Alert archive / Oklahoma / Winter Storm Watches in 2021

Winter Storm Watch 3, NWS Norman, OK

February 14, 202148 counties in Oklahoma; 8 counties in Texas

NWS Norman, OK issued this winter storm watch at Feb 14, 2021, 2:53 PM CST for 48 counties in Oklahoma; 8 counties in Texas. It took effect at Feb 16, 2021, 12:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Feb 14, 2021, 2:53 PM CST (20:53 UTC)
In effect from
Feb 16, 2021, 12:00 PM CST
Expired
Feb 15, 2021, 3:02 PM CST
In force
Issued by
NWS Norman, OK
All 56 counties

Alfalfa County, OK, Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 20:55 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

Norman, OK (KOUN), launched 12:00Z, 8.9 hours before the alert went out and 67 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, Norman, OK at 12:00Z 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2021-02-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.19395878Sfc1 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
568 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

934 
WWUS44 KOUN 142053
WSWOUN

URGENT - WINTER WEATHER MESSAGE
National Weather Service Norman OK
253 PM CST Sun Feb 14 2021

...Winter Storm Warning Today Through Sunrise Monday... ...Wind
Chill Warning through Tuesday Morning...Winter Storm Watch Tuesday
and Wednesday...

OKZ004>048-050>052-TXZ083>090-151200-
/O.NEW.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
/O.CON.KOUN.WS.W.0001.000000T0000Z-210215T1200Z/
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Medford, Pond Creek, Lamont, Wakita, Ponca City, 
Blackwell, Shattuck, Arnett, Gage, Fargo, Woodward, Fairview, 
Enid, Perry, Cheyenne, Hammon, Seiling, Vici, Taloga, Leedey, 
Weatherford, Clinton, Watonga, Geary, Okeene, Kingfisher, 
Hennessey, Okarche, Guthrie, Stillwater, Elk City, Sayre, 
Cordell, Burns Flat, Sentinel, Anadarko, Hinton, Yukon, Concho, 
El Reno, Mustang, Oklahoma City, Chandler, Stroud, Prague, 
Meeker, Davenport, Wellston, Chickasha, Tuttle, Purcell, 
Newcastle, Blanchard, Norman, Moore, Shawnee, Seminole, Wewoka, 
Holdenville, Wetumka, Hollis, Mangum, Granite, Hobart, Snyder, 
Altus, Frederick, Lawton, Duncan, Pauls Valley, Lindsay, 
Wynnewood, Sulphur, Davis, Ada, Coalgate, Walters, Temple, 
Waurika, Ringling, Ryan, Ardmore, Tishomingo, Atoka, Marietta, 
Thackerville, Madill, Kingston, Durant, Quanah, Crowell, Vernon, 
Sheppard AFB, Wichita Falls, Munday, Knox City, Seymour, 
Archer City, Holliday, Lakeside City, Scotland, and Henrietta
253 PM CST Sun Feb 14 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...
...WINTER STORM WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
WEDNESDAY EVENING...

* WHAT...For the Wind Chill Warning, dangerously cold wind chills.
  Wind chills as low as 25 below zero. For the Winter Storm
  Warning, snow will continue with snowfall totals of 4 to 8
  inches expected. For the Winter Storm Watch, heavy snow
  possible. Total snow accumulations of 3 to 8 inches possible.

* WHERE...Western two-thirds of Oklahoma and western north Texas.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Warning, until 6 AM CST Monday. For the 
  Winter Storm Watch, from Tuesday afternoon through Wednesday 
  evening.

* IMPACTS...Travel could be very difficult to impossible. 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...

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

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

Monitor the latest forecasts for updates on this situation. 

In Oklahoma, call 8 4 4 4 6 5 4 9 9 7 for road information. In
Texas, call 8 0 0 4 5 2 9 2 9 2 for road information.

&&

$$
3 follow-up statements
677 
WWUS44 KOUN 150042
WSWOUN

URGENT - WINTER WEATHER MESSAGE
National Weather Service Norman OK
642 PM CST Sun Feb 14 2021

...Winter Storm Warning Today Through Sunrise Monday... ...Wind
Chill Warning through Tuesday Morning...Winter Storm Watch
Tuesday and Wednesday...

OKZ004>007-009>012-014>017-021-151200-
/O.CAN.KOUN.WS.W.0001.000000T0000Z-210215T1200Z/
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
/O.CON.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
Harper-Woods-Alfalfa-Grant-Ellis-Woodward-Major-Garfield-
Roger Mills-Dewey-Custer-Blaine-Beckham-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Medford, Pond Creek, Lamont, Wakita, Shattuck, Arnett, 
Gage, Fargo, Woodward, Fairview, Enid, Cheyenne, Hammon, Seiling,
Vici, Taloga, Leedey, Weatherford, Clinton, Watonga, Geary, 
Okeene, Elk City, and Sayre
642 PM CST Sun Feb 14 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH WEDNESDAY EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...For the Wind Chill Warning, dangerously cold wind chills.
  Wind chills as low as 25 below zero. For the Winter Storm  
  Watch, heavy snow possible. Total snow accumulations of 3 to 8 
  inches possible.

* WHERE...Portions of northern, northwest and western Oklahoma.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Watch, from Tuesday afternoon through 
  Wednesday evening.

* IMPACTS...Some hazardous travel will continue to be difficult
  overnight. 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...

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

Monitor the latest forecasts for updates on this situation. 

&&

$$

OKZ008-013-018>020-022>048-050>052-TXZ083>090-151200-
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
/O.CON.KOUN.WS.W.0001.000000T0000Z-210215T1200Z/
/O.CON.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
Kay-Noble-Kingfisher-Logan-Payne-Washita-Caddo-Canadian-Oklahoma-
Lincoln-Grady-McClain-Cleveland-Pottawatomie-Seminole-Hughes-
Harmon-Greer-Kiowa-Jackson-Tillman-Comanche-Stephens-Garvin-
Murray-Pontotoc-Coal-Cotton-Jefferson-Carter-Johnston-Atoka-Love-
Marshall-Bryan-Hardeman-Foard-Wilbarger-Wichita-Knox-Baylor-
Archer-Clay-
Including the cities of Ponca City, Blackwell, Perry, Kingfisher,
Hennessey, Okarche, Guthrie, Stillwater, Cordell, Burns Flat, 
Sentinel, Anadarko, Hinton, Yukon, Concho, El Reno, Mustang, 
Oklahoma City, Chandler, Stroud, Prague, Meeker, Davenport, 
Wellston, Chickasha, Tuttle, Purcell, Newcastle, Blanchard, 
Norman, Moore, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, 
Hollis, Mangum, Granite, Hobart, Snyder, Altus, Frederick, 
Lawton, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis,
Ada, Coalgate, Walters, Temple, Waurika, Ringling, Ryan, Ardmore,
Tishomingo, Atoka, Marietta, Thackerville, Madill, Kingston, 
Durant, Quanah, Crowell, Vernon, Sheppard AFB, Wichita Falls, 
Munday, Knox City, Seymour, Archer City, Holliday, Lakeside City,
Scotland, and Henrietta
642 PM CST Sun Feb 14 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM CST MONDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH WEDNESDAY EVENING...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 25 below zero. For the Winter 
  Storm Warning, snow will continue with snowfall totals of 4 to 
  8 inches expected. For the Winter Storm Watch, heavy snow 
  possible. Total snow accumulations of 3 to 8 inches possible.

* WHERE...Western two-thirds of Oklahoma and western north Texas.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Warning, until 6 AM CST Monday. For the 
  Winter Storm Watch, from Tuesday afternoon through Wednesday 
  evening.

* IMPACTS...Travel could be very difficult to impossible. 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...

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

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

Monitor the latest forecasts for updates on this situation.

In Oklahoma, call 8 4 4 4 6 5 4 9 9 7 for road information. In
Texas, call 8 0 0 4 5 2 9 2 9 2 for road information.

&&

$$
533 
WWUS44 KOUN 150948
WSWOUN

URGENT - WINTER WEATHER MESSAGE
National Weather Service Norman OK
348 AM CST Mon Feb 15 2021

...Wind Chill Warning through Tuesday Morning and Winter Storm 
Watch Tuesday and Wednesday...

OKZ008-013-018>020-022>048-050>052-TXZ083>090-152300-
/O.CAN.KOUN.WS.W.0001.000000T0000Z-210215T1200Z/
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
/O.CON.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
Kay-Noble-Kingfisher-Logan-Payne-Washita-Caddo-Canadian-Oklahoma-
Lincoln-Grady-McClain-Cleveland-Pottawatomie-Seminole-Hughes-
Harmon-Greer-Kiowa-Jackson-Tillman-Comanche-Stephens-Garvin-
Murray-Pontotoc-Coal-Cotton-Jefferson-Carter-Johnston-Atoka-Love-
Marshall-Bryan-Hardeman-Foard-Wilbarger-Wichita-Knox-Baylor-
Archer-Clay-
Including the cities of Ponca City, Blackwell, Perry, Kingfisher,
Hennessey, Okarche, Guthrie, Stillwater, Cordell, Burns Flat, 
Sentinel, Anadarko, Hinton, Yukon, Concho, El Reno, Mustang, 
Oklahoma City, Chandler, Stroud, Prague, Meeker, Davenport, 
Wellston, Chickasha, Tuttle, Purcell, Newcastle, Blanchard, 
Norman, Moore, Shawnee, Seminole, Wewoka, Holdenville, Wetumka, 
Hollis, Mangum, Granite, Hobart, Snyder, Altus, Frederick, 
Lawton, Duncan, Pauls Valley, Lindsay, Wynnewood, Sulphur, Davis,
Ada, Coalgate, Walters, Temple, Waurika, Ringling, Ryan, Ardmore,
Tishomingo, Atoka, Marietta, Thackerville, Madill, Kingston, 
Durant, Quanah, Crowell, Vernon, Sheppard AFB, Wichita Falls, 
Munday, Knox City, Seymour, Archer City, Holliday, Lakeside City,
Scotland, and Henrietta
348 AM CST Mon Feb 15 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH WEDNESDAY EVENING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 25 below zero. For the Winter 
  Storm Watch, heavy snow possible. Total snow accumulations of 
  4 to 8 inches possible.

* WHERE...Portions of central, east central, northern, 
  southeast, southern, southwest and western Oklahoma and 
  northern Texas.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Watch, from Tuesday afternoon through 
  Wednesday evening.

* IMPACTS...Travel could be very difficult to impossible. 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. 

Monitor the latest forecasts for updates on this situation. 

&&

$$

OKZ004>007-009>012-014>017-021-152300-
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
/O.CON.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
Harper-Woods-Alfalfa-Grant-Ellis-Woodward-Major-Garfield-
Roger Mills-Dewey-Custer-Blaine-Beckham-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Medford, Pond Creek, Lamont, Wakita, Shattuck, Arnett, 
Gage, Fargo, Woodward, Fairview, Enid, Cheyenne, Hammon, Seiling,
Vici, Taloga, Leedey, Weatherford, Clinton, Watonga, Geary, 
Okeene, Elk City, and Sayre
348 AM CST Mon Feb 15 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH WEDNESDAY EVENING...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 30 below zero. For the Winter 
  Storm Watch, heavy snow possible. Total snow accumulations of 
  4 to 6 inches possible.

* WHERE...Portions of northern, northwest and western Oklahoma.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Watch, from Tuesday afternoon through 
  Wednesday evening.

* IMPACTS...Travel could be very difficult to impossible. 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.

Monitor the latest forecasts for updates on this situation.

&&

$$

Mahale
541 
WWUS44 KOUN 152102
WSWOUN

URGENT - WINTER WEATHER MESSAGE
National Weather Service Norman OK
302 PM CST Mon Feb 15 2021

...Wind Chill Warning through Tuesday Morning and Winter Storm
Warning and Winter Weather Advisory Tuesday and Wednesday...

OKZ007-008-011>048-050>052-TXZ083-085-086-089-090-161200-
/O.UPG.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
/O.NEW.KOUN.WS.W.0002.210216T1800Z-210218T0000Z/
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
Grant-Kay-Major-Garfield-Noble-Roger Mills-Dewey-Custer-Blaine-
Kingfisher-Logan-Payne-Beckham-Washita-Caddo-Canadian-Oklahoma-
Lincoln-Grady-McClain-Cleveland-Pottawatomie-Seminole-Hughes-
Harmon-Greer-Kiowa-Jackson-Tillman-Comanche-Stephens-Garvin-
Murray-Pontotoc-Coal-Cotton-Jefferson-Carter-Johnston-Atoka-Love-
Marshall-Bryan-Hardeman-Wilbarger-Wichita-Archer-Clay-
Including the cities of Medford, Pond Creek, Lamont, Wakita, 
Ponca City, Blackwell, Fairview, Enid, Perry, Cheyenne, Hammon, 
Seiling, Vici, Taloga, Leedey, Weatherford, Clinton, Watonga, 
Geary, Okeene, Kingfisher, Hennessey, Okarche, Guthrie, 
Stillwater, Elk City, Sayre, Cordell, Burns Flat, Sentinel, 
Anadarko, Hinton, Yukon, Concho, El Reno, Mustang, Oklahoma City,
Chandler, Stroud, Prague, Meeker, Davenport, Wellston, Chickasha,
Tuttle, Purcell, Newcastle, Blanchard, Norman, Moore, Shawnee, 
Seminole, Wewoka, Holdenville, Wetumka, Hollis, Mangum, Granite, 
Hobart, Snyder, Altus, Frederick, Lawton, Duncan, Pauls Valley, 
Lindsay, Wynnewood, Sulphur, Davis, Ada, Coalgate, Walters, 
Temple, Waurika, Ringling, Ryan, Ardmore, Tishomingo, Atoka, 
Marietta, Thackerville, Madill, Kingston, Durant, Quanah, Vernon,
Sheppard AFB, Wichita Falls, Archer City, Holliday, 
Lakeside City, Scotland, and Henrietta
302 PM CST Mon Feb 15 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WARNING IN EFFECT FROM NOON TUESDAY TO 6 PM CST
WEDNESDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 30 below zero. For the Winter 
  Storm Warning, heavy snow expected. Total snow accumulations 
  of 4 to 8 inches.

* WHERE...Portions of central, north central, southern, and
  western Oklahoma and western north Texas.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Storm Warning, from noon Tuesday to 6 PM CST 
  Wednesday.

* IMPACTS...Travel could be very difficult. 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.

* ADDITIONAL DETAILS...Below zero wind chills will continue
  Tuesday night into Wednesday across portions of the area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

In Oklahoma, call 8 4 4 4 6 5 4 9 9 7 for road information. In
Texas, call 8 0 0 4 5 2 9 2 9 2 for road information.

&&

$$

OKZ004>006-009-010-TXZ084-087-088-161200-
/O.UPG.KOUN.WS.A.0003.210216T1800Z-210218T0600Z/
/O.NEW.KOUN.WW.Y.0007.210216T1800Z-210218T0000Z/
/O.CON.KOUN.WC.W.0001.000000T0000Z-210216T1800Z/
Harper-Woods-Alfalfa-Ellis-Woodward-Foard-Knox-Baylor-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Shattuck, Arnett, Gage, Fargo, Woodward, Crowell, Munday,
Knox City, and Seymour
302 PM CST Mon Feb 15 2021

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER WEATHER ADVISORY IN EFFECT FROM NOON TUESDAY TO 6 PM
CST WEDNESDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 30 below zero. For the Winter 
  Weather Advisory, snow expected. Total snow accumulations of 1 
  to 3 inches.

* WHERE...Portions of northwest Oklahoma and western north Texas.

* WHEN...For the Wind Chill Warning, until noon CST Tuesday. For 
  the Winter Weather Advisory, from noon Tuesday to 6 PM CST 
  Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the morning or evening commute. The 
  dangerously cold wind chills could cause frostbite on exposed 
  skin in as little as 10 minutes.

* ADDITIONAL DETAILS...Below zero wind chills will continue
  Tuesday night into Wednesday.

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. 

In Oklahoma, call 8 4 4 4 6 5 4 9 9 7 for road information. In
Texas, call 8 0 0 4 5 2 9 2 9 2 for road information.

&&

$$

What forecasters said that day

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

NWS Norman, OK wrote its last area forecast discussion before this winter storm watch went out at Feb 14, 2:42 PM CST, 11 minutes earlier.

Area forecast discussion, Feb 14, 2:42 PM CST, 11 minutes before
Area Forecast Discussion
National Weather Service Norman OK
242 PM CST Sun Feb 14 2021

...New LONG TERM...

.UPDATE...
Issued at 1103 AM CST Sun Feb 14 2021

The primary update this morning is to the headlines. Given how the
significant snow will likely end this evening or overnight, we
are changing the Winter Storm Warning expiration time to
12Z/Monday, although we may be able to start taking out some of
the western areas earlier. But we are also issuing a separate Wind
Chill Warning from now through 18Z/Tuesday. We had been
addressing the wind chill concerns with the Winter Storm Warning,
but given these cold temperature and wind chill readings are
rather rare and will persist longer than the snow, we are going to
use both headlines. Both headlines are encompassed within the
Winter Weather Message product (WSWOUN).

Made some minor adjustments to the timing of the primary snow band
moving in as it is already moving into central Oklahoma. Will
leave the forecast snow amounts as they are for now and will watch
radar trends on the west side of the precipitation band. If there
is not much additional development, we may be aiming for the low
side of the forecast range, but there has been some increasing
reflectivity in west Texas near Lubbock and the Texas South
Plains which could give areas additional duration and accumulation.

&&

.SHORT TERM...
(Today and tonight)
Issued at 420 AM CST Sun Feb 14 2021

A significant winter storm with possibly near blizzard conditions
and dangerous, life-threatening wind chills will affect the area
today. Travel is strongly discouraged as snow and blowing snow
could significantly reduce visibility and result in drifts of
snow.

Snow is already falling across the area in response to a lead
wave, ahead of the primary trough. Most of the ascent with this
wave has been focused along and north of I-40. This lead wave will
continue to move eastward this morning. There will probably be a
short lull between this wave and the primary wave (though light
snow will remain possible).

Water vapor imagery shows ascent from the primary wave spreading
across the Texas panhandle. As it approaches from the west, ascent
will progress eastward. Snow will first move into far western
Oklahoma and adjacent parts of north Texas just before sunrise.
The snow should become heavy as it moves eastward toward central
Oklahoma/I-35 corridor by early afternoon and then southeast/east
central Oklahoma by late afternoon into evening. Snow to liquid
ratios are expected be around ~20:1 (or perhaps even a little
higher) during the heaviest snowfall with the relatively cold
thermal profile. Snow intensity will decrease from west to east
during the afternoon and evening, with the heaviest snow expected
to move out before midnight across the southeast. However,
lingering light snow will remain possible overnight.

During the heaviest snow, the 925 mb winds are progged to be
between 25 to 30 knots. Momentum transfer on BUFKIT soundings
indicate wind gusts to 25 knots (~30 mph) may reach the surface.
Therefore, near blizzard conditions are possible in the heaviest
bands of snow.

These gusty northerly winds, combined with air temperatures in
single digits and teens, will result in wind chills of -15 to -25
deg F. These dangerously cold temperatures and wind chills will
make the risk of travel dangerous as you don’t want to become
stranded in your vehicle.

Amounts of snowfall are slightly lower for some locations and are
on the order of ~5 to 9" in the official forecast. Note that the
decrease is not as significant a change as it may appear on our
snowfall graphic (generally ~0.5" to 1.5 lower for some
locations). In addition, the relatively low water content will
make the snow easily blow around and drift. Some of the drifts
could be quite significant. This will make it difficult to measure
snowfall accurately. Therefore, please do not focus on specific
amounts because locations will appear to receive more or less snow
in short distances depending on drifting (regardless of actual
snowfall). Consequently, I would interpret any of the areas within
the 8 to 10" range to be a little broader as any values above 8"
are put in this range (e.g., 8.1" would show up as 8 to 10" on the
graphic). In reality, 6 to 10" is probably more representative on
the range of possibilities for these locations (especially given
the high sensitivity to QPF with the relatively high snow to
liquid ratios).

As the system departs, a very cold night is expected tonight with
lows below zero to near zero deg F. With continued northerly
winds, dangerously cold wind chills are expected with values of
-15 to -25 deg F. Some locations may get as low as -30 deg F.

Mahale

&&

.LONG TERM...
(Monday night through next Saturday)
Issued at 241 PM CST Sun Feb 14 2021

Dangerous temperatures/wind chills and additional snow continues to
be the story this week.

First the dangerous temperatures/wind chills: The coldest night is
forecast for Monday night with lows below zero across the entire fa
and in the minus teens at some locations. These very cold
temperatures will combine with the wind to lead to wind chills in
the minus teens and 20s, maybe even as low as -30 in some locations.
A Wind Chill Warning is in effect through Tuesday morning for these
dangerous wind chills. The cold, below freezing temperatures will
continue across the fa through at least Thursday and portions of the
area on Friday. The forecast has the entire fa climbing above
freezing over the weekend although this will be dependent on how
much snow occurs and then how quickly it disappears.

Next a second snow storm: Additional snow is expected with another
storm that is expected to affect the area Tuesday and Wednesday.
Right now, it looks like the snow will come in 2 rounds. The first
round is currently expected to have the heaviest snowfall in the
vicinity of the I-40 corridor and north Tuesday afternoon and
evening. The 2nd round is expected Wednesday, with highest amounts
in parts of south central and southeast OK. There is still
uncertainty with this storm system, especially in terms of how much
snow and where but there seems to be a bit more uncertainty with the
second round. Models have shifted the axis of highest QPF a little
bit east which would reduce snowfall amounts some. Right now, it
looks like an area of 4-6 inches of snow seems reasonable with 6-8
inches possible in those areas of heaviest snow. However, with the
uncertainties these amounts will likely fluctuate/change as we get
closer to the event. With the potential of 4+ inches of snow, the
impacts of any additional snow on what should still be around from
today, and the uncertainties in the forecast, will issue a winter
storm watch for the entire fa from noon on Tuesday to midnight
Wednesday night although some of the areas may not reach 4 inches.

After this storm system exits the area, the forecast will remain dry
into next weekend.

&&

.AVIATION...
(18Z TAFS)
Issued at 1155 AM CST Sun Feb 14 2021

The large band of moderate to heavy snow is moving across the
area this morning. IFR and LIFR conditions are expected within
this band, especially with visibility with the snow and blowing
snow. Some lingering flurries, blowing snow and low ceilings are
expected to keep widespread low MVFR to IFR conditions this
evening and overnight, although there is some potential for some
clearing late Monday morning in the far west.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  -5   5  -9  13 /  70  20   0  60
Hobart OK         -6   9  -7  12 /  40  10   0  70
Wichita Falls TX  -2  11  -6  15 /  70  10   0  50
Gage OK          -12   6  -9  11 /  20  10   0  50
Ponca City OK     -6   5 -12  11 /  70  20   0  40
Durant OK          0  13  -5  19 / 100  10   0  20

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Winter Storm Watch from Tuesday afternoon through Wednesday
     evening for OKZ004>048-050>052.

     Wind Chill Warning until noon CST Tuesday for OKZ004>048-050>052.

     Winter Storm Warning until 6 AM CST Monday for OKZ004>048-
     050>052.

TX...Winter Storm Watch from Tuesday afternoon through Wednesday
     evening for TXZ083>090.

     Wind Chill Warning until noon CST Tuesday for TXZ083>090.

     Winter Storm Warning until 6 AM CST Monday for TXZ083>090.

&&

SHORT TERM...26
LONG TERM....25
AVIATION...26
Hazardous weather outlook, Feb 14, 11:39 AM CST, 3 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
1139 AM CST Sun Feb 14 2021

OKZ004>048-050>052-TXZ083>090-151745-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
1139 AM CST Sun Feb 14 2021

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Today and Tonight...

.Snow...
A winter storm will bring significant snowfall through this
evening. Snowfall totals around 5 to 10 inches are expected. A
gusty northerly wind will result in blowing and significant
drifting of snow as well as very poor visibility.

.Wind Chill...
Record cold temperatures are expected today and tonight. North to
northeast winds will drive the wind chills to dangerous levels.
Wind chills of 10 to 20 degrees below zero are expected today with
even colder wind chills of 20 to 30 below zero tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

.Wind Chill...
Dangerous wind chills of 20 to 30 degrees below zero are expected
over the northern half of Oklahoma early Monday and Tuesday. For
locations along the Red River, wind chills will bottom out around
10 to 20 degrees below zero on Monday and Tuesday.

.Snow...
Accumulating snowfall is likely Tuesday afternoon into Wednesday.
Additional significant snowfall is possible in some areas.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Local storm report, Feb 14, 1:17 PM CST, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
117 PM CST SUN FEB 14 2021

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

0112 PM     SNOW             MIDWEST CITY            35.46N 97.39W
02/14/2021  M2.0 INCH        OKLAHOMA           OK   EMERGENCY MNGR

&&

EM
Local storm report, Feb 14, 1:19 PM CST, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
119 PM CST SUN FEB 14 2021

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

0117 PM     SNOW             ENID                    36.41N 97.87W
02/14/2021  M4.5 INCH        GARFIELD           OK   EMERGENCY MNGR

&&

EM
Local storm report, Feb 14, 1:20 PM CST, 1 hour 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
120 PM CST SUN FEB 14 2021

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

0119 PM     SNOW             FRANCIS                 34.87N 96.59W
02/14/2021  M2.0 INCH        PONTOTOC           OK   STORM CHASER

&&

EM
Local storm report, Feb 14, 1:28 PM CST, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
128 PM CST SUN FEB 14 2021

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

0127 PM     SNOW             1 WSW VERNON            34.14N 99.32W
02/14/2021  M8.0 INCH        WILBARGER          TX   TRAINED SPOTTER

            3 IN IN THE LAST 2 HOURS.

&&

EM
Local storm report, Feb 14, 2:15 PM CST, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
215 PM CST SUN FEB 14 2021

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

0200 PM     SNOW             BLACKWELL               36.80N 97.28W
02/14/2021  M4.0 INCH        KAY                OK   BROADCAST MEDIA

            STILL SNOWING

&&

SC
Local storm report, Feb 14, 2:44 PM CST, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
244 PM CST SUN FEB 14 2021

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

0230 PM     SNOW             PERRY                   36.29N 97.29W
02/14/2021  M2.5 INCH        NOBLE              OK   LAW ENFORCEMENT

            STILL SNOWING

&&

SC

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 14, 10:40 AM CSTWind Chill WarningOUNAlfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more48 hr

Nearby

Winter Storm Watches in Oklahoma, 2021Winter Storm Watches in Texas, 2021Every winter storm watch 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.