Special Weather Statement, NWS Elko, NV

Area Forecast Discussion
National Weather Service Elko NV
253 PM PDT Wed Jun 24 2020

.SYNOPSIS...Increasing moisture and a short wave will help
generate scattered showers and thunderstorms this evening. Drier
air moves into northwest Nevada Thursday, but scattered showers
and storms continue to affect the eastern half. A strong cold
front pushes into the region later this weekend.

&&

.SHORT TERM...Tonight through Friday.
Potential instability exists this afternoon and evening with a
mixed wet and dry storm environment, transitioning to wet storms
overnight. The morning sounding suggest a dry sub-cloud layer, but
not bone dry as there is some moisture below 500 mb. Precipitable
water on the dry side and below three quarters of an inch.
Approaching Pacific Northwest short wave that trails into NoCal
moves into northwest NV later tonight and provides some modest
upwards forcing. Afternoon storms will generate strong outflow
winds, particularly over central NV where the air mass is drier.
As the upper level dynamics arrive, expect more storms producing
some rain.

For Thursday, positively tilted trough will be positioned over
eastern NV and maybe a small closed low circulation centered near
Ely. Expect scattered showers and storms from the northeast NV
corner and trailing back to the middle part of the state. Isolated
strong thunderstorms may occur over White Pine County as some
shear exists. West of a line from Wildhorse to Austin, air mass
will be drier and stable with more sunshine. With respect to
temperatures, cooler with temperatures falling back several
degrees.

.LONG TERM...Friday through next Tuesday. Northwest flow will help
to bring in drier air to the area for Friday. Skies are expected
to be mostly sunny that day. High temperatures will be climbing
back into the mid 80s to low 90s in the area. Look for quiet
weather to continue during the overnight with lows in the low to
upper 50s.

Saturday. An upper level low pressure system in southwest Canada
will be diving to the south. This will bring increasing breezy
winds to northern and central Nevada. Though all areas are not
expected to see advisory level winds, some gusts of 25 to 35 mph
are possible. It will be dry outside with relative humidity
values of 8 to 14 percent in many areas. Highs will be in the 90s
in many locations. Some isolated thunderstorms may be possible in
extreme northeastern Elko county and possibly in central Nevada
along the US Highway 50 corridor. The activity is anticipated to
wind down during the Saturday overnight period with lows in the
50s for many areas.

On Sunday, the aforementioned upper low will continue its trek
southeast and will be somewhere around northeast Oregon or western
Idaho. Strong winds will develop out ahead of this system, which
is anomalous for this time of year. Southwest winds of 15 to 25
mph with gusts of 35 to 40 mph are possible. There could be some
fire weather concerns, especially in central Nevada. In addition,
isolated showers and thunderstorms are forecast to develop across
northeast Elko county. Highs for Sunday will be about 10 degrees
cooler than Saturday with readings in the low to upper 80s. Look
for showers to continue into the overnight with lows in the 40s.
Some of the colder locales could see the mid 30s during the
overnight.

Model solutions are trending a more southerly track for the upper
low, with the system in southern Idaho and northern Nevada for
Monday. Isolated to scattered showers and thunderstorms will
develop during the afternoon, while afternoon highs dip into the
mid 60s to mid 70s across the area. Some question remains as to
how fast the trough axis may move out of the state on Tuesday, but
drier weather and warming temperatures will likely follow through
midweek.

&&

.AVIATION...Isolated to scattered showers and thunderstorms have
developed during the afternoon hours today and will continue into
the early evening hours. Some gusty outflow winds of 40KT have
been seen with some of the storms, along with brief heavy rain.
Reductions to VSBY has been seen due to heavy rain and BLDU, but
have remained greater than 5SM. For tomorrow, the threat for
showers and thunderstorms is expected to end for KWMC and KBAM,
though isolated activity is possibly for KEKO. Best chances for
TSRA continue to be at the KELY terminal, especially in the late
morning hours. Some wind gusts to 25KT will be possible.

&&

.FIRE WEATHER...
Isolated dry thunderstorms this afternoon with strong outflow
winds this evening, especially the valleys of central NV where the
gust potential is the greatest. The trend will be for more wet
storms this evening and humidity values will rise.

For the upcoming weekend, anomalous strong trough and associated
surface cold front sweeps into northern/central Nevada by Sunday,
increasing gradient wind. Critical conditions are possible, and
another factor to consider will be holdovers from today and
Thursday.

&&

.LKN WATCHES/WARNINGS/ADVISORIES...
None.
&&

88/86/86/88

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Special Weather Statement
National Weather Service Elko NV
412 PM PDT Wed Jun 24 2020

NVZ034-038-039-250000-
Southwest Elko County NV-South Central Elko County NV-
Ruby Mountains and East Humboldt Range NV-
412 PM PDT Wed Jun 24 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ELKO COUNTY UNTIL 500 PM
PDT...

At 410 PM PDT, Doppler radar was tracking a strong thunderstorm near
Lamoille, moving northeast at 15 mph.

Wind gusts 40 to 50 mph will be possible with this storm.

Locations impacted include...
Lamoille, Ruby Valley, Clover Valley, Spring Creek, Secret Pass and
Lamoille Canyon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4059 11538 4073 11552 4104 11505 4080 11477
TIME...MOT...LOC 2310Z 232DEG 11KT 4071 11538

aky

Special Weather Statement
National Weather Service Elko NV
421 PM PDT Wed Jun 24 2020

NVZ030-250000-
Humboldt County NV-
421 PM PDT Wed Jun 24 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL HUMBOLDT COUNTY
UNTIL 500 PM PDT...

At 419 PM PDT, Strong thunderstorms were located in northwest
Humboldt County. These storms are moving towards the northeast at
around 15 mph.

Half inch hail and wind gusts of 40 to 50 mph will be possible with
this storm.

Locations impacted include...
Kings River Valley, Leonard Creek Ranch, Denio, Denio Summit, Thacker
Pass and Onion Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4168 11782 4142 11864 4188 11895 4199 11864
      4200 11807
TIME...MOT...LOC 2319Z 242DEG 47KT 4155 11859

90