FXUS65 KLKN 202218
Area Forecast Discussion
National Weather Service Elko NV
318 PM PDT Tue Mar 20 2018
.SYNOPSIS...A wet Pacific storm will begin to impact Nevada on
Wednesday and persist through early Friday morning. Significant
valley rains, high elevation mountain snows, and gusty south winds
are expected. A cooler weather system will follow Friday night
into the weekend with a chance of lighter mountain and valley snow
.SHORT TERM...Tonight through Friday.
A large and wet Pacfic storm with an Atmospheric River component
will slam into California and begin to spill-over into Nevada on
Wednesday. An initial push of mainly light rain showers will move
across southern into central Nevada/Nye County as another area of
rain and high elevation mountain snow showers sets up across far
northern parts of the state. Afternoon temperatures will climb
into 50s to lower 60s. Rain will overspread Nevada later
Wednesday night into early Thursday morning and continue through
into Thursday evening. Many locations could pick up over half an
inch of liquid precipitation with a few areas exceeding an inch.
Enough instability and dynamics will exist on Thursday that a few
thunderstorms could develop during the afternoon with locally
enhanced rainfall rates and amounts. Strong and gusty south winds
could approach advisory criteria Thursday afternoon and evening.
Minor overland flooding is possible Thursday into Friday given
expected rainfall, saturated soils from recent snowmelt, and the
possibility of rapid snowmelt from mild temperatures at the mid-
slopes of mountain ranges. Significant flooding is NOT expected at
this time, but secondary dirt roads could see minor flooding and
become muddy and impassable. Also, any streams exiting higher
terrain could experience increased cold and swift flows. Use
caution and plan accordingly if traveling on rural roads or
venturing into the backcountry.
Precipitation will diminish from west to east later Thursday
evening into early Friday morning with snow levels lowering
closer to valley floors but not until the main bulk of the
moisture has moved east of the region. Temperatures on Friday will
begin to cool and range from the mid 40s to mid 50s. There will
be a brief lull in the weather later Friday morning through early
Friday night before the next Pacific trough impacts the region
over the weekend.
.LONG TERM...Friday night through Tuesday. Trough energy dropping
in from the Pacific NW Friday night will result in cooling
temperatures along with more precipitation. By sunrise on Saturday
the entire CWA should be cool enough for snow to valley floors.
However, precipitaion Saturday morning will be mainly across
northern NV. Saturday evening and into Sunday snow showers will be
possibly across northern and central NV, with a trace up to 2
inches of snow possible. With trough energy exiting Sunday night
into Monday drier conditions are expected with afternoon highs
returning by Tuesday. Overnight lows should be below normal Sunday
and Monday nights as cooler northwesterly flow dominates.
.AVIATION...Mostly cloudy with periods of rain showers tonight
through Wednesday afternoon across the region. Heaviest rain will
be north of KWMC and KEKO, however some light rain showers are
possible at both KWMC and KEKO. Widespread rainfall is expected
Wednesday evening and night at all terminals which may briefly
reduce cigs and vis.
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