Alert archive / Utah / Winter Storm Warnings in 2021

Winter Storm Warning 6, NWS Salt Lake City, UT

October 11, 202117 counties in Utah

NWS Salt Lake City, UT issued this winter storm warning at Oct 11, 2021, 3:10 PM MDT for 17 counties in Utah. It took effect at Oct 11, 2021, 6:00 PM MDT. It was in force for 30 hr. 34 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Oct 11, 2021, 3:10 PM MDT (21:10 UTC)
In effect from
Oct 11, 2021, 6:00 PM MDT
Expired
Oct 12, 2021, 11:54 PM MDT
In force
30 hr
Issued by
NWS Salt Lake City, UT

Counties Beaver County, UT, Carbon County, UT, Duchesne County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Juab County, UT, Kane County, UT, Millard County, UT, Piute County, UT, Sanpete County, UT, Sevier County, UT, Summit County, UT, Utah County, UT, Wasatch County, UT, Washington County, UT, Wayne County, UT

The radar

The Cedar City radar (KICX), 178 km from the middle of the area, began a volume at 21:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Oct 12, 6:30 AM MDTSNOW 1.8Oakley, UT
Oct 12, 7:00 AM MDTSNOW 0.3Beaver, UT
Oct 12, 7:00 AM MDTSNOW 2.7Newcastle, UT
Oct 12, 7:00 AM MDTSNOW 6Cedar City, UT
Oct 12, 7:00 AM MDTSNOW 6.4Cedar City, UT
Oct 12, 7:10 AM MDTSNOW 3.3Park City, UT
Oct 12, 7:30 AM MDTSNOW 1.5Oak City, UT
Oct 12, 7:36 AM MDTSNOW 7Cedar City, UT
Oct 12, 7:56 AM MDTSNOW 1Kanab, UT
Oct 12, 8:00 AM MDTSNOW 1Marysvale, UT
Oct 12, 8:00 AM MDTSNOW 1.5Loa, UT
Oct 12, 8:00 AM MDTSNOW 3Richfield, UT
Oct 12, 8:00 AM MDTSNOW 4New Harmony, UT
Oct 12, 8:00 AM MDTSNOW 6Heber City, UT
Oct 12, 8:05 AM MDTSNOW 4Enoch, UT&&
Oct 12, 8:05 AM MDTSNOW 4Enoch, UT
Oct 12, 8:38 AM MDTSNOW 3Scofield, UT
Oct 12, 8:38 AM MDTSNOW 10Cedar City, UT
Oct 12, 8:46 AM MDTSNOW 52 S Richfield, UT
Oct 12, 8:47 AM MDTSNOW 311 Sse Torrey, UT
Oct 12, 8:47 AM MDTSNOW 10New Harmony, UT
Oct 12, 8:47 AM MDTSNOW 15Park City, UT
Oct 12, 8:51 AM MDTSNOW 0.8Torrey, UT&&
Oct 12, 8:51 AM MDTSNOW 0.8Torrey, UT
Oct 12, 9:11 AM MDTSNOW 4Kanab, UT
Oct 12, 9:30 AM MDTSNOW 8.5Parowan, UT
Oct 12, 10:12 AM MDTSNOW 6Fillmore, UT
Oct 12, 10:28 AM MDTSNOW 4Richfield, UT
Oct 12, 10:38 AM MDTSNOW 104 Wsw Wanship, UT&&
Oct 12, 10:38 AM MDTSNOW 104 Wsw Wanship, UT
Oct 12, 10:41 AM MDTSNOW 7Summit Park, UT
Oct 12, 1:10 PM MDTSNOW 2.5Central, UT
Oct 12, 1:10 PM MDTSNOW 4Pine Valley, UT
Oct 12, 3:49 PM MDTSNOW 10Cedar City, UT&&

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.2 hours before the alert went out and 202 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 2021-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2021-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 145 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2033 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
145 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

722 
WWUS45 KSLC 112110
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
310 PM MDT Mon Oct 11 2021

UTZ112-113-121200-
/O.UPG.KSLC.WS.A.0006.211012T0000Z-211013T0600Z/
/O.NEW.KSLC.WS.W.0006.211012T0000Z-211013T0600Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Including the cities of Mirror Lake Highway, Moon Lake, Scofield,
and Indian Canyon
310 PM MDT Mon Oct 11 2021

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT TUESDAY NIGHT...

* WHAT...Heavy snow expected. Total snow accumulations 8 to 18
  inches with locally higher amounts.

* WHERE...Western Uinta Mountains and Wasatch Plateau/Book 
  Cliffs.

* WHEN...From 6 PM this evening to midnight MDT Tuesday night.

* IMPACTS...Winter driving conditions can be expected across all
  mountain routes including Indian Canyon. Seasonal routes will 
  be heavily impacted. Hunters and hikers should be prepared for 
  severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ117-125-121200-
/O.UPG.KSLC.WS.A.0006.211012T0000Z-211013T0600Z/
/O.NEW.KSLC.WS.W.0006.211012T0400Z-211013T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
310 PM MDT Mon Oct 11 2021

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 6 PM
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 10 to 20
  inches with locally higher amounts.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...From 10 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Winter driving conditions are expected on all mountain
  routes including passes and summits on I-15 and I-70. Seasonal
  routes will be heavily impacted. Hunters and hikers should be
  prepared for severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ116-122-121200-
/O.UPG.KSLC.WS.A.0006.211012T0000Z-211013T0600Z/
/O.NEW.KSLC.WS.W.0006.211012T0400Z-211013T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, and Milford
310 PM MDT Mon Oct 11 2021

...WINTER STORM WARNING IN EFFECT FROM 10 PM THIS EVENING TO 6 PM
MDT TUESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 10
  inches with locally higher amounts. 

* WHERE...Eastern Juab/Millard Counties and Southwest Utah.

* WHEN...From 10 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Winter driving conditions are expected across routes
  along the I-15 corridor including Cedar City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ111-121200-
/O.UPG.KSLC.WS.A.0006.211012T0000Z-211013T0600Z/
/O.NEW.KSLC.WW.Y.0018.211012T0000Z-211013T0600Z/
Wasatch Mountains South of I-80-
Including the cities of Alta and Brighton
310 PM MDT Mon Oct 11 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT TUESDAY NIGHT...

* WHAT...Snow expected. 5 to 10 inches with locally higher amounts
  possible, particularly in the upper Cottonwoods. 

* WHERE...Wasatch Mountains South of I-80.

* WHEN...From 6 PM this evening to midnight MDT Tuesday night.

* IMPACTS...Winter driving conditions are expected. Seasonal
  routes will be impacted. Hunters and hikers should be prepared 
  for severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ115-121200-
/O.UPG.KSLC.WS.A.0006.211012T0000Z-211013T0600Z/
/O.NEW.KSLC.WW.Y.0018.211012T0400Z-211013T0000Z/
Western Millard and Juab Counties-
Including the cities of Delta and Little Sahara
310 PM MDT Mon Oct 11 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO
6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 5 inches
  with little to no accumulation at the lowest elevations such as
  Delta. Winds gusting as high as 45 mph.

* WHERE...Western Millard and Juab Counties.

* WHEN...From 10 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Winter driving conditions are possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ110-121200-
/O.NEW.KSLC.WW.Y.0018.211012T0000Z-211013T0600Z/
Wasatch Mountains I-80 North-
Including the cities of Mantua and Logan Summit
310 PM MDT Mon Oct 11 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
MIDNIGHT MDT TUESDAY NIGHT...

* WHAT...Snow expected. 5 to 10 inches with locally higher amounts
  possible

* WHERE...Wasatch Mountains I-80 North.

* WHEN...From 6 PM this evening to midnight MDT Tuesday night.

* IMPACTS...Winter driving conditions are expected. Seasonal
  routes will be impacted. Hunters and hikers should be prepared 
  for severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ118-119-126-127-129-121200-
/O.NEW.KSLC.WW.Y.0018.211012T0400Z-211013T0000Z/
Sanpete Valley-Sevier Valley-Upper Sevier River Valleys-
Bryce Canyon Country-Capitol Reef National Park and Vicinity-
Including the cities of Manti, Ephraim, Mt Pleasant, Richfield, 
Salina, Panguitch, Circleville, Koosharem, Bryce Canyon City, 
Loa, and Torrey
310 PM MDT Mon Oct 11 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO
6 PM MDT TUESDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 5 inches
  with locally higher amounts in heavier snow bands. 

* WHERE...Sanpete Valley, Sevier Valley, Upper Sevier River 
  Valleys, Bryce Canyon Country and Capitol Reef National Park 
  and Vicinity.

* WHEN...From 10 PM this evening to 6 PM MDT Tuesday.

* IMPACTS...Winter driving conditions are possible. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
4 follow-up statements
248 
WWUS45 KSLC 120827
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
227 AM MDT Tue Oct 12 2021

UTZ112-113-130000-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0600Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Including the cities of Mirror Lake Highway, Moon Lake, Scofield,
and Indian Canyon
227 AM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Heavy snow expected. Additional accumulations of 3 to 7
  inches expected.

* WHERE...Western Uinta Mountains and Wasatch Plateau/Book 
  Cliffs. 

* WHEN...Through midnight MDT tonight.

* IMPACTS...Winter driving conditions can be expected across all 
  mountain routes including Indian Canyon. Seasonal routes will 
  be heavily impacted. Hunters and hikers should be prepared for 
  severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ117-125-130000-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
227 AM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy snow expected. Additional snow accumulations of 6
  to 14 inches expected with locally higher amounts.
  
* WHERE...Central Mountains and Southern Mountains.

* WHEN...Through 6 PM MDT this evening.

* IMPACTS...Winter driving conditions are expected on all 
  mountain routes including passes and summits on I-15 and I-70. 
  Seasonal routes will be heavily impacted. Hunters and hikers 
  should be prepared for severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ116-122-130000-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, and Milford
227 AM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy snow expected. Additional accumulations of 3 to 6
  inches expected with locally higher amounts.
  
* WHERE...Eastern Juab/Millard Counties and Southwest Utah.

* WHEN...Through 6 PM MDT this evening.

* IMPACTS...Winter driving conditions are expected across routes 
  along the I-15 corridor including Cedar City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ110-111-130000-
/O.CON.KSLC.WW.Y.0018.000000T0000Z-211013T0600Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the cities of Mantua, Logan Summit, Alta, and Brighton
227 AM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Snow expected. additional accumulations of 3 to 7 inches
  expected, particularly in the upper Cottonwoods.
  
* WHERE...Wasatch Mountains South of I-80.

* WHEN...Through midnight MDT tonight.

* IMPACTS...Winter driving conditions are expected. Seasonal 
  routes will be impacted. Hunters and hikers should be prepared 
  for severe winter conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ115-118-119-126-127-129-130000-
/O.CON.KSLC.WW.Y.0018.000000T0000Z-211013T0000Z/
Western Millard and Juab Counties-Sanpete Valley-Sevier Valley-
Upper Sevier River Valleys-Bryce Canyon Country-
Capitol Reef National Park and Vicinity-
Including the cities of Delta, Little Sahara, Manti, Ephraim, 
Mt Pleasant, Richfield, Salina, Panguitch, Circleville, 
Koosharem, Bryce Canyon City, Loa, and Torrey
227 AM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Snow expected. Total snow accumulations of 2 to 5 inches
  with little to no accumulation at the lowest elevations such as
  Delta. 

* WHERE...Western Millard and Juab Counties.

* WHEN...Through 6 PM MDT Tuesday.

* IMPACTS...Winter driving conditions are possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$
885 
WWUS45 KSLC 122049
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
249 PM MDT Tue Oct 12 2021

UTZ116-122-122200-
/O.CAN.KSLC.WS.W.0006.000000T0000Z-211013T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, and Milford
249 PM MDT Tue Oct 12 2021

...WINTER STORM WARNING IS CANCELLED...

Accumulating snow has largely ended across eastern Juab, eastern
Millard Counties and southwestern Utah. Snow may remain on some of
the higher passes of I-15, continue to remain vigilant for winter
driving conditions. 

$$

UTZ115-122200-
/O.CAN.KSLC.WW.Y.0018.000000T0000Z-211013T0000Z/
Western Millard and Juab Counties-
Including the cities of Delta and Little Sahara
249 PM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Accumulating snow has ended, therefore the winter weather advisory
has been cancelled early. 

$$

UTZ112-113-130600-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0600Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Including the cities of Mirror Lake Highway, Moon Lake, Scofield,
and Indian Canyon
249 PM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations of up to two 
  inches.

* WHERE...Wasatch Plateau/Book Cliffs and Western Uinta 
  Mountains.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Winter driving conditions can be expected into the
  evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ117-125-130000-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
249 PM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of up to two 
  inches.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Winter driving conditions can be expected into the
  early evening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ110-111-130600-
/O.CON.KSLC.WW.Y.0018.000000T0000Z-211013T0600Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the cities of Mantua, Logan Summit, Alta, and Brighton
249 PM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Snow. Additional snow accumulations of up to two inches.

* WHERE...Wasatch Mountains South of I-80 and Wasatch Mountains 
  I- 80 North.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Winter driving conditions can be expected into the
  evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ118-119-126-127-129-130000-
/O.CON.KSLC.WW.Y.0018.000000T0000Z-211013T0000Z/
Sanpete Valley-Sevier Valley-Upper Sevier River Valleys-
Bryce Canyon Country-Capitol Reef National Park and Vicinity-
Including the cities of Manti, Ephraim, Mt Pleasant, Richfield, 
Salina, Panguitch, Circleville, Koosharem, Bryce Canyon City, 
Loa, and Torrey
249 PM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to one inch. 

* WHERE...Capitol Reef National Park and Vicinity, Bryce Canyon 
  Country, Sevier Valley, Upper Sevier River Valleys and Sanpete 
  Valley.

* WHEN...Until 6 PM MDT this evening.

* IMPACTS...Occasional winter driving conditions can be expected 
  into the evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
620 
WWUS45 KSLC 130150
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
750 PM MDT Tue Oct 12 2021

UTZ112-113-130600-
/O.CON.KSLC.WS.W.0006.000000T0000Z-211013T0600Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Including the cities of Mirror Lake Highway, Moon Lake, Scofield,
and Indian Canyon
750 PM MDT Tue Oct 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Heavy snow. Additional snow accumulations of up to one 
  inch.

* WHERE...Wasatch Plateau/Book Cliffs and Western Uinta 
  Mountains.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

UTZ110-111-130600-
/O.CON.KSLC.WW.Y.0018.000000T0000Z-211013T0600Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the cities of Mantua, Logan Summit, Alta, and Brighton
750 PM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Snow. Additional snow accumulations of up to one inch.

* WHERE...Wasatch Mountains South of I-80 and Wasatch Mountains 
  I- 80 North.

* WHEN...Until midnight MDT tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.

For winter road conditions from the Utah Department of
Transportation, visit
http://www.udottraffic.utah.gov/roadweatherforecast.aspx or dial
511.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
810 
WWUS45 KSLC 130554
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
1154 PM MDT Tue Oct 12 2021

UTZ112-113-130700-
/O.CAN.KSLC.WS.W.0006.000000T0000Z-211013T0600Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Including the cities of Mirror Lake Highway, Moon Lake, Scofield,
and Indian Canyon
1154 PM MDT Tue Oct 12 2021

...WINTER STORM WARNING IS CANCELLED...

Occasional, light snow showers will be possible through the night,
especially for northwest-facing slopes, however additional
accumulations will generally be less than one inch, thus the
Winter Storm Warning is cancelled.

$$

UTZ110-111-130700-
/O.CAN.KSLC.WW.Y.0018.000000T0000Z-211013T0600Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the cities of Mantua, Logan Summit, Alta, and Brighton
1154 PM MDT Tue Oct 12 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Occasional, light snow showers will be possible through the night,
especially for northwest-facing slopes and locations south and
east of Utah Lake, however additional accumulations will 
generally be less than one inch, thus the Winter Weather Advisory 
is cancelled.

$$

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 11, 3:10 PM MDTWinter Weather AdvisorySLCBox Elder, Cache, Davis, Emery, Garfield, Juab and 13 more33 hr
Oct 11, 3:20 PM MDTHard Freeze WatchSLCBox Elder, Carbon, Davis, Duchesne, Emery, Garfield and 5 more11 hr
Oct 11, 3:20 PM MDTHard Freeze WarningSLCBeaver, Emery, Garfield, Iron, Juab, Millard and 3 more19 hr
Oct 11, 3:20 PM MDTWind AdvisorySLCBox Elder, Juab, Millard, Salt Lake, Tooele, Utah24 hr

Nearby

Winter Storm Warnings in Utah, 2021Every winter storm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.