Severe Thunderstorm Warning 6, NWS Reno, NV

533 
WWUS55 KREV 242125
SVSREV

Severe Weather Statement
National Weather Service Reno NV
225 PM PDT MON JUL 24 2017

NVC021-242131-
/O.CAN.KREV.SV.W.0006.000000T0000Z-170724T2130Z/
Mineral NV-
225 PM PDT MON JUL 24 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MINERAL COUNTY IS
CANCELLED...
   
 Thunderstorms will continue to impact the region through this 
evening. Be prepared for strong gusty winds, lightning, and heavy 
rain.

LAT...LON 3901 11909 3901 11926 3908 11931 3909 11938
      3934 11944 3931 11903
TIME...MOT...LOC 2121Z 180DEG 26KT 3913 11919 

$$

NVC019-242130-
/O.CON.KREV.SV.W.0006.000000T0000Z-170724T2130Z/
Lyon NV-
225 PM PDT MON JUL 24 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM PDT
FOR CENTRAL LYON COUNTY...

At 221 PM PDT, strong thunderstorms were located over Wabuska 
and Yerington moving north at 15 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Weather spotter indicated 0.25 inch size hail and heavy 
         rain with this storm at 2PM.

IMPACT...Damage to fencing and trees possible. Blowing dust may 
         result in serious visibility restrictions. 

Locations impacted include...
Wabuska, Fort Churchill Station and Silver Springs. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3901 11909 3901 11926 3908 11931 3909 11938
      3934 11944 3931 11903
TIME...MOT...LOC 2121Z 180DEG 26KT 3913 11919 

HAIL...0.75IN
WIND...60MPH
 
$$

EW

Area Forecast Discussion
National Weather Service Reno NV
350 AM PDT Mon Jul 24 2017

.SYNOPSIS...

Isolated to scattered thunderstorms are expected through Tuesday
for northeast California and western Nevada. Stronger afternoon
and evening storms could bring heavy rain and localized flash
flooding. Drier air begins to invade Wednesday for much reduced
coverage of thunderstorms, with dry weather expected Thursday
through Saturday. Near average high temperatures will rise to
above average late week.

&&

.SHORT TERM...

Large-scale lift out ahead of an upper low near the California
coast, and possibly a lower level boundary, are providing the
focus for isolated to scattered thunderstorms this morning over
western and west-central NV. Small rain cores and decent storm
motions are increasing the chance for fire starts with occasional
cloud-to-ground lightning...especially near and north of Highway
50. Farther north into northeast CA, the upper forcing is
evidenced by cooling cloud tops in the infrared satellite. A few
fast-moving and mainly dry thunderstorms could develop in the next
few hours north of I-80 in northeast CA.

For this afternoon and evening, another round of diurnal
thunderstorms is on tap as moisture continues to slowly increase
with persistent southerly flow aloft ahead of the northern CA
upper low. PWATs are already around 0.7" per an IPW sensor in
Reno, and simulations show PWATs rising up to around an inch out
in the Basin and Range today. Thunderstorms this afternoon could
be a bit stronger than Sunday with increasing shear aloft possibly
allowing for longer-lived and/or more organized thunderstorms. The
increased moisture and stronger storms will tend to allow for more
rainfall (but also more lightning!) from thunderstorms as compared
to Sunday.

Nocturnal convection looks possible again tonight as the upper low
remains stubbornly near the northern CA coast. The best shot for
elevated nocturnal convection looks mainly north of Highway 50 in
western and northwestern NV, and east of Highway 395 in extreme
northeast CA. Tuesday, afternoon convection is shown to initiate
farther east in simulations as the upper low gets a bit closer...
mainly over western and northwestern NV. I have left a 15-30%
chance in eastern CA for Tuesday afternoon but this may need to be
trimmed if simulations hold with their current thinking.

On Wednesday, coverage of convection drops off substantially as
the upper low pressure moves over far northern CA and brings a
dry slot into the region. The locations for a few leftover showers
or storms will be north of Gerlach and south and east of a
Winnemucca to Fallon to Bridgeport line. -Snyder

.LONG TERM...Thursday through Monday...

Dry southwest flow returns to the region for the last half of the
week. Temperatures will be increasing, with highs reaching into the
upper 90s once again with 80s in the Sierra by Thursday. The Four
Corners High remains in place through the weekend, which will bring
southerly flow and spread monsoonal moisture back into our area by
Sunday-Monday. We have a slight chance of thunderstorms in the
forecast for Sunday-Monday, although mainly for Mono-Mineral
Counties as the best chances remain south of highway 50. Hoon

&&

.AVIATION...

Nocturnal high-based thunderstorms have developed in western Nevada
early this morning and will continue to push through the region
through the early morning. Thunderstorm chances increase this
afternoon as well, as we get daytime heating and instability. 30%
chance of thunderstorms for all terminals today with the main
threats being lightning, small hail, gusty outflow winds and
localized heavy rainfall.  Thunderstorm chances will continue for
Tuesday, but threats will transition to heavy rain and increased
potential for flash flooding. Hoon

&&

.FIRE WEATHER...

Scattered high-based thunderstorms have developed over western
Nevada last night and early this morning associated with an upper
level wave moving through the area. These storms are fast-moving
with little rainfall and dry lightning strikes. New lightning fires
are likely though the morning. A least four large fires are visible
on satellite imagery this morning in western Nevada--two fires in
Pershing County and two fires in Humboldt County. It's likely that
there are more fires out there and potential "sleepers" that may
come alive later today as we warm up.

Scattered thunderstorms will continue into the afternoon hours, with
increasing moisture and higher potential for wetting rains. Humidity
will also be higher today with slightly cooler temperatures as well.
Warming and drying conditions follow Wednesday through Friday with
poor humidity recoveries for the mid and upper slopes. Thunderstorm
chances look to return by Sunday. Hoon

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

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

Special Weather Statement
National Weather Service Reno NV
1207 PM PDT MON JUL 24 2017

CAZ070>073-NVZ001>005-241930-
Surprise Valley California CA-Lassen-Eastern Plumas-
Eastern Sierra Counties CA-Greater Lake Tahoe Area CA-Mono CA-
Greater Lake Tahoe Area NV-
Western Nevada Basin and Range including Pyramid Lake NV-
Northern Washoe County NV-Greater Reno-Carson City-Minden Area NV-
Mineral and Southern Lyon Counties NV-
1207 PM PDT MON JUL 24 2017

...THUNDERSTORMS ARE BEGINNING TO FIRE UP...

Doppler radar is filling in with thunderstorms firing over terrain
features in northeastern California and western Nevada. These storms
will move off of terrain and impact area valleys through the rest of
this afternoon into this evening.

Winds in excess of 40 mph will be possible with any thunderstorms
that occur. These winds will pose a hazard to current wildfire
personnel with additional fire starts possible. Flash flooding is
not out of the question if thunderstorm cells begin to anchor to
terrain features. Areas of blowing dust may occur especially east of
Highway 95A.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Cloud to ground lightning may become frequent in a few of this
afternoon and evening's storm cells. Lightning can strike 10 miles
away from a thunderstorm. Seek a safe shelter inside a building or
vehicle.

If on or near a lake and you see lightning or hear thunder, get out
of the water and move indoors or inside a vehicle. Don't be caught
on the water in a thunderstorm. Strong wind gusts and lightning pose
an immediate danger to boaters. Gusty winds will cause a rapid
increase in wave heights which may capsize small boats.

&&

LAT...LON 3773 11926 4059 12132 4118 12133 4119 12005
      4170 12023 4199 12004 4200 12001 4199 11932
      4096 11933 4086 11765 4068 11764 4068 11730
      3955 11749 3910 11778 3900 11819 3847 11770
      3789 11842 3747 11783 3746 11784 3746 11878
TIME...MOT...LOC 1859Z 240DEG 0KT 3924 11929

MB