Alert archive / Utah / Wind Chill Warnings in 2023

Wind Chill Warning 5, NWS Salt Lake City, UT

February 15, 20238 counties in Utah

NWS Salt Lake City, UT issued this wind chill warning at Feb 15, 2023, 2:11 AM MST for 8 counties in Utah. It took effect at Feb 15, 2023, 11:00 PM MST. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Feb 15, 2023, 2:11 AM MST (09:11 UTC)
In effect from
Feb 15, 2023, 11:00 PM MST
Expired
Feb 16, 2023, 9:00 AM MST
In force
10 hr
Issued by
NWS Salt Lake City, UT

Counties Emery County, UT, Garfield County, UT, Iron County, UT, Kane County, UT, Rich County, UT, Sevier County, UT, Washington County, UT, Wayne County, UT

The radar

The Cedar City radar (KICX), 134 km from the middle of the area, began a volume at 09:14 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.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 9.2 hours before the alert went out and 254 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 00:00Z on 2023-02-15Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 00:00Z on 2023-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
1307 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
-58 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

967 
WWUS45 KSLC 150911
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
211 AM MST Wed Feb 15 2023

UTZ124-160000-
/O.NEW.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Zion National Park-
Including the city of Springdale
211 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM
MST THURSDAY...

* WHAT...For the first Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 15 below zero. For the second 
  Wind Chill Warning, dangerously cold wind chills expected. 
  Wind chills as low as 10 below zero. For the Winter Weather 
  Advisory, snow. Additional snow accumulations of up to one 
  inch. Winds gusting as high as 55 mph.

* WHERE...Zion National Park.

* WHEN...For the first Wind Chill Warning, until 10 AM MST this 
  morning. For the second Wind Chill Warning, from 11 PM this 
  evening to 9 AM MST Thursday. For the Winter Weather Advisory, 
  until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing snow
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ129-160000-
/O.NEW.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
211 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM
MST THURSDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills expected. Wind chills as low as 15 below zero. For the 
  Winter Weather Advisory, snow. Additional snow accumulations 
  of up to two inches. Winds gusting as high as 50 mph.

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...For the Wind Chill Warning, from 11 PM this evening to 
  9 AM MST Thursday. For the Winter Weather Advisory, until 5 PM 
  MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing snow
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ127-160000-
/O.NEW.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
Bryce Canyon Country-
Including the city of Bryce Canyon City
211 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM
MST THURSDAY...

* WHAT...For the first Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 20 below zero. For the second 
  Wind Chill Warning, dangerously cold wind chills expected. 
  Wind chills as low as 25 below zero.

* WHERE...Bryce Canyon Country.

* WHEN...For the first Wind Chill Warning, until 10 AM MST this 
  morning. For the second Wind Chill Warning, from 11 PM this 
  evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on exposed
  skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ131-160000-
/O.CON.KSLC.WS.W.0007.000000T0000Z-230216T0000Z/
Glen Canyon Recreation Area/Lake Powell-
Including the cities of Big Water and Bullfrog
211 AM MST Wed Feb 15 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Glen Canyon Recreation Area/Lake Powell.

* WHEN...Until 5 PM MST Wednesday.

* IMPACTS...Travel could be very difficult.

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.

&&

$$

UTZ107-151700-
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
Cache Valley/Utah Portion-
Including the cities of Logan and Smithfield
211 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 20 
  below zero for Bryce Canyon Country, and as low as 10 below 
  zero in the Cache Valley.

* WHERE...Cache Valley/Utah Portion and Bryce Canyon Country.

* WHEN...Until 10 AM MST Wednesday.

* IMPACTS...The cold wind chills could result in hypothermia if 
  precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ117-125-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
211 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of 1 to 4 inches. 
  Winds gusting as high as 50 mph.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 5 PM MST Wednesday.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility. The cold wind 
  chills as low as 20 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$

UTZ116-122-128-130-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-South Central Utah-
Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, Kanab, Escalante, and Hanksville
211 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to 2 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Eastern Juab/Millard Counties, Southwest Utah, South 
  Central Utah, Capitol Reef National Park and Vicinity and 
  Western Canyonlands.

* WHEN...Until 5 PM MST Wednesday.

* 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.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
6 follow-up statements
098 
WWUS45 KSLC 151339
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
639 AM MST Wed Feb 15 2023

UTZ124-160000-
/O.CAN.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Zion National Park-
Including the city of Springdale
639 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...For the Wind Chill Warnings, dangerously cold wind
  chills. Wind chills as low as 15 below zero in higher elevations
  of Zion National Park. For lower elevations of the park such as
  near the park entrance, wind chills as low as 5 degrees above 
  zero. 

* WHERE...Zion National Park.

* WHEN...For the first Wind Chill Warning, until 10 AM MST this 
  morning. For the second Wind Chill Warning, from 11 PM this 
  evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on exposed
  skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ128-151445-
/O.CAN.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
South Central Utah-
Including the cities of Kanab and Escalante
639 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY IS CANCELLED...

Snowfall has largely ended across south central Utah, thus the
Advisory is cancelled. However, a few slick spots along with areas
of patchy blowing snow may still be encountered, especially this
morning and across higher elevation areas. 

$$

UTZ129-160000-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
639 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind chills
  expected. Wind chills as low as 15 below zero. For the Winter
  Weather Advisory, snow. Additional snow accumulations of up to
  two inches. 

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...For the Wind Chill Warning, from 11 PM this evening to 
  9 AM MST Thursday. For the Winter Weather Advisory, until 5 PM 
  MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing snow
  could significantly reduce visibility. The cold wind chills 
  could cause frostbite on exposed skin in as little as 30 
  minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ127-160000-
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Bryce Canyon Country-
Including the city of Bryce Canyon City
639 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...For the first Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 20 below zero. For the second 
  Wind Chill Warning, dangerously cold wind chills expected. 
  Wind chills as low as 25 below zero.

* WHERE...Bryce Canyon Country.

* WHEN...For the first Wind Chill Warning, until 10 AM MST this 
  morning. For the second Wind Chill Warning, from 11 PM this 
  evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ131-160000-
/O.CON.KSLC.WS.W.0007.000000T0000Z-230216T0000Z/
Glen Canyon Recreation Area/Lake Powell-
Including the cities of Big Water and Bullfrog
639 AM MST Wed Feb 15 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Glen Canyon Recreation Area/Lake Powell.

* WHEN...Until 5 PM MST Wednesday.

* IMPACTS...Travel could be very difficult. Patchy blowing snow
  may reduce visibility. 

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.

&&

$$

UTZ107-151700-
/O.CON.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
Cache Valley/Utah Portion-
Including the cities of Logan and Smithfield
639 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 10 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills as low as 10 below zero in 
  the Cache Valley.

* WHERE...Cache Valley/Utah Portion.

* WHEN...Until 10 AM MST Wednesday.

* IMPACTS...The cold wind chills could result in hypothermia if 
  precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ117-125-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
639 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches. 
  Winds gusting as high as 50 mph.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 5 PM MST Wednesday.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow could significantly reduce visibility.

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.

&&

$$

UTZ116-122-130-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, and Hanksville
639 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to 2 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Eastern Juab/Millard Counties, Southwest Utah, South
  Central Utah and Western Canyonlands.

* WHEN...Until 5 PM MST Wednesday.

* 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.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
711 
WWUS45 KSLC 151659
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
959 AM MST Wed Feb 15 2023

UTZ124-127-160100-
/O.EXP.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Zion National Park-Bryce Canyon Country-
Including the cities of Springdale and Bryce Canyon City
959 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...
...WIND CHILL WARNING WILL EXPIRE AT 10 AM MST THIS MORNING...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 25 below zero.

* WHERE...Zion National Park and Bryce Canyon Country.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ107-151800-
/O.EXP.KSLC.WC.W.0004.000000T0000Z-230215T1700Z/
Cache Valley/Utah Portion-
Including the cities of Logan and Smithfield
959 AM MST Wed Feb 15 2023

...WIND CHILL WARNING WILL EXPIRE AT 10 AM MST THIS MORNING...

The period favoring the coldest wind chills has passed, therefore,
the warning will expire. Another round of cold wind chills are
expected Thursday morning, but these temperatures will not meet
warning criteria.

$$

UTZ129-160100-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
959 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills expected. Wind chills as low as 15 below zero. For the 
  Winter Weather Advisory, snow. Additional snow accumulations 
  of up to one inch. Winds gusting as high as 40 mph.

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...For the Wind Chill Warning, from 11 PM this evening to 
  9 AM MST Thursday. For the Winter Weather Advisory, until 5 PM 
  MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ131-160000-
/O.CON.KSLC.WS.W.0007.000000T0000Z-230216T0000Z/
Glen Canyon Recreation Area/Lake Powell-
Including the cities of Big Water and Bullfrog
959 AM MST Wed Feb 15 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

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

* WHERE...Glen Canyon Recreation Area/Lake Powell.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

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.

&&

$$

UTZ117-125-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
959 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to one inch. 
  Winds gusting as high as 50 mph.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility. The cold wind 
  chills as low as 20 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$

UTZ116-122-130-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, and Hanksville
959 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to one inch. 
  Winds gusting as high as 45 mph.

* WHERE...Eastern Juab/Millard Counties, Southwest Utah and 
  Western Canyonlands.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

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.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
155 
WWUS45 KSLC 151736
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
1036 AM MST Wed Feb 15 2023

UTZ129-160145-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
1036 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills expected. Wind chills as low as 15 below zero. For the 
  Winter Weather Advisory, snow. Additional snow accumulations 
  of up to one inch. Winds gusting as high as 40 mph.

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...For the Wind Chill Warning, from 11 PM this evening to 
  9 AM MST Thursday. For the Winter Weather Advisory, until 5 PM 
  MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ131-160000-
/O.CON.KSLC.WS.W.0007.000000T0000Z-230216T0000Z/
Glen Canyon Recreation Area/Lake Powell-
Including the cities of Big Water and Bullfrog
1036 AM MST Wed Feb 15 2023

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

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

* WHERE...Glen Canyon Recreation Area/Lake Powell.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

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.

&&

$$

UTZ124-127-160145-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Zion National Park-Bryce Canyon Country-
Including the cities of Springdale and Bryce Canyon City
1036 AM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...Dangerously cold wind chills expected. Wind chills as low
  as 15 below zero for the upper elevations of Zion National Park
  and 5 degrees for the lower elevations. For the Bryce Canyon
  area, wind chills as low as 25 below zero.

* WHERE...Zion National Park and Bryce Canyon Country.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ117-125-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
1036 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow and blowing snow. Additional snow accumulations of 
  up to one inch. Winds gusting as high as 50 mph.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility. The cold wind 
  chills as low as 20 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$

UTZ116-122-130-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, and Hanksville
1036 AM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow and blowing snow. Additional snow accumulations of 
  up to one inch. Winds gusting as high as 45 mph.

* WHERE...Eastern Juab/Millard Counties, Southwest Utah and 
  Western Canyonlands.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

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.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
686 
WWUS45 KSLC 151906
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
1206 PM MST Wed Feb 15 2023

UTZ131-152015-
/O.CAN.KSLC.WS.W.0007.000000T0000Z-230216T0000Z/
Glen Canyon Recreation Area/Lake Powell-
Including the cities of Big Water and Bullfrog
1206 PM MST Wed Feb 15 2023

...WINTER STORM WARNING IS CANCELLED...

The period favoring the heaviest snow and greatest impacts has
passed, therefore the winter storm warning has been cancelled.
Area of light snowfall and patchy blowing snow will still be
possible through the afternoon, mainly along SR-276 near Bullfrog
and SR-95 through Hite. 

$$

UTZ129-160315-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
1206 PM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind chills
  expected. Wind chills as low as 15 below zero. For the Winter
  Weather Advisory, snow and blowing snow. Additional snow 
  accumulations of up to one inch. Winds gusting as high as 40 
  mph.

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...For the Wind Chill Warning, from 11 PM this evening to 
  9 AM MST Thursday. For the Winter Weather Advisory, until 5 PM 
  MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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.

&&

$$

UTZ124-127-160315-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Zion National Park-Bryce Canyon Country-
Including the cities of Springdale and Bryce Canyon City
1206 PM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 15 below zero for the upper elevations of Zion National 
  Park and 5 degrees for the lower elevations. For the Bryce 
  Canyon area, wind chills as low as 25 below zero.

* WHERE...Zion National Park and Bryce Canyon Country.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ117-125-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
1206 PM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow and blowing snow. Additional snow accumulations of 
  up to one inch. Winds gusting as high as 50 mph.

* WHERE...Central Mountains and Southern Mountains.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility. The cold wind 
  chills as low as 20 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

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.

&&

$$

UTZ116-122-130-160000-
/O.CON.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, and Hanksville
1206 PM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow and blowing snow. Additional snow accumulations of 
  up to one inch. Winds gusting as high as 45 mph.

* WHERE...Eastern Juab/Millard Counties, Southwest Utah and 
  Western Canyonlands.

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions. Patchy blowing 
  snow could significantly reduce visibility.

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.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
099 
WWUS45 KSLC 152357
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
457 PM MST Wed Feb 15 2023

UTZ129-161200-
/O.EXP.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Capitol Reef National Park and Vicinity-
Including the cities of Loa and Torrey
457 PM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

* WHAT...Dangerously cold wind chills expected. Wind chills as low
  as 10 below zero.

* WHERE...Capitol Reef National Park and Vicinity.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The dangerously cold wind chills could result in 
  hypothermia or frostbite if precautions are not taken.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ117-125-160100-
/O.EXP.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Central Mountains-Southern Mountains-
Including the cities of Cove Fort, Fish Lake, Joes Valley, 
Brian Head, and Alton
457 PM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

Snow has diminished across the central and southern mountains of
Utah this evening. Little or no additional accumulation is
expected. However, occasional blowing snow may remain possible 
through the evening hours in exposed areas.

$$

UTZ116-122-130-160100-
/O.EXP.KSLC.WW.Y.0011.000000T0000Z-230216T0000Z/
Eastern Juab/Millard Counties-Southwest Utah-Western Canyonlands-
Including the cities of Nephi, Scipio, Fillmore, Beaver, 
Cedar City, Milford, and Hanksville
457 PM MST Wed Feb 15 2023

...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

Snow has diminished across eastern Juab and Millard Counties,
and across southwest Utah and western Canyonlands this evening. 
Little or no additional accumulation is expected. However, 
occasional blowing snow may remain possible through the evening 
hours in exposed areas.

$$

UTZ124-127-161200-
/O.CON.KSLC.WC.W.0005.230216T0600Z-230216T1600Z/
Zion National Park-Bryce Canyon Country-
Including the cities of Springdale and Bryce Canyon City
457 PM MST Wed Feb 15 2023

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 9 AM MST THURSDAY...

* WHAT...Dangerously cold wind chills expected. Wind chills as low
  as 25 below zero are expected in Bryce Canyon Country, 5 below
  zero for the upper elevations of Zion National Park, and 5 above
  zero for the lower elevations of Zion National Park.

* WHERE...Zion National Park and Bryce Canyon Country.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves.

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx
756 
WWUS45 KSLC 160750
WSWSLC

URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
1250 AM MST Thu Feb 16 2023

UTZ109-161600-
/O.EXA.KSLC.WC.W.0005.000000T0000Z-230216T1600Z/
Bear Lake and Bear River Valley-
Including the cities of Woodruff, Randolph, and Garden City
1250 AM MST Thu Feb 16 2023

...WIND CHILL WARNING IN EFFECT UNTIL 9 AM MST THIS MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 35 
  below zero.

* WHERE...Bear Lake and Bear River Valley. Coldest in the valley
  from Randolph to Woodruff.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The dangerously cold wind chills could result in 
  hypothermia or frostbite if precautions are not taken.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

UTZ124-127-129-161600-
/O.CON.KSLC.WC.W.0005.000000T0000Z-230216T1600Z/
Zion National Park-Bryce Canyon Country-
Capitol Reef National Park and Vicinity-
Including the cities of Springdale, Bryce Canyon City, Loa, 
and Torrey
1250 AM MST Thu Feb 16 2023

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills expected. Wind chills as 
  low as 25 below zero are expected in Bryce Canyon Country, 5 
  below zero for the upper elevations of Zion National Park, and 
  5 above zero for the lower elevations of Zion National Park.

* WHERE...Zion National Park and Bryce Canyon Country.

* WHEN...From 11 PM this evening to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

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

For information on potential travel impacts visit...
http://udottraffic.utah.gov/roadweatherforecast.aspx

What forecasters said that day

The local office's own words before this wind chill warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this wind chill warning went out at Feb 14, 4:26 PM MST, 9 hours 45 minutes earlier.

Area forecast discussion, Feb 14, 4:26 PM MST, 9 hours 45 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
426 PM MST Tue Feb 14 2023

.SYNOPSIS...A cold front will continue to push south and east
through the area through the remainder of the evening, with snow
tapering off overnight for many areas. Areas of strong winds are
expected to develop across portions of northern, west-central,
and southern Utah tonight through tomorrow as the storm system
departs the region. High pressure rebuilds over the eastern Great
Basin by Thursday, with another potential storm system lined up
for late this weekend/ early next week.

&&

.SHORT TERM (Through 12Z/5AM Thursday)...Afternoon water vapor
satellite imagery reveals a very evident area of stout lift over
the southern half of Utah, coincident with a cold frontal boundary
that has been producing fairly widespread moderate to heavy
snowfall across central and southern Utah. The base of the
associated trough appears to already be rounding the southern
Great Basin, which will help the progression of the aforementioned
frontal boundary. The moderate to heavy snowfall tied to the
boundary will continue to push eastward into the Glen Canyon
National Recreation area this evening. Behind this boundary,
widespread areas of light stratiform snowfall are noted on radar.
Overall, expecting this area of light snowfall to continue across
southern and central Utah through the evening hours, eventually
shifting eastward / dissipating as subsidence increases into
tomorrow morning. That said, there will be enough low level
moisture and flow perpendicular to terrain to keep light mountain
snowfall going through at least Wednesday afternoon for portions
of central and southern Utah

For northern Utah, areas of light snow showers remain in place as
the mid-level instability axis moves through this portion of the
forecast area. While daytime heating is still a thing, expect
these isolated to scattered snow showers to continue. Once daytime
heating is lost, nearly all chances for snowfall in northern Utah/
southwest WY will diminish.

The bigger story shifts toward the wind forecast as we head into
the early morning hours tomorrow for multiple areas across Utah.
While the base of the trough makes its way through southern Utah,
an easterly component to the 700mb flow will increase across
northern Utah where around 30-35kts of cross barrier flow are
noted on the deterministic GFS between about 2AM and 5AM.
Additionally, colder H7 temperatures to the east of the terrain
will also help to promote low level cold air advection. This alone
raises the concern for enhanced canyon winds in Salt Lake, Davis,
and Weber County. Have maintained existing wind advisories for
these areas, but have kept wind forecasts on the lower end of
advisory because we do lack a substantial surface pressure
gradient between southwest WY and Ogden (which really helps to
force the winds through the terrain). There is potential for this
wind forecast to flop if a near surface stable layer develops
overnight.

For the western portions of Utah, model guidance continues to
support strong northerly 700mb flow during the day tomorrow. This,
combined with the well mixed post-frontal atmosphere and a modest
surface pressure gradient will help areas in the western portions
of the state see wind gusts around the 45 mph mark. Have issued a
wind advisory for west-central Utah from 5AM to 5PM tomorrow, with
the biggest impact being northerly cross winds on east-west
oriented routes (i.e. US-50/US-6 from Santaquin through the UT/NV
border).

Lastly, the strong northerly component to the 700mb flow tomorrow
will be in alignment with the I-15 corridor, helping to force
stronger winds through this section of the interstate between
Cedar City and St. George. Combined with the aforementioned
surface pressure gradient, thinking that we'll manage to see wind
gusts exceed the 45 mph mark, but fall short of 60 mph. Have
upgraded the existing High Wind Watch to a Wind Advisory for lower
Washington County, with the greatest impacts expected near Leeds,
Hurricane, and Toquerville. These winds are expected to increase
in speed overnight tonight, persisting through much of the day
tomorrow, then diminishing as we head into the evening hours.

The cold airmass will remain in place through Thursday morning,
meaning that some of the coldest temperatures of the week are
likely to be observed for much of the forecast area.

.LONG TERM (After 12Z/5AM Thursday)...A cold, dry northerly flow
will be in place across southwest Wyoming and Utah Thursday morning.
Models are in good agreement on a closed low entering the plains,
while upstream ridging builds into the PacNW. With a mostly clear
night, recent snow, and light winds, temperatures Thursday morning
will likely be the coldest of the week. Forecast lows are below zero
for southwest Wyoming, the Cache Valley, Bear River Valley, and for
Bryce Canyon. Almost all of Utah that doesn't get below zero will
dip into the single digits or teens.

There is high confidence that the aforementioned ridge will track
into Utah Thursday, with the axis crossing Friday morning. Although
it is the very end of the season, valley inversions will establish,
likely strongest in the Cache Valley and Uinta Basin.

Ensembles are in good agreement with a closed low breaking off near
the California coast Friday. The general agreement is that it will
linger off the coast into next week, resulting in a split flow for
the southwest. Locally, that will allow for largely dry conditions
through Saturday as temperatures warm closer to normal.

A grazing shortwave trough to the northeast Sunday could bring light
snow to southwest Wyoming and far northern Utah. EPS and GEFS
members are very light on amounts, even for the mountains, as
dynamics and moisture are expected to be limited.

Better chances for snow are expected into next week, but there is
more variance within ensemble guidance and more uncertainty on
details. Slightly more than 50% of ensemble members bring a longwave
trough into Utah Monday. More members bring the trough in Tuesday,
with around 75% of all members with better forcing and moisture
either Monday or Tuesday. An alternate scenario, with around 25% of
members, have the longwave trough digging further to the east.

&&

.AVIATION...KSLC...VFR conditions expected. Isolated snow showers
possible until ~06Z. Brief drops in visibility will be possible if a
snow shower is overhead. Northwest winds expected for TAF period.
There is a chance that gusty northeast winds will be possible
overnight. These gusty northwest to northeast winds are expected to
subside by mid-morning. Mountain obscuration possible through
Wednesday morning.

.REST OF UTAH AND SOUTHWEST WYOMING...Gusty northwest to northeast
winds expected, with the strongest gusts occurring in the early to
mid-morning hours on Wednesday. Light snow showers possible in
northern Utah and southwest Wyoming through the early evening.
Southern and eastern Utah will see snow into the early morning
hours. Lowered flight categories are expected when snow is occurring
due to lowered visibilities and CIGS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Wind Advisory from 2 AM to 8 AM MST Wednesday for UTZ104-105.

     Wind Chill Warning from 10 PM this evening to 10 AM MST
     Wednesday for UTZ107-124-127.

     Wind Advisory from 5 AM to 5 PM MST Wednesday for UTZ115.

     Winter Weather Advisory until 5 PM MST Wednesday for UTZ116-117-
     122-124-125-128>130.

     Wind Advisory from 11 PM this evening to 5 PM MST Wednesday for
     UTZ123.

     Winter Storm Warning until 5 PM MST Wednesday for UTZ131.

WY...None.
&&

Webber / Wilson / Cecava

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

Nearby

Wind Chill Warnings in Utah, 2023Every wind chill warning in 2023

Sources

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