Winter Storm Warning 4, NWS Reno, NV

399 
WWUS45 KREV 032130
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
130 PM PST Sat Dec 3 2022

CAZ073-050000-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T1200Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
130 PM PST Sat Dec 3 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Heavy snow expected with a 10-15% chance of lightning.
  Additional accumulations of 1 to 4 inches below 7000 feet, 
  except 1 to 3 feet above 8000 feet. Wind gusts up to 45 mph with
  ridge winds of 75-100 mph.

* WHERE...Mono County.

* WHEN...From 4 AM Saturday to 4 AM PST Monday.

* IMPACTS...Travel could be very difficult to impossible. Very 
  strong winds could cause extensive tree damage.

* ADDITIONAL DETAILS...Snow levels will be relatively high (7500-
  8500 feet) through Saturday before gradually falling Sunday
  morning. This will result in significant variations of storm
  total snowfall between the mountains and communities at lower
  elevations in Mono county.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1 or
check with Caltrans at quickmap.dot.ca.gov.

&&

$$

CAZ072-NVZ002-050000-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T1200Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
130 PM PST Sat Dec 3 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Heavy snow expected with a 10-15% chance of lightning.
  Additional snowfall accumulations of 3 to 12 inches, 3 to 7
  inches at Lake Tahoe level and 12 to 34 inches above 7500 feet.
  Winds gusting as high as 40 mph on Lake Tahoe with waves up to 
  4 feet. Sierra ridge wind gusts of 80-100 mph possible.

* WHERE...Greater Lake Tahoe Area.

* WHEN...From 4 AM Saturday to 4 AM PST Monday.

* IMPACTS...Travel could be very difficult to impossible. Very 
  strong winds could cause extensive tree damage. Hazardous 
  boating conditions can be expected on Lake Tahoe.

* ADDITIONAL DETAILS...Snow levels will remain relatively high
  (7000-7500 feet) Saturday. This will result in copious amounts
  of snow at higher elevations with likely all rain at Lake Tahoe
  level, including the Truckee and Markleeville areas.
  Precipitation will transition to snow overnight into early 
  Sunday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1 or
check with Caltrans at quickmap.dot.ca.gov.

&&

$$

CAZ071-050000-
/O.CON.KREV.WW.Y.0013.000000T0000Z-221205T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
130 PM PST Sat Dec 3 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
MONDAY...

* WHAT...Snow expected. Storm total snow accumulations of 2 to 6
  inches, except 7 to 18 inches west of highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...From 1 PM Saturday to 4 AM PST Monday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Snow levels will continue to be high
  through Saturday (4500-5500 feet for Lassen, and 6500-7500 feet
  for eastern Plumas and eastern Sierra counties) until overnight
  into early Sunday morning. As a result, the highest storm total
  snow accumulations will be above these elevations.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways.

The latest road conditions can be obtained by calling 5 1 1 or
check with Caltrans at quickmap.dot.ca.gov.

&&

$$

http://www.weather.gov/reno

428 
WWUS45 KREV 041115
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
315 AM PST Sun Dec 4 2022

CAZ073-050000-
/O.EXT.KREV.WS.W.0004.000000T0000Z-221205T0000Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
315 AM PST Sun Dec 4 2022

...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* CHANGES: Adjusted the warning ending time.

* WHAT...Heavy snow. Additional snow accumulations of 2 to 5
  inches, except 6 to 12 inches above 7000 feet. Winds gusting as
  high as 60 mph with ridge level winds of 75-100 mph.

* WHERE...Mono County.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Travel could be very difficult to impossible. Very 
  strong winds could cause extensive tree damage.

* ADDITIONAL DETAILS...Snow levels will continue to be relatively
  high early this morning then fall through the day. This will
  result in significant variations of storm total snowfall between
  the mountains and communities at lower elevations. Also, snow 
  will taper later this morning for lower elevation communities 
  with gusty southwest winds developing across the Highway 395 
  corridor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ072-NVZ002-050100-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T1200Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
315 AM PST Sun Dec 4 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 5
  inches, except up to 10 inches above 7000 feet. Winds gusting as
  high as 40 mph on Lake Tahoe with waves up to 4 feet. Sierra
  ridge wind gusts of 80-100 mph possible.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be very difficult to impossible at times.
  Very strong winds could cause tree damage. Hazardous boating 
  conditions can be expected on Lake Tahoe.

* ADDITIONAL DETAILS...Snow levels will gradually fall through the
  day. Rain at Lake Tahoe level, including the Truckee and
  Markleeville areas will change over to snow with accumulations
  likely with renewed snow showers by this afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ071-050100-
/O.CON.KREV.WW.Y.0013.000000T0000Z-221205T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
315 AM PST Sun Dec 4 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
MONDAY...

* WHAT...Snow. Additional snow accumulations of up to 2 inches,
  except 2 to 4 inches west of highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/reno

056 
WWUS45 KREV 042128
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
128 PM PST Sun Dec 4 2022

CAZ072-NVZ002-052100-
/O.EXT.KREV.WS.W.0004.000000T0000Z-221205T2100Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
128 PM PST Sun Dec 4 2022

...WINTER STORM WARNING NOW IN EFFECT UNTIL 1 PM PST MONDAY...

* CHANGES... Extended the warning until Monday afternoon.

* WHAT...Heavy snow with a 10-15% chance of lightning. Additional
  snow accumulations of 2 to 8 inches, except 4 to 18 inches above
  7000 feet. Wind gusts up to 45 mph with waves to 4 feet on Lake
  Tahoe. Sierra ridges gusting up to 90 mph.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions may impact the morning commute. Very strong winds 
  could cause extensive tree damage. Winds and waves could capsize
  small boats.

* ADDITIONAL DETAILS...A lull in activity is expected Sunday
  evening into the overnight hours on Monday. Additional snowfall
  will arrive early Monday morning which may impact the morning
  commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ073-050000-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T0000Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
128 PM PST Sun Dec 4 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* WHAT...Heavy snow. Additional snow accumulations of up to one
  inch, except up to 4 inches above 9000 feet. Winds gusting as
  high as 80 mph along the ridges.

* WHERE...Mono County.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Plan on slippery road conditions. Very strong winds 
  could cause extensive tree damage.

* ADDITIONAL DETAILS...Snow showers will still remain possible,
  particularly on Monday. However, these will be limited to higher
  elevations near the Sierra crest and will have minimal impacts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ071-052100-
/O.EXT.KREV.WW.Y.0013.000000T0000Z-221205T2100Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
128 PM PST Sun Dec 4 2022

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 1 PM PST MONDAY...

* CHANGES... Extended the advisory until Monday afternoon.

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches,
  except 4 to 12 inches west of highway 395.  

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the Monday morning commute.

* ADDITIONAL DETAILS... Heavier snow bands this afternoon and
  again Monday evening will be capable of producing localized
  heavier snowfall totals, particularly in the higher elevations
  along the Sierra crest above 6500 feet.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/reno

018 
WWUS45 KREV 050001
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
401 PM PST Sun Dec 4 2022

CAZ073-050115-
/O.EXP.KREV.WS.W.0004.000000T0000Z-221205T0000Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
401 PM PST Sun Dec 4 2022

...WINTER STORM WARNING HAS EXPIRED...

The heavy snow has ended over Mono County. Isolated to scattered
snow showers will remain possible late tonight through Monday, but
only spotty light accumulations of up to 3 inches are expected. 

$$

CAZ072-NVZ002-052100-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T2100Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
401 PM PST Sun Dec 4 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM PST MONDAY...

* CHANGES...No major changes. Updated timing of heavier snow 
  bands in the Additional Details section.

* WHAT...Heavy snow. Additional snow accumulations of 2 to 7
  inches, except 6 to 13 inches above 7000 feet. Wind gusts up to
  45 mph with waves to 4 feet on Lake Tahoe through tonight.
  Sierra ridge gusts up to 90 mph. 

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel will be very difficult with significant delays
  at times over main Sierra travel routes through early Monday 
  afternoon. Winds and waves could capsize small boats on Lake 
  Tahoe.

* ADDITIONAL DETAILS...A lull in snow activity is expected later
  this evening through the overnight hours. Additional bands of
  heavier snowfall will arrive early Monday morning which will 
  impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ071-052100-
/O.CON.KREV.WW.Y.0013.000000T0000Z-221205T2100Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
401 PM PST Sun Dec 4 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST
MONDAY...

* CHANGES...No major changes. Updated timing of heavier snow 
  bands in the Additional Details section. 

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches, 
  except 4 to 10 inches west of highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions will impact the Monday morning commute.

* ADDITIONAL DETAILS...After a lull in snow activity this evening,
  Heavier snow bands late tonight through Monday morning evening
  will be capable of producing localized heavier snowfall totals,
  especially in the higher elevations west of US-395.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/reno

520 
WWUS45 KREV 050002 CCA
WSWREV

URGENT - WINTER WEATHER MESSAGE...CORRECTED
National Weather Service Reno NV
402 PM PST Sun Dec 4 2022

CAZ073-050115-
/O.EXP.KREV.WS.W.0004.000000T0000Z-221205T0000Z/
Mono County-
Including the cities of Bridgeport, Coleville, and Mammoth Lakes
402 PM PST Sun Dec 4 2022

...WINTER STORM WARNING HAS EXPIRED...

The heavy snow has ended over Mono County. Isolated to scattered
snow showers will remain possible late tonight through Monday, but
only spotty light accumulations of up to 3 inches are expected. 

$$

CAZ072-NVZ002-052100-
/O.CON.KREV.WS.W.0004.000000T0000Z-221205T2100Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, 
and Incline Village
402 PM PST Sun Dec 4 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM PST MONDAY...

* CHANGES...No major changes. Updated timing of heavier snow 
  bands in the Additional Details section.

* WHAT...Heavy snow. Additional snow accumulations of 2 to 7
  inches, except 6 to 13 inches above 7000 feet. Wind gusts up to
  45 mph with waves to 4 feet on Lake Tahoe through tonight.
  Sierra ridge gusts up to 90 mph. 

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel will be very difficult with significant delays
  at times over main Sierra travel routes through early Monday 
  afternoon. Winds and waves could capsize small boats on Lake 
  Tahoe.

* ADDITIONAL DETAILS...A lull in snow activity is expected later
  this evening through the overnight hours. Additional bands of
  heavier snowfall will arrive early Monday morning which will 
  impact the morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid travel if possible, you could be stuck in your vehicle for
many hours. If you must travel, prepare for long delays and carry
an emergency kit with extra food, water and clothing. If you stay
home, have a backup plan in case of power outages.

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ071-052100-
/O.COR.KREV.WW.Y.0013.000000T0000Z-221205T2100Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
402 PM PST Sun Dec 4 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST
MONDAY...

* CHANGES...No major changes. Updated timing of heavier snow 
  bands in the Additional Details section. 

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches, 
  except 4 to 10 inches west of highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 1 PM PST Monday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions will impact the Monday morning commute.

* ADDITIONAL DETAILS...After a lull in snow activity this evening,
  heavier snow bands late tonight through Monday morning will be 
  capable of producing localized heavier snowfall totals, 
  especially in the higher elevations west of US-395.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/reno

435 
WWUS45 KREV 051041
WSWREV

URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
241 AM PST Mon Dec 5 2022

CAZ072-NVZ002-060000-
/O.CAN.KREV.WS.W.0004.000000T0000Z-221205T2100Z/
/O.EXB.KREV.WW.Y.0013.000000T0000Z-221206T1200Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline, and
Incline Village
241 AM PST Mon Dec 5 2022

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 AM PST TUESDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches,
  except 6 to 12 inches above 7000 feet. Winds gusting as high as
  50 mph over the ridges.

* WHERE...Greater Lake Tahoe Area.

* WHEN...Until 4 AM PST Tuesday.

* IMPACTS...Plan on slippery road conditions with highly variable
  snowfall rates of up to 2" per hour. The hazardous conditions 
  could impact the morning or evening commute. Lake waters will be
  choppy today on Lake Tahoe with wave heights up to 3 feet.

* ADDITIONAL DETAILS...Snow will be showery in nature with a wide
  range of snow amounts possible, depending on where the heavier
  showers occur. Highest snow amounts will generally be along and
  west of Highway 89.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

CAZ071-060000-
/O.EXT.KREV.WW.Y.0013.000000T0000Z-221206T1200Z/
Lassen-Eastern Plumas-Eastern Sierra Counties-
Including the cities of Portola and Susanville
241 AM PST Mon Dec 5 2022

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 AM PST TUESDAY...

* WHAT...Snow. Additional snow accumulations of up to 3 inches, 
  except 4 to 8 inches west of highway 395.

* WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties.

* WHEN...Until 4 AM PST Tuesday.

* IMPACTS...Plan on slippery road conditions with highly variable
  snowfall rates of up to 2" per hour. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Even light snowfall causes major travel delays, especially during
periods of high traffic volume. Be sure to allow extra time to
reach your destination. Leave extra space between vehicles since
it takes longer to stop on slick roadways. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/reno

Area Forecast Discussion
National Weather Service Reno NV
143 PM PST Fri Dec 2 2022

...ANOTHER WINTER STORM ARRIVES THIS WEEKEND...

.SYNOPSIS...

Quiet but chilly weather through the remainder of Friday. Another
potent and prolonged winter storm will approach the area
overnight, bringing more mountain snow and valley rain on
Saturday as snow levels will be initially higher than the previous
storm. Snow levels will fall on Sunday which will allow for more
impacts into lower elevations. Snow showers may linger into the
first part of the work week.

&&

.SHORT TERM (Through Saturday Night)...

What a difference 24 hours can make! While very chilly (it's
still only 32 degrees at our office as of 12pm) , it's a rather
beautiful day outside with ample sunshine and only some patches of
high cirrus. Not much to discuss over the next 12-18 hours as the
nice (but, chilly) weather will prevail through the evening
hours. Cloud cover will eventually return overnight out ahead of
our next winter storm. We'll discuss the first part of the storm
here (through Saturday night) and then my counterpart will detail
the rest of the system in the long term discussion.

The cold front that was associated with yesterday's winter
weather has stalled across SoCal, extending westward into the
Pacific. A weak area of low pressure has formed along this surface
boundary and will gradually traverse east-northeastward. This low
will draw Pacific moisture into SW California by ~ midnight
tonight. This will work its way into the eastern Sierra
(Mono/Alpine counties) during the overnight hours and then into
the Tahoe Basin by daybreak tomorrow. Because of the "warmer"
trajectory with this first piece of the storm, snow levels will be
pretty high (starting at 6500-7000 ft and climbing to 7000-8000
ft south of I-80 during Saturday afternoon). This makes for a
tricky situation with our winter weather warnings/advisories...
While Winter Storm Warnings go into effect at 4am PST Saturday for
Tahoe Basin southward, we likely will see little to no snowfall
impacts at lake level until early Sunday morning - so don't be
surprised if you only experience rain for a bit. Snow levels will
be very close to pass level (Echo/Dagget/Donner) and may even
bounce back and forth between snow and rain/snow mix. Regardless,
plan on winter driving conditions due to the uncertainty of snow
level fluctuations. The highest of the open passes, Mt. Rose, will
remain all snow through the event. Occasional thunder may also be
possible in the higher terrain and it goes without saying that
the ridges will be windy with gusts 70- 100 mph.

To the north, outside of the best warm air advection, snow levels
will be lower tomorrow. Around 6500 ft in Sierra county tapering
off to around 5000 ft in northern Lassen county. However, CAMs
indicate more showery precipitation during the day with the bulk
of precipitation remaining on the western slopes of the Sierra.
During the afternoon we should see more precipitation spread north
and northeast - with gradual lowering of snow levels tomorrow
evening/night. The prolonged low/moderate snowfall rates will
lesson widespread impacts - so the Winter Storm Watch for E
Sierra, E Plumas, and Lassen has been replaced with a Winter
Weather Advisory which will begin at 1pm PST Saturday.

-Dustin

.LONG TERM (Sunday onward)...

High-resolution model guidance is suggesting a brief lull early
Sunday morning behind the precip band associated with the initial
surge of moisture. A closed low currently tracking southward off the
coast of the Pacific Northwest will swing into northern California
on Sunday afternoon, allowing showers to resume in the Sierra. Given
that this low originated over the Gulf of Alaska, this system will
bring much cooler temperatures and a subsequent drop in snow levels
Sunday night into Monday morning. Snow levels may even reach valley
floors Sunday night, with some light accumulations across western
Nevada possible.

Now lets talk snow totals! Overall, accumulations for areas around
7000' or lower have trended downward given the snow levels
trending higher during the onset of precipitation. The high Sierra
in Mono County has the greatest chances for more robust snow
totals, with a 60-70% chance of at least a foot and a 20-40%
chance for at least two feet. For areas above 7000' in the Tahoe
Basin and other Sierra Valleys, there is a 70-80% chance for at
least 6 inches and a 40-50% chance for at least a foot. Areas
below 7000' around the Tahoe Basin will likely see lower snow
totals, as a majority of the precip will fall as rain during the
initial surge of moisture. Best chances for accumulating snow will
exist following the cold frontal passage associated with the low
on Sunday. Overall, for the Tahoe Basin and other Sierra Valleys
below 7000', there is a 70-80% chance for at least 2 inches, a
40-50% chance for at least 6 inches, and a 10-20% chance for at
least a foot. Snow totals look even more dismal across western
Nevada valleys as a majority of precip will fall as rain on
Saturday and Sunday. Most, if not all, of snow accumulations will
fall Sunday night into Monday morning. For these areas, there is a
70-80% chance for at least a trace and 20-30% chance for at least
an inch.

Southwest winds are expected to increase along the Sierra on
Saturday morning ahead of the main closed low system, switching
westerly by Monday. Gusts are expected to peak Sunday morning with
gusts as high as 80+ mph possible along the Sierra crest. Gusty
winds will once again raise concerns for backcountry recreation
and aviation. Visit sierraavalanchecenter.org for more information
on avalanche danger if you plan to head into the backcountry this
weekend.

Snow and rain from the main system is expected to wrap up Monday
morning, but some lingering showers may persist over the Sierra
into Tuesday morning as a longwave trough sags over the western
US. After the system departs our region and skies clear out, all
that will remain is cold temperatures through the remainder of the
week.

-Whitlam

&&

.AVIATION...

Widespread VFR conditions today with only a spattering of high
clouds. Otherwise, light winds for all terminals today.

LLWS and turbulence concerns will return by around 03z for
KTRK/KTVL/KMMH and persist off and on through Monday morning as a
slow-moving upper level trough migrates through the Sierra and
western Nevada. In terms of precipitation, chances for showers will
move into the eastern Sierra first with snow showers possible at
KMMH by 06-09z late tonight. Precipitation will slowly push
northward into the central and northern Sierra through Saturday
morning with chances for showers (rain/snow mix) in western NV by
Saturday afternoon.

Periods of mountain obscuration, snow showers, LLWS, and turbulence
will be possible from late tonight through Monday in the Sierra and
western Nevada.

-Edan

&&

.REV Watches/Warnings/Advisories...
NV...Winter Storm Warning from 4 AM Saturday to 4 AM PST Monday
     NVZ002.

CA...Winter Weather Advisory from 1 PM Saturday to 4 AM PST Monday
     CAZ071.

     Winter Storm Warning from 4 AM Saturday to 4 AM PST Monday
     CAZ072.

     Winter Storm Warning from 4 AM Saturday to 4 AM PST Monday
     CAZ073.

&&

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
1057 AM PST FRI DEC 2 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     HEAVY SNOW       2 NW MEYERS             38.88N 120.03W
12/02/2022  M14.5 INCH       EL DORADO          CA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS 14.5 INCHES OF STORM
            TOTAL SNOW.

0800 AM     HEAVY SNOW       HOMEWOOD MOUNTAIN SKI B 39.09N 120.16W
12/02/2022  M24.0 INCH       PLACER             CA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS 20 INCHES STORM
            TOTAL SNOW.

0800 AM     HEAVY SNOW       1 NNW INCLINE VILLAGE   39.27N 119.97W
12/02/2022  M20.5 INCH       WASHOE             NV   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS 20.5 INCHES STORM
            TOTAL SNOW.

0900 AM     HEAVY SNOW       MAMMOTH MOUNTAIN SKI BA 37.65N 119.03W
12/02/2022  M23.0 INCH       MONO               CA   PUBLIC

            MAMMOTH MOUNTAIN REPORTS 23 INCHES STORM
            TOTAL SNOW AT THE MAIN LODGE.

0900 AM     HEAVY SNOW       MAMMOTH MOUNTAIN SKI SU 37.63N 119.03W
12/02/2022  M30.0 INCH       MONO               CA   PUBLIC

            MAMMOTH MOUNTAIN REPORTS 30 INCHES OF STORM
            TOTAL SNOW AT THE SUMMIT.

0900 AM     HEAVY SNOW       NORTHSTAR CALIFORNIA RE 39.28N 120.12W
12/02/2022  M22.0 INCH       PLACER             CA   PUBLIC

            NORTHSTAR CALIFORNIA RESORT REPORTS 22
            INCHES STORM TOTAL SNOW.

0900 AM     HEAVY SNOW       MT. ROSE SKI AREA       39.33N 119.89W
12/02/2022  M19.0 INCH       WASHOE             NV   PUBLIC

            MT. ROSE SKI AREA REPORTS 19 INCHES STORM
            TOTAL SNOW.

0900 AM     HEAVY SNOW       PALISADES TAHOE SKI BAS 39.20N 120.24W
12/02/2022  M20.0 INCH       PLACER             CA   PUBLIC

            PALISADES TAHOE REPORTS 20 INCHES STORM
            TOTAL SNOW.

0915 AM     HEAVY SNOW       1 WSW MEYERS            38.85N 120.03W
12/02/2022  M22.0 INCH       EL DORADO          CA   PUBLIC

            TWITTER REPORT OF 22 INCHES STORM TOTAL SNOW
            NEAR MEYERS, CA.

0400 PM     SNOW             5 W JUNE MOUNTAIN SKI B 37.78N 119.18W
12/01/2022  M13.2 INCH       MONO               CA   MESONET

            MESONET STATION JEMC1 5.4 W JUNE LAKE.

0400 PM     SNOW             11 ESE CHALFANT         37.48N 118.18W
12/01/2022  M1.1 INCH        MONO               CA   MESONET

            MESONET STATION CWDC1 10.6 E CHALFANT.

0415 PM     SNOW             LEE VINING              37.96N 119.12W
12/01/2022  M1.0 INCH        MONO               CA   TRAINED SPOTTER

            MO06 REPORTED 1 INCH OF NEW SNOWFALL IN THE
            LAST 24 HOURS.

0830 AM     SNOW             1 SW TOMS PLACE         37.55N 118.71W
12/02/2022  E4.0 INCH        MONO               CA   TRAINED SPOTTER

            TRAINED SPOTTER REPORTS 4 INCHES STORM TOTAL
            SNOW.

0919 AM     SNOW             3 NE MT. ROSE SKI BASE  39.36N 119.84W
12/02/2022  M10.0 INCH       WASHOE             NV   PUBLIC

            FACEBOOK REPORT MEASURED 10 INCHES STORM
            TOTAL SNOW NEAR GALENA FOREST AT 6000 FEET.

0930 AM     SNOW             VERDI                   39.53N 120.00W
12/02/2022  M7.7 INCH        WASHOE             NV   PUBLIC

            TWITTER REPORT OF 7.7 INCHES STORM TOTAL
            SNOW NEAR VERDI, CA.

1000 AM     SNOW             1 SE WOODFORDS          38.77N 119.81W
12/02/2022  M11.0 INCH       ALPINE             CA   PUBLIC

            FACEBOOK REPORT OF 11 INCHES STORM TOTAL
            SNOW IN WOODFORDS, CA.

1021 AM     SNOW             1 WSW LAKEVIEW          39.20N 119.81W
12/02/2022  M3.8 INCH        CARSON CITY        NV   PUBLIC

            FACEBOOK REPORT OF 3.75 INCHES STORM TOTAL
            SNOW NEAR CARSON CITY, NV.

1030 AM     SNOW             LOYALTON                39.68N 120.24W
12/02/2022  M1.0 INCH        SIERRA             CA   PUBLIC

            FACEBOOK REPORT OF 1 INCH STORM TOTAL SNOW
            NEAR LOYALTON, CA.

&&

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