Alert archive / Texas / Wind Chill Advisories in 2021

Wind Chill Advisory 1, NWS Amarillo, TX

February 12, 202114 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this wind chill advisory at Feb 12, 2021, 3:13 AM CST for 14 counties in Texas; Beaver County, Cimarron County, Texas County, Oklahoma. It took effect at Feb 12, 2021, 5:00 AM CST. It was in force for 31 hr.

The area

The counties it named.

The facts

Issued
Feb 12, 2021, 3:13 AM CST (09:13 UTC)
In effect from
Feb 12, 2021, 5:00 AM CST
Expired
Feb 13, 2021, 12:00 PM CST
In force
31 hr
Issued by
NWS Amarillo, TX

Counties Beaver County, OK, Cimarron County, OK, Texas County, OK, Carson County, TX, Dallam County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Potter County, TX, Roberts County, TX, Sherman County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 94 km from the middle of the area, began a volume at 09:15 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 9.2 hours before the alert went out and 94 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, Amarillo Airport, TX at 00:00Z on 2021-02-12Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 00:00Z on 2021-02-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 105 square meters per square second.1939Sfc1 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
1372 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
105 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

536 
WWUS44 KAMA 120913
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
313 AM CST Fri Feb 12 2021

OKZ001>003-TXZ003>005-121700-
/O.NEW.KAMA.WC.Y.0001.210212T1100Z-210213T1800Z/
/O.NEW.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Cimarron-Texas-Beaver-Hansford-Ochiltree-Lipscomb-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Spearman, Gruver, Perryton, Booker, Higgins, and Follett
313 AM CST Fri Feb 12 2021

...WIND CHILL ADVISORY IN EFFECT UNTIL NOON CST SATURDAY...
...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH
MONDAY MORNING...

* WHAT...For the Wind Chill Advisory, very cold wind chills
  expected. Wind chills as low as 14 below zero. For the Winter
  Storm Watch, heavy snow possible and dangerous wind chill
  values. Total snow accumulations of 5 to 8 inches possible. 
  Wind chill values as low as 25 below zero. 

* WHERE...All of the Oklahoma Panhandle and the northeast Texas
  Panhandle.

* WHEN...For the Wind Chill Advisory, until noon CST Saturday. 
  For the Winter Storm Watch, from late Saturday night through 
  Monday morning.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  cold wind chills could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

Monitor the latest forecasts for updates on this situation. 

&&

$$

TXZ001-002-006>010-012>015-121700-
/O.NEW.KAMA.WC.Y.0001.210212T1100Z-210212T1700Z/
/O.NEW.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Dallam-Sherman-Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-
Carson-Gray-Wheeler-
Including the cities of Dalhart, Stratford, Hartley, Channing, 
Dumas, Borger, Miami, Canadian, Amarillo, Panhandle, White Deer, 
Pampa, Shamrock, and Wheeler
313 AM CST Fri Feb 12 2021

...WIND CHILL ADVISORY IN EFFECT UNTIL 11 AM CST THIS MORNING...
...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH
MONDAY MORNING...

* WHAT...For the Wind Chill Advisory, very cold wind chills
  expected. Wind chills as low as 7 below zero. For the Winter
  Storm Watch, heavy snow possible and dangerous wind chill
  values. Total snow accumulations of 6 to 9 inches possible. Wind
  chill values as low as 25 below zero.

* WHERE...Portions of the Texas Panhandle.

* WHEN...For the Wind Chill Advisory, until 11 AM CST this 
  morning. For the Winter Storm Watch, from late Saturday night 
  through Monday morning.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  cold wind chills could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

Monitor the latest forecasts for updates on this situation. 

&&

$$

TXZ011-016>020-317-121700-
/O.NEW.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
313 AM CST Fri Feb 12 2021

...WINTER STORM WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH
MONDAY MORNING...

* WHAT...Heavy snow possible and dangerous wind chill values.
  Total snow accumulations of 6 to 9 inches possible. Wind chill
  values as low as 20 below zero.

* WHERE...Southern Texas Panhandle.

* WHEN...From late Saturday night through Monday morning.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the morning commute. The cold wind chills as low as
  25 below zero could cause frostbite on exposed skin in as little
  as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$
5 follow-up statements
033 
WWUS44 KAMA 121659
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
1059 AM CST Fri Feb 12 2021

TXZ001-002-006>010-012>015-130200-
/O.EXT.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
/O.CON.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Dallam-Sherman-Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-
Carson-Gray-Wheeler-
Including the cities of Dalhart, Stratford, Hartley, Channing, 
Dumas, Borger, Miami, Canadian, Amarillo, Panhandle, White Deer, 
Pampa, Shamrock, and Wheeler
1059 AM CST Fri Feb 12 2021

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL NOON CST SATURDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT
THROUGH MONDAY MORNING...

* WHAT...For the Wind Chill Advisory, very cold wind chills
  expected. Wind chills as low as 10 below zero. For the Winter 
  Storm Watch, heavy snow possible and dangerous wind chill 
  values. Total snow accumulations of 6 to 9 inches possible. Wind
  chill values as low as 25 below zero.

* WHERE...Portions of the Texas Panhandle.

* WHEN...For the Wind Chill Advisory, until noon CST Saturday. 
  For the Winter Storm Watch, from late Saturday night through 
  Monday morning.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  cold wind chills could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

Monitor the latest forecasts for updates on this situation.

&&

$$

OKZ001>003-TXZ003>005-130200-
/O.CON.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
/O.CON.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Cimarron-Texas-Beaver-Hansford-Ochiltree-Lipscomb-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Spearman, Gruver, Perryton, Booker, Higgins, and Follett
1059 AM CST Fri Feb 12 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST
SATURDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT
THROUGH MONDAY MORNING...

* WHAT...For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills as low as 14 below zero. For the Winter 
  Storm Watch, heavy snow possible and dangerous wind chill 
  values. Total snow accumulations of 5 to 8 inches possible. 
  Wind chill values as low as 25 below zero.

* WHERE...All of the Oklahoma Panhandle and the northeast Texas 
  Panhandle.

* WHEN...For the Wind Chill Advisory, until noon CST Saturday. 
  For the Winter Storm Watch, from late Saturday night through 
  Monday morning.

* IMPACTS...Travel could be very difficult. Patchy blowing snow 
  could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  cold wind chills could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

Monitor the latest forecasts for updates on this situation.

&&

$$

TXZ011-016>020-317-130200-
/O.CON.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
1059 AM CST Fri Feb 12 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT
THROUGH MONDAY MORNING...

* WHAT...Heavy snow possible and dangerous wind chill values. 
  Total snow accumulations of 6 to 9 inches possible. Wind chill 
  values as low as 20 below zero.

* WHERE...Southern Texas Panhandle.

* WHEN...From late Saturday night through Monday morning.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills as low as 25 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$
838 
WWUS44 KAMA 122056
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
256 PM CST Fri Feb 12 2021

OKZ001>003-TXZ001>010-012>015-130500-
/O.UPG.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
/O.NEW.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
/O.CON.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-Carson-Gray-
Wheeler-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Dalhart, Stratford, Spearman, Gruver, Perryton, Booker, 
Higgins, Follett, Hartley, Channing, Dumas, Borger, Miami, 
Canadian, Amarillo, Panhandle, White Deer, Pampa, Shamrock, 
and Wheeler
256 PM CST Fri Feb 12 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST
SATURDAY...
...WINTER STORM WARNING IN EFFECT FROM 6 PM SATURDAY TO NOON CST
MONDAY...

* WHAT...For the Winter Storm Warning, heavy snow expected. Total
  snow accumulations of 5 to 10 inches. Winds chills as low as 
  -15 to -30 degrees. For the Wind Chill Advisory, very cold wind
   chills. Wind chills as low as 15 degrees below zero.

* WHERE...Portions of the Panhandle of Oklahoma and the 
  Panhandle of Texas.

* WHEN...For the Winter Storm Warning, from 6 PM Saturday to 
  noon CST Monday. For the Wind Chill Advisory, until noon CST 
  Saturday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the morning or evening commute. The cold wind
  chills could cause frostbite on exposed skin in as little as 30
  minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

TXZ011-016>020-317-130500-
/O.UPG.KAMA.WS.A.0001.210214T0600Z-210215T1800Z/
/O.NEW.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
256 PM CST Fri Feb 12 2021

...WINTER STORM WARNING IN EFFECT FROM 6 PM SATURDAY TO NOON CST
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches. Winds chills as low as -15 to -30 degrees.

* WHERE...Southern Texas Panhandle.

* WHEN...From 6 PM Saturday to noon CST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the morning commute. The cold wind chills as low as
  25 below zero could cause frostbite on exposed skin in as little
  as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
336 
WWUS44 KAMA 130433
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
1033 PM CST Fri Feb 12 2021

OKZ001>003-TXZ001>010-012>015-131300-
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
/O.CON.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-Carson-Gray-
Wheeler-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Dalhart, Stratford, Spearman, Gruver, Perryton, Booker, 
Higgins, Follett, Hartley, Channing, Dumas, Borger, Miami, 
Canadian, Amarillo, Panhandle, White Deer, Pampa, Shamrock, 
and Wheeler
1033 PM CST Fri Feb 12 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST
SATURDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM SATURDAY TO
NOON CST MONDAY...

* WHAT...For the Winter Storm Warning, heavy snow expected. Total
  snow accumulations of 5 to 10 inches. Winds chills as low as
  minus 15 to minus 30 degrees. For the Wind Chill Advisory, very
  cold wind chills. Wind chills as low as 15 degrees below zero.

* WHERE...All of the Oklahoma Panhandle and much of the Texas
  Panhandle.

* WHEN...For the Winter Storm Warning, from 6 PM Saturday to 
  noon CST Monday. For the Wind Chill Advisory, until noon CST 
  Saturday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute. The 
  cold wind chills could cause frostbite on exposed skin in as 
  little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Use caution while outside. Wear appropriate clothing, a hat, and 
gloves.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

TXZ011-016>020-317-131300-
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
1033 PM CST Fri Feb 12 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM SATURDAY TO
NOON CST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8
  inches. Winds chills as low as minus 15 to minus 30 degrees.

* WHERE...The southern Texas Panhandle.

* WHEN...From 6 PM Saturday to noon CST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the morning commute. The cold wind chills could 
  cause frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Use caution while outside. Wear appropriate clothing, a hat, and 
gloves.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

02
142 
WWUS44 KAMA 130758
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
158 AM CST Sat Feb 13 2021

OKZ001>003-TXZ001>010-012>015-131800-
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
/O.CON.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-Carson-Gray-
Wheeler-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Dalhart, Stratford, Spearman, Gruver, Perryton, Booker, 
Higgins, Follett, Hartley, Channing, Dumas, Borger, Miami, 
Canadian, Amarillo, Panhandle, White Deer, Pampa, Shamrock, 
and Wheeler
158 AM CST Sat Feb 13 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST MONDAY...

* WHAT...For the Winter Storm Warning, heavy snow expected. Total
  snow accumulations of 6 to 9 inches. Wind chills as low as 15 to
  30 degrees below zero. For the Wind Chill Advisory, very cold 
  wind chills. Wind chills as low as 5 to 14 degrees below zero.

* WHERE...All of the Oklahoma Panhandle and much of the Texas 
  Panhandle.

* WHEN...For the Winter Storm Warning, from 6 PM Saturday to 
  noon CST Monday. For the Wind Chill Advisory, until noon CST 
  Saturday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could cause frostbite on exposed skin in as little as 
  30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

TXZ011-016>020-317-131800-
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
158 AM CST Sat Feb 13 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 9
  inches. Winds chills as low as 15 to 30 degrees below zero.

* WHERE...The southern Texas Panhandle.

* WHEN...From 6 PM Saturday to noon CST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills as low as 30 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$
011 
WWUS44 KAMA 131811
WSWAMA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Amarillo TX
1211 PM CST Sat Feb 13 2021

OKZ001>003-TXZ001>010-012>015-140215-
/O.EXP.KAMA.WC.Y.0001.000000T0000Z-210213T1800Z/
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Potter-Carson-Gray-
Wheeler-
Including the cities of Boise City, Keyes, Guymon, Beaver, 
Forgan, Dalhart, Stratford, Spearman, Gruver, Perryton, Booker, 
Higgins, Follett, Hartley, Channing, Dumas, Borger, Miami, 
Canadian, Amarillo, Panhandle, White Deer, Pampa, Shamrock, 
and Wheeler
1211 PM CST Sat Feb 13 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST MONDAY...
...WIND CHILL ADVISORY HAS EXPIRED...

* WHAT...For the Winter Storm Warning, Heavy snow expected. Total
  snow accumulations of 4 to 7 inches. Wind chills as low as 15 to
  30 degrees below zero.

* WHERE...All of the Oklahoma Panhandle and much of the Texas 
  Panhandle.

* WHEN...From 6 PM Tonight to noon CST Monday.
  

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills as low as 30 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

TXZ011-016>020-317-140215-
/O.CON.KAMA.WS.W.0001.210214T0000Z-210215T1800Z/
Oldham-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
Including the cities of Vega, Hereford, Canyon, Claude, 
Clarendon, Wellington, and Palo Duro Canyon
1211 PM CST Sat Feb 13 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches. Winds chills as low as 15 to 30 degrees below zero.

* WHERE...The southern Texas Panhandle.

* WHEN...From 6 PM Tonight to noon CST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills as low as 30 below zero could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

What forecasters said that day

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

NWS Amarillo, TX wrote its last area forecast discussion before this wind chill advisory went out at Feb 11, 10:50 PM CST, 4 hours 23 minutes earlier.

Area forecast discussion, Feb 11, 10:50 PM CST, 4 hours 23 minutes before
Area Forecast Discussion...UPDATED
National Weather Service Amarillo TX
1050 PM CST Thu Feb 11 2021

.AVIATION...
For the 06Z TAFs, expect either IFR or MVFR cigs to prevail at the
terminal sites for the duration of this fcst cycle. Confidence is
low regarding freezing fog development through Friday morning.
There is some potential, but where and when is problematic.
Therefore, have omitted this weather element from this fcst.
Trends will be monitored. Also, some snow flurries are possible
at any of the terminal sites. Again, will handle with amendments
if necessary due to uncertainty in both timing and location.

02

&&

.PREV DISCUSSION... /Issued 549 PM CST Thu Feb 11 2021/

AVIATION...
For the 00Z TAFs, expect KGUY to remain in MVFR cigs through this
fcst cycle, while MVFR cigs return to both KDHT and KAMA later
tonight and persist through the end of this fcst cycle. Confidence
is low in freezing fog development tonight and Friday morning.
There is some potential, but where and when is problematic.
Therefore, have omitted this weather element from this fcst. Will
continue to monitor trends this evening. Also, some snow flurries
are possible at any of the terminal sites. Again, will handle with
amendments due to uncertainty in both timing and location.

02

PREV DISCUSSION... /Issued 306 PM CST Thu Feb 11 2021/

SHORT TERM...Tonight through Saturday...

Cold air remains in place today, but most areas will clear out for a
couple hours at least.  Highs may touch the low 30s in areas that
clear out for several hours, with 20s in other areas. Low clouds
will return tonight, and there may be some patch freezing fog. Right
now very shallow saturated layer just above the surface with light
winds, could lead to industrial light snow for the Borger/Amarillo
area, but the better chance of that to occur and possibly accumulate
would be Friday night into Saturday. That being said, pops have been
modified in the localized Borger/Amarillo, area to account for the
industrial snow potential, and we've even gone with snow
accumulation amounts around an inch.

Tonight, the temperatures will get down to the single digits and
be close to zero in the north, but the wind chills in the northern
TX Panhandle and the OK Panhandle will get down in the negative 5
to negative 10 range. Overall the winds will be just light enough
to keep us out of Wind Chill Advisory range, even though the wind
chill temperatures will be cold enough. If winds are adjusted up
even a few MPH that may trigger an Advisory. As we move into late
Saturday afternoon and evening the flow will shift more westerly,
before the next system dives down and brings the significant
impacts Saturday night through Monday.

Weber

LONG TERM...Saturday Night through Wednesday...
The upper level closed low will still reside north of the Great
Lakes in Canada. The Pacific Northwest trough will now be over
Utah by Saturday night and will cross over West Texas by Monday
morning. Latest model runs have started to dig the trough further
south with the higher QPF amounts in Lubbock and Midland's areas.
This continues to become a concern as the system makes its way
onshore tonight with observations becoming ingested into the model
runs.

Based on some of the soundings across the Panhandles, the snow
ratios are likely going to be as high as 20:1. Therefore the
current forecasts trends the NBM snow ratios higher, which further
adjusts the snowfall totals just a bit higher as well.
Temperatures are not a problem with this system, but mainly the
moisture source and how long the deep saturation into the
dendritic growth zone will last before dry air filters in behind
the system. Some isentropic lifting is present and will provide
the best source of additional dynamics on Sunday. Light to
moderate snowfall is expected to begin as early as Saturday
evening and continue through late Monday morning with no major
snowbanding expected at this time. However, confidence is high
that most of the Panhandles will see a few inches of snow with a
potential of widespread amounts of 5 to 7 inches. Again, these
amounts may be cut in half if this system dives further south with
the main moisture source.

Following this system is yet another trough digging in from the
Pacific northwest with the chance for more moisture in the
Panhandles. Models are starting to dive this system further south
as it crosses the Panhandles Wednesday. The main moisture will be
ahead of the system and bring another shot of snow to the
Panhandles Tuesday night into Wednesday. Models are fairly
consistent with this second system and looking through the
soundings across West Texas, there is a chance the deeper moisture
will be south of the area. This system will continue to be
monitored closely following the first system.

The story remains the same when it comes to the arctic air mass
making its way into the Panhandles. The coldest temperatures are
expected Sunday through Tuesday with wind chills ranging from -15
to -25 across the area. Temperatures on Sunday will be a bit
tricky with the potential snowfall and cloudy conditions with
little warming. Models are hinting at the high for Sunday
occurring in the morning with temperatures dipping through the
day. Any lingering snow cover will also play an impact on the
temperatures into next week. Winds are also to become breezy
Sunday and into Monday morning as the surface high bringing this
cold air dips south into the Central Plains and pressure gradients
increase across the area. Sustained winds of 15 to 25 knots are
possible, which could make hazardous conditions across the
Panhandles Sunday with light blowing and drifting snow. Wind
chills through the day Sunday will likely not get above -5 and
then later that night wind chills will drop between -20 and -25
across much of the area. Some records have a chance to be broken
as early as Saturday through Tuesday with this cold blast of air.
Models have been trending colder late next week and may continue
with any additional snow cover, which could cause some portions of
the Panhandles to break a record streak for number of days below
freezing. The latest conditions this week and future forecasts
have a chance for over a week of temperatures below freezing.

Rutt

AVIATION...18Z TAFS...
MVFR/IFR conditions continue over the next 3 to 6 hours at all TAF
sites, and skies should clear out in the afternoon to VFR. KGUY,
is still in question, and while VFR is possible around 00z, it may
be short lived as low clouds may return shortly. But by 09-12Z
Friday MVFR/IFR cig's should return. FZFG will not be ruled out in
the 09-15z time frame, but confidence is too low to note in the
TAFS.

Weber

&&

.AMA Watches/Warnings/Advisories...
TX...None.
OK...None.

&&
Hazardous weather outlook, Feb 11, 3:03 PM CST, 12 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
303 PM CST Thu Feb 11 2021

OKZ001>003-TXZ001>020-317-120915-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
303 PM CST Thu Feb 11 2021

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Tonight.

No hazardous weather is expected.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Subzero wind chills will be possible across the Oklahoma Panhandle
and the northern and eastern Texas Panhandle during the morning
hours across most of the Panhandles every morning from Friday
through Tuesday. The coldest wind chills will occur Sunday into
Monday when values of 15 to 25 below zero are possible.

Impactful snowfall is possible across the combined Texas and
Oklahoma Panhandles starting Saturday night through Monday
morning.

Another round of snow possible for the eastern Panhandles Tuesday
night into Wednesday afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time. However,
spotters may be called for snowfall/winter reports.

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 12, 3:13 AM CSTWinter Storm WatchAMAArmstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more12 hr
Feb 12, 2:56 PM CSTWinter Storm WarningAMAArmstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more52 hr

Nearby

Wind Chill Advisories in Texas, 2021Wind Chill Advisories in Oklahoma, 2021Every wind chill advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.