the middle of next week.
Daytime temperatures will be below normal. Overnight lows will be
near normal for this time of year.


.AVIATION...A cold and moist low pressure system will move into
northwest Nevada this morning then slowly dig southeastward to
around Las Vegas by noon Wednesday. Valley rain or mixed rain/snow
showers and mountain snows will spread across the state today
into Wednesday with a chance of a few afternoon thunderstorms
developing each day. MVFR conditions will increase with areas of
IFR likely Tuesday night into Wednesday. Expect obscured mountains
en route throughout most of the region.

A southwest breeze will gust 20 to 25 kts at KWMC and KEKO while
KTPH will experience northwest wind gusts over 30 kts during this
late afternoon and early evening.


.FIRE WEATHER...A busy weather cycle will continue over the next
few days as several weather disturbances bring waves of rain and
mountain snow to the state. High humidity and cool temperatures
will persist through the rest of the week resulting in a limited
fire weather threat.


.HYDROLOGY...Creeks, streams, and rivers will experience some rises
this week and some have returned to monitor stage due to the
recent rain events. Continued rises will occur over the next 7
days as the active and wet pattern continues. However, levels are
expected to stay below flood stage as cool temperatures remain in
the region inhibiting snowmelt.





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