Alert archive / Texas / Wind Chill Advisories in 2021

Wind Chill Advisory 1, NWS Austin/San Antonio, TX

February 14, 202133 counties in Texas

NWS Austin/San Antonio, TX issued this wind chill advisory at Feb 14, 2021, 3:47 AM CST for 33 counties in Texas. It took effect at Feb 14, 2021, 9:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 14, 2021, 3:47 AM CST (09:47 UTC)
In effect from
Feb 14, 2021, 9:00 PM CST
Expired
Feb 14, 2021, 1:01 PM CST
In force
Issued by
NWS Austin/San Antonio, TX
All 33 counties

Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Fayette County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Maverick County, TX, Medina County, TX, Real County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 57 km from the middle of the area, began a volume at 09:50 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

Del Rio, TX (KDRT), launched 00:00Z, 9.8 hours before the alert went out and 218 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, Del Rio, TX at 00:00Z on 2021-02-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Del Rio, TX at 00:00Z on 2021-02-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.193958Sfc1 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
560 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

665 
WWUS44 KEWX 140947
WSWEWX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Austin/San Antonio TX
347 AM CST Sun Feb 14 2021

...MAJOR WINTER STORM TO IMPACT THE REGION THROUGH MONDAY
MORNING...

.Bitterly cold air and wintry precipitation in the form of
freezing rain, sleet, and snow will impact the region today 
through Monday morning. The system could lead to major stress on 
the region's infrastructure as well as cripple travel. The coldest
temperatures since 1989 will impact the region. Wind chill indices
could fall to between 15 below zero to near zero late tonight.

TXZ171>173-183>194-202>209-218>225-142100-
/O.NEW.KEWX.WC.Y.0001.210215T0300Z-210215T1800Z/
/O.CON.KEWX.WS.W.0003.000000T0000Z-210215T1800Z/
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Zavala-Frio-
Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-
Including the cities of Llano, Burnet, Georgetown, Del Rio, 
Rocksprings, Leakey, Kerrville, Bandera, Fredericksburg, Boerne, 
Blanco, San Marcos, Austin, Bastrop, Giddings, Brackettville, 
Uvalde, Hondo, San Antonio, New Braunfels, Seguin, Lockhart, 
La Grange, Crystal City, Pearsall, Pleasanton, Floresville, 
Karnes City, Gonzales, Cuero, and Hallettsville
347 AM CST Sun Feb 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST MONDAY...
...WIND CHILL ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON
CST MONDAY...

* WHAT...For the Winter Storm Warning, heavy mixed precipitation.
  Additional snow accumulations of 1 to 3 inches with isolated
  amounts near 6 inches and ice accumulations up to around one 
  tenth of an inch. For the Wind Chill Advisory, very cold wind 
  chills expected. Wind chills as low as 15 below zero.

* WHERE...Portions of south central Texas.

* WHEN...For the Winter Storm Warning, until noon CST Monday. For
  the Wind Chill Advisory, from 9 PM this evening to noon CST
  Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could result in hypothermia if precautions are not 
  taken.

* ADDITIONAL DETAILS...Bitterly cold air will combine with gusty
  winds to produce wind wind chill values of -15 to around zero 
  degrees Monday morning. These values can lead to hypothermia for
  anyone stranded within the icy roads expected.

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 venturing outside. Wear appropriate clothing, a
hat, and gloves. 

The latest road conditions for the state can be obtained at
drivetexas.org.

&&

$$

TXZ217-228-142100-
/O.NEW.KEWX.WC.Y.0001.210215T0300Z-210215T1800Z/
/O.CON.KEWX.WW.Y.0003.210214T2100Z-210215T1800Z/
Maverick-Dimmit-
Including the cities of Eagle Pass and Carrizo Springs
347 AM CST Sun Feb 14 2021

...WINTER WEATHER ADVISORY IS IN EFFECT FROM 3 PM THIS AFTERNOON
THROUGH NOON CST MONDAY... 
...WIND CHILL ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON 
CST MONDAY...

* WHAT...For the Winter Weather Advisory, mixed precipitation 
  expected. Total snow accumulations of up to one inch and ice 
  accumulations of a light glaze. For the Wind Chill Advisory, 
  very cold wind chills expected. Wind chills as low as 5 below 
  zero.

* WHERE...Maverick and Dimmit Counties.

* WHEN...For the Winter Weather Advisory, from 3 PM this afternoon
  through noon CST Monday. For the Wind Chill Advisory, from 9 
  PM this evening to noon CST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could result in hypothermia if precautions are not 
  taken.

* ADDITIONAL DETAILS...Bitterly cold air will combine with gusty
  winds to produce wind wind chill values near zero degrees Monday
  morning. These values can lead to hypothermia for anyone 
  stranded within the icy roads expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

The latest road conditions for the state can be obtained at
drivetexas.org.

&&

$$
2 follow-up statements
212 
WWUS44 KEWX 141648
WSWEWX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Austin/San Antonio TX
1048 AM CST Sun Feb 14 2021

...MAJOR WINTER STORM TO IMPACT THE REGION THROUGH MONDAY
MORNING...

.Bitterly cold air and wintry precipitation in the form of
freezing rain, sleet, and snow will impact the region today
through Monday morning. The system could lead to major stress on
the region's infrastructure as well as cripple travel. The
coldest temperatures since 1989 will impact the region. Wind
chill indices could fall to between 15 below zero to near zero
late tonight.

TXZ217-228-150200-
/O.UPG.KEWX.WW.Y.0003.210214T2100Z-210215T1800Z/
/O.EXA.KEWX.WS.W.0003.000000T0000Z-210215T1800Z/
/O.CON.KEWX.WC.Y.0001.210215T0300Z-210215T1800Z/
Maverick-Dimmit-
Including the cities of Eagle Pass and Carrizo Springs
1048 AM CST Sun Feb 14 2021

...WINTER STORM WARNING IN EFFECT UNTIL NOON CST MONDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING
TO NOON CST MONDAY...

* WHAT...For the Winter Storm Warning, heavy snow. Additional 
  snow accumulations of up to one-two inches. For the Wind Chill 
  Advisory, very cold wind chills expected. Wind chills as low 
  as 5 below zero.

* WHERE...Maverick and Dimmit Counties.

* WHEN...For the Winter Storm Warning, until noon CST Monday. 
  For the Wind Chill Advisory, from 9 PM this evening to noon 
  CST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could result in hypothermia if precautions are not 
  taken.

* ADDITIONAL DETAILS...Bitterly cold air will combine with gusty 
  winds to produce wind wind chill values near zero degrees 
  Monday morning. These values can lead to hypothermia for 
  anyone stranded within the icy roads expected.

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 can be obtained at
drivetexas.org.

&&

$$

TXZ171>173-183>194-202>209-218>225-150200-
/O.CON.KEWX.WS.W.0003.000000T0000Z-210215T1800Z/
/O.CON.KEWX.WC.Y.0001.210215T0300Z-210215T1800Z/
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Zavala-Frio-
Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-
Including the cities of Llano, Burnet, Georgetown, Del Rio, 
Rocksprings, Leakey, Kerrville, Bandera, Fredericksburg, Boerne, 
Blanco, San Marcos, Austin, Bastrop, Giddings, Brackettville, 
Uvalde, Hondo, San Antonio, New Braunfels, Seguin, Lockhart, 
La Grange, Crystal City, Pearsall, Pleasanton, Floresville, 
Karnes City, Gonzales, Cuero, and Hallettsville
1048 AM CST Sun Feb 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON CST MONDAY...
...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING
TO NOON CST MONDAY...

* WHAT...For the Winter Storm Warning, heavy mixed 
  precipitation. Additional snow accumulations of 1 to 3 inches 
  with isolated amounts near 6 inches and ice accumulations up 
  to around one tenth of an inch. For the Wind Chill Advisory, 
  very cold wind chills expected. Wind chills as low as 15 below 
  zero.

* WHERE...Portions of south central Texas.

* WHEN...For the Winter Storm Warning, until noon CST Monday. 
  For the Wind Chill Advisory, from 9 PM this evening to noon 
  CST Monday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could result in hypothermia if precautions are not 
  taken.

* ADDITIONAL DETAILS...Bitterly cold air will combine with gusty 
  winds to produce wind wind chill values of 15 -to around zero 
  degrees Monday morning. These values can lead to hypothermia 
  for anyone stranded within the icy roads expected.

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 can be obtained at
drivetexas.org.

&&

$$
395 
WWUS44 KEWX 141901
WSWEWX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Austin/San Antonio TX
101 PM CST Sun Feb 14 2021

...MAJOR WINTER STORM TO IMPACT THE REGION THROUGH MONDAY
MORNING...

.Bitterly cold air and wintry precipitation in the form of
freezing rain, sleet, and snow will impact the region today
through Monday morning. The system could lead to major stress on
the region's infrastructure as well as cripple travel. The
coldest temperatures since 1989 will impact the region. Wind
chill indices could fall to between 15 below zero to near zero
late tonight.

TXZ171>173-183>194-202>209-217>225-228-150600-
/O.UPG.KEWX.WC.Y.0001.210215T0300Z-210215T1800Z/
/O.NEW.KEWX.WC.W.0001.210215T0000Z-210215T1800Z/
/O.CON.KEWX.WS.W.0003.000000T0000Z-210215T1800Z/
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala-
Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit-
Including the cities of Llano, Burnet, Georgetown, Del Rio, 
Rocksprings, Leakey, Kerrville, Bandera, Fredericksburg, Boerne, 
Blanco, San Marcos, Austin, Bastrop, Giddings, Brackettville, 
Uvalde, Hondo, San Antonio, New Braunfels, Seguin, Lockhart, 
La Grange, Eagle Pass, Crystal City, Pearsall, Pleasanton, 
Floresville, Karnes City, Gonzales, Cuero, Hallettsville, 
and Carrizo Springs
101 PM CST Sun Feb 14 2021

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

* WHAT...For the Winter Storm Warning, heavy mixed precipitation.
  Additional snow accumulations of 1 to 4 inches with isolated
  totals up to 6 inches and ice accumulations of around one tenth
  of an inch. The heaviest snow accumulations are expected north
  of a Rocksprings to San Antonio to Schulenburg line. Winds 
  gusting as high as 35 mph. For the Wind Chill Warning, 
  dangerously cold wind chills expected. Wind chills as low as 15 
  below zero.

* WHERE...South Central Texas.

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

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning commute. The cold wind 
  chills could result in hypothermia if precautions are not 
  taken.

* ADDITIONAL DETAILS...Bitterly cold air will combine with gusty 
  winds to produce wind wind chill values near zero degrees Monday
  morning. These values can lead to hypothermia for anyone 
  stranded within the icy roads expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

The latest road conditions for the state can be obtained at
drivetexas.org.

&&

$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 14, 1:01 PM CSTWind Chill WarningEWXAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more23 hr

Nearby

Wind Chill Advisories in Texas, 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.