Alert archive / Louisiana / Wind Chill Advisories in 2021

Wind Chill Advisory 1, NWS New Orleans, LA

February 14, 202113 parishes in Louisiana; 5 counties in Mississippi

NWS New Orleans, LA issued this wind chill advisory at Feb 14, 2021, 7:17 PM CST for 13 parishes in Louisiana; 5 counties in Mississippi. It took effect at Feb 15, 2021, 3:56 PM CST. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued
Feb 14, 2021, 7:17 PM CST (01:17 UTC)
In effect from
Feb 15, 2021, 3:56 PM CST
Expired
Feb 16, 2021, 12:00 PM CST
In force
20 hr
Issued by
NWS New Orleans, LA

Counties Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.3 hours before the alert went out and 108 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, Slidell Radar S, LA at 00:00Z on 2021-02-15Temperature 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 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2021-02-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
578 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

814 
WWUS44 KLIX 150117
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
717 PM CST Sun Feb 14 2021

...Significant Winter Weather Event Expected Late Tonight through
Monday...

.A shallow but very cold airmass is currently over much of south
Mississippi and southeast Louisiana. An upper level disturbance
will bring abundant moisture into the area late tonight and
Monday. Temperatures aloft are warm, and precipitation that
develops tonight will be rain aloft, but as it reaches the cold
air near the surface, it will transition to freezing rain or
possibly sleet. Heavy freezing rain or sleet is expected across
the warning area during the day Monday before ending from west to
east in the afternoon hours. The expected precipitation amounts,
especially of ice, are likely to produce significant impacts.
After the precipitation ends, even colder air will arrive Monday
night, producing wind chill values in the single digits and teens
overnight Monday night and Tuesday morning.

LAZ034>037-039-046>050-056-057-071-072-MSZ068>071-151215-
/O.UPG.KLIX.WC.A.0001.210216T0000Z-210216T1600Z/
/O.NEW.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
/O.CON.KLIX.WS.W.0001.210215T0600Z-210216T0000Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston-
Assumption-St. James-Northern Tangipahoa-Southern Tangipahoa-
Wilkinson-Amite-Pike-Walthall-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Bayou Sorrel, Plaquemine, White Castle, Port Allen, Addis, 
Brusly, Baton Rouge, Gonzales, Donaldsonville, Prairieville, 
Denham Springs, Watson, Walker, Pierre Part, Labadieville, 
Paincourtville, Convent, Lutcher, Gramercy, Amite, Kentwood, 
Roseland, Wilmer, Hammond, Robert, Ponchatoula, Centreville, 
Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster, Smithdale, 
Liberty, McComb, Dexter, Salem, and Tylertown
717 PM CST Sun Feb 14 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO 6 PM CST MONDAY...
...WIND CHILL ADVISORY IN EFFECT FROM 6 PM MONDAY TO NOON CST
TUESDAY...

* WHAT...For the Winter Storm Warning, significant icing expected.
  Total ice accumulations of one tenth to four tenths of an inch.
  For the Wind Chill Advisory, dangerously cold wind chills 
  expected. Wind chills as low as 5 above zero.

* WHERE...All of Southwest Mississippi and portions of Southeast
  Louisiana generally north and west of a Bogalusa to Hammond to
  Pierre Part line.

* WHEN...For the Winter Storm Warning, from midnight tonight to 
  6 PM CST Monday. For the Wind Chill Advisory, from 6 PM Monday 
  to noon CST Tuesday.

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute. The 
  dangerously cold wind chills could result in hypothermia or 
  frostbite if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Prepare for possible power
outages. 

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.

&&

$$

LAZ040-058>060-065-MSZ077-151215-
/O.UPG.KLIX.WC.A.0001.210216T0000Z-210216T1600Z/
/O.NEW.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
/O.CON.KLIX.WW.Y.0001.210215T1200Z-210216T0000Z/
St. Tammany-St. John The Baptist-Upper Lafourche-St. Charles-
Upper Terrebonne-Pearl River-
Including the cities of Slidell, Mandeville, Covington, Lacombe, 
Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, 
Houma, Bayou Cane, Crossroads, McNeil, Poplarville, and Picayune
717 PM CST Sun Feb 14 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM
CST MONDAY...
...WIND CHILL ADVISORY IN EFFECT FROM 6 PM MONDAY TO NOON CST
TUESDAY...

* WHAT...For the Winter Weather Advisory, freezing rain 
  expected. Total ice accumulations of around one tenth of an 
  inch. For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills as low as 10 above zero.

* WHERE...Portions of southern Mississippi and southeast Louisiana
  generally north and west of a Houma to Lacombe to Poplarville
  line, but south and east of a Bogalusa to Hammond to Pierre Part
  line.

* WHEN...For the Winter Weather Advisory, from 6 AM to 6 PM CST 
  Monday. For the Wind Chill Advisory, from 6 PM Monday to noon 
  CST Tuesday.

* IMPACTS...Difficult travel conditions are possible. The 
  hazardous conditions could impact the morning or evening 
  commute. The dangerously cold wind chills could result in 
  hypothermia or frostbite if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages. 

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.

&&

$$

LAZ061>064-066>070-MSZ080>082-151215-
/O.UPG.KLIX.WC.A.0001.210216T0000Z-210216T1600Z/
/O.NEW.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Hancock-Harrison-Jackson-
Including the cities of Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Chauvin, Cocodrie, 
Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, 
Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, 
Empire, Myrtle Grove, Yscloskey, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
717 PM CST Sun Feb 14 2021

...WIND CHILL ADVISORY IN EFFECT FROM 6 PM MONDAY TO NOON CST
TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  10 above zero.

* WHERE...All of coastal Mississippi and coastal Louisiana
  including portions of metro New Orleans south of Lake
  Pontchartrain. 

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
5 follow-up statements
310 
WWUS44 KLIX 151033
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
433 AM CST Mon Feb 15 2021

...Significant Winter Weather Event Will Continue Today...

.A shallow but very cold airmass is currently over much of south
Mississippi and southeast Louisiana. Low pressure will move across
the northern Gulf of Mexico today toward the Florida Panhandle. 
Temperatures aloft are warm, and precipitation that develops 
tonight will be rain aloft, but as it reaches the cold air near 
the surface, it will transition to freezing rain or possibly 
sleet. Heavy freezing rain or sleet is expected across the warning
area during the day today before ending from west to east in the 
afternoon hours. The expected precipitation amounts, especially of
ice, are likely to produce significant impacts. After the 
precipitation ends, even colder air will arrive tonight, 
producing wind chill values in the single digits and teens 
overnight into Tuesday morning.

LAZ034>037-039-046>050-056-057-071-072-MSZ068>071-151845-
/O.CON.KLIX.WS.W.0001.000000T0000Z-210216T0000Z/
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston-
Assumption-St. James-Northern Tangipahoa-Southern Tangipahoa-
Wilkinson-Amite-Pike-Walthall-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Bayou Sorrel, Plaquemine, White Castle, Port Allen, Addis, 
Brusly, Baton Rouge, Gonzales, Donaldsonville, Prairieville, 
Denham Springs, Watson, Walker, Pierre Part, Labadieville, 
Paincourtville, Convent, Lutcher, Gramercy, Amite, Kentwood, 
Roseland, Wilmer, Hammond, Robert, Ponchatoula, Centreville, 
Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster, Smithdale, 
Liberty, McComb, Dexter, Salem, and Tylertown
433 AM CST Mon Feb 15 2021

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

* WHAT...For the Winter Storm Warning, significant icing 
  expected. Total ice accumulations of one tenth to four tenths 
  of an inch. For the Wind Chill Advisory, dangerously cold wind 
  chills expected. Wind chills as low as 5 above zero.

* WHERE...All of Southwest Mississippi and portions of Southeast 
  Louisiana generally north and west of a Bogalusa to Hammond to 
  Pierre Part line.

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

* IMPACTS...Power outages and tree damage are likely due to the 
  ice. Travel could be nearly impossible. The hazardous 
  conditions could impact the morning or evening commute. The 
  dangerously cold wind chills could result in hypothermia or 
  frostbite if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Prepare for possible power
outages. 

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.

&&

$$

LAZ040-058>060-065-MSZ077-151845-
/O.CON.KLIX.WW.Y.0001.210215T1200Z-210216T0000Z/
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
St. Tammany-St. John The Baptist-Upper Lafourche-St. Charles-
Upper Terrebonne-Pearl River-
Including the cities of Slidell, Mandeville, Covington, Lacombe, 
Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, 
Houma, Bayou Cane, Crossroads, McNeil, Poplarville, and Picayune
433 AM CST Mon Feb 15 2021

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

* WHAT...For the Winter Weather Advisory, freezing rain 
  expected. Total ice accumulations of around one tenth of an 
  inch. For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills as low as 10 above zero.

* WHERE...Portions of southern Mississippi and southeast 
  Louisiana generally north and west of a Houma to Lacombe to 
  Poplarville line, but south and east of a Bogalusa to Hammond 
  to Pierre Part line.

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

* IMPACTS...Difficult travel conditions are possible. The 
  hazardous conditions could impact the morning or evening 
  commute. The dangerously cold wind chills could result in 
  hypothermia or frostbite if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages. 

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.

&&

$$

LAZ061>064-066>070-MSZ080>082-151845-
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Hancock-Harrison-Jackson-
Including the cities of Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Chauvin, Cocodrie, 
Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, 
Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, 
Empire, Myrtle Grove, Yscloskey, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
433 AM CST Mon Feb 15 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  10 above zero.

* WHERE...All of coastal Mississippi and coastal Louisiana 
  including portions of metro New Orleans south of Lake 
  Pontchartrain.

* WHEN...From 6 PM tonight to noon CST Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
064 
WWUS44 KLIX 151658
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
1058 AM CST Mon Feb 15 2021

...Significant Winter Weather Event Continues...

.Precipitation has largely ended or will be ending by mid-day
across the winter storm warning and winter weather advisory areas.
Ice accumulations of between one tenth and one half inch have
occurred in the winter storm warning and winter weather advisory
areas this morning. After the precipitation comes to an end, even
colder air will arrive tonight, producing wind chill values in 
the single digits and teens overnight into Tuesday morning.

LAZ034>037-039-046>050-056-057-071-072-MSZ068>071-160100-
/O.CON.KLIX.WS.W.0001.000000T0000Z-210216T0000Z/
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston-
Assumption-St. James-Northern Tangipahoa-Southern Tangipahoa-
Wilkinson-Amite-Pike-Walthall-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Bayou Sorrel, Plaquemine, White Castle, Port Allen, Addis, 
Brusly, Baton Rouge, Gonzales, Donaldsonville, Prairieville, 
Denham Springs, Watson, Walker, Pierre Part, Labadieville, 
Paincourtville, Convent, Lutcher, Gramercy, Amite, Kentwood, 
Roseland, Wilmer, Hammond, Robert, Ponchatoula, Centreville, 
Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster, Smithdale, 
Liberty, McComb, Dexter, Salem, and Tylertown
1058 AM CST Mon Feb 15 2021

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

* WHAT...For the Winter Storm Warning, significant icing.
  Additional ice accumulations of up to one tenth of an inch
  mainly for areas east of I-55 in Southwest Mississippi. Little
  to no additional ice accumulation expected in Southeast
  Louisiana or for areas west of I-55 in Southwest Mississippi.
  For the Wind Chill Advisory, very cold wind chills in the single
  digits and teens expected.

* WHERE...All of Southwest Mississippi, and portions of Southeast
  Louisiana northwest of a Bogalusa to Hammond to Pierre Part
  line.

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

* IMPACTS...Difficult travel conditions are occurring. The
  hazardous conditions will impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Prepare for possible power
outages. 

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.

&&

$$

LAZ040-058>060-065-MSZ077-160100-
/O.CON.KLIX.WW.Y.0001.000000T0000Z-210216T0000Z/
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
St. Tammany-St. John The Baptist-Upper Lafourche-St. Charles-
Upper Terrebonne-Pearl River-
Including the cities of Slidell, Mandeville, Covington, Lacombe, 
Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, 
Houma, Bayou Cane, Crossroads, McNeil, Poplarville, and Picayune
1058 AM CST Mon Feb 15 2021

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

* WHAT...For the Winter Weather Advisory, freezing rain. Less than
  a tenth of an inch of ice accumulation expected mainly in Pearl
  River County. For the Wind Chill Advisory, very cold wind chills
  expected. Wind chills in the single digits and teens.

* WHERE...Pearl River County in Mississippi and St. Tammany, St.
  Charles, St. John the Baptist, Upper Lafourche, and Upper
  Terrebonne Parishes in Louisiana.

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

* IMPACTS...Difficult travel conditions are possible. The
  hazardous conditions could impact the evening commute. The 
  dangerously cold wind chills could result in hypothermia or 
  frostbite if precautions are not taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Prepare for possible
power outages. 

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.

&&

$$

LAZ061>064-066>070-MSZ080>082-160100-
/O.CON.KLIX.WC.Y.0001.210216T0000Z-210216T1800Z/
Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Hancock-Harrison-Jackson-
Including the cities of Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Chauvin, Cocodrie, 
Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, 
Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, 
Empire, Myrtle Grove, Yscloskey, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
1058 AM CST Mon Feb 15 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 6 PM THIS EVENING
TO NOON CST TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills in the teens.

* WHERE...All of coastal Mississippi and all of Southeast
  Louisiana south and east of a Houma to Destrehan line. 

* WHEN...From 6 PM this evening to noon CST Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PG
295 
WWUS44 KLIX 152156
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
356 PM CST Mon Feb 15 2021

...Life Threatening Wind Chill Values Tonight...

.The combination of winds around 10 mph and temperatures in the
teens and lower 20s will produce wind chill values in the single 
digits and teens tonight into tomorrow morning.

LAZ034>037-039-046>050-056-057-071-072-MSZ068>071-160600-
/O.CAN.KLIX.WS.W.0001.000000T0000Z-210216T0000Z/
/O.EXT.KLIX.WC.Y.0001.210215T2156Z-210216T1800Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston-
Assumption-St. James-Northern Tangipahoa-Southern Tangipahoa-
Wilkinson-Amite-Pike-Walthall-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Bayou Sorrel, Plaquemine, White Castle, Port Allen, Addis, 
Brusly, Baton Rouge, Gonzales, Donaldsonville, Prairieville, 
Denham Springs, Watson, Walker, Pierre Part, Labadieville, 
Paincourtville, Convent, Lutcher, Gramercy, Amite, Kentwood, 
Roseland, Wilmer, Hammond, Robert, Ponchatoula, Centreville, 
Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster, Smithdale, 
Liberty, McComb, Dexter, Salem, and Tylertown
356 PM CST Mon Feb 15 2021

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Very cold wind chills. Wind chills in the single digits.

* WHERE...All of Southwest Mississippi and portions of Southeast
  Louisiana to the northwest of a Bogalusa to Hammond to Pierre 
  Part line.

* WHEN...Until noon CST Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LAZ040-058>060-065-MSZ077-160600-
/O.CAN.KLIX.WW.Y.0001.000000T0000Z-210216T0000Z/
/O.EXT.KLIX.WC.Y.0001.210215T2156Z-210216T1800Z/
St. Tammany-St. John The Baptist-Upper Lafourche-St. Charles-
Upper Terrebonne-Pearl River-
Including the cities of Slidell, Mandeville, Covington, Lacombe, 
Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, 
Houma, Bayou Cane, Crossroads, McNeil, Poplarville, and Picayune
356 PM CST Mon Feb 15 2021

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL NOON CST TUESDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Very cold wind chills. Wind chills in the single digits
  and teens.

* WHERE...Portions of Southeast Louisiana and Southern Mississippi
  to the northwest of a Poplarville to Slidell to Galliano line
  and to the southwest of a Bogalusa to Hammond to Pierre Part
  line. 

* WHEN...Until noon CST Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

LAZ061>064-066>070-MSZ080>082-160600-
/O.EXT.KLIX.WC.Y.0001.210215T2156Z-210216T1800Z/
Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Hancock-Harrison-Jackson-
Including the cities of Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Chauvin, Cocodrie, 
Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, 
Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, 
Empire, Myrtle Grove, Yscloskey, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
356 PM CST Mon Feb 15 2021

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL NOON CST TUESDAY...

* WHAT...Very cold wind chills. Wind chills in the teens.

* WHERE...Portions of Southeast Louisiana to the southeast of a
  New Orleans to Galliano line and all of coastal Mississippi.

* WHEN...Until noon CST Tuesday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

PG
062 
WWUS44 KLIX 161026
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
426 AM CST Tue Feb 16 2021

...Life Threatening Wind Chill Values Continue This Morning...

.The combination of winds around 10 mph and temperatures in the
teens and lower 20s will produce wind chill values in the single
digits and teens this morning.

LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-161800-
/O.CON.KLIX.WC.Y.0001.000000T0000Z-210216T1800Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
St. Tammany-Iberville-West Baton Rouge-East Baton Rouge-Ascension-
Livingston-Assumption-St. James-St. John The Baptist-
Upper Lafourche-St. Charles-Upper Jefferson-Orleans-
Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-
Southern Tangipahoa-Wilkinson-Amite-Pike-Walthall-Pearl River-
Hancock-Harrison-Jackson-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Slidell, Mandeville, Covington, Lacombe, Bayou Sorrel, 
Plaquemine, White Castle, Port Allen, Addis, Brusly, Baton Rouge,
Gonzales, Donaldsonville, Prairieville, Denham Springs, Watson, 
Walker, Pierre Part, Labadieville, Paincourtville, Convent, 
Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose,
Destrehan, Norco, Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Houma, Bayou Cane, 
Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, 
Golden Meadow, Leeville, Buras, Pointe A La Hache, Port Sulphur, 
Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Amite, 
Kentwood, Roseland, Wilmer, Hammond, Robert, Ponchatoula, 
Centreville, Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster,
Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads,
McNeil, Poplarville, Picayune, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
426 AM CST Tue Feb 16 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL NOON CST TODAY...

* WHAT...Very cold wind chills. Wind chills in the teens.

* WHERE...All of Southeast Louisiana and South Mississippi.

* WHEN...Until noon CST.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
422 
WWUS44 KLIX 161808
WSWLIX

URGENT - WINTER WEATHER MESSAGE
National Weather Service New Orleans LA
1208 PM CST Tue Feb 16 2021

...WIND CHILL ADVISORY ALLOWED TO EXPIRE...

.The combination of warming temperature and lighter winds have
pushed wind chills well above the dangerous levels observed last
night. Wind chills will remain in the 20s and lower 30s today, so
continue to dress warmly when headed outside.

LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-161915-
/O.EXP.KLIX.WC.Y.0001.000000T0000Z-210216T1800Z/
Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington-
St. Tammany-Iberville-West Baton Rouge-East Baton Rouge-Ascension-
Livingston-Assumption-St. James-St. John The Baptist-
Upper Lafourche-St. Charles-Upper Jefferson-Orleans-
Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-
Lower Terrebonne-Lower Lafourche-Lower Jefferson-
Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-
Southern Tangipahoa-Wilkinson-Amite-Pike-Walthall-Pearl River-
Hancock-Harrison-Jackson-
Including the cities of New Roads, Lettsworth, Livonia, Spillman,
St. Francisville, Wakefield, Jackson, Clinton, Felps, Darlington,
Easleyville, Greensburg, Montpelier, Bogalusa, Enon, Franklinton,
Slidell, Mandeville, Covington, Lacombe, Bayou Sorrel, 
Plaquemine, White Castle, Port Allen, Addis, Brusly, Baton Rouge,
Gonzales, Donaldsonville, Prairieville, Denham Springs, Watson, 
Walker, Pierre Part, Labadieville, Paincourtville, Convent, 
Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose,
Destrehan, Norco, Metairie, Kenner, East New Orleans, 
New Orleans, Belle Chasse, Chalmette, Violet, Houma, Bayou Cane, 
Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, 
Golden Meadow, Leeville, Buras, Pointe A La Hache, Port Sulphur, 
Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Amite, 
Kentwood, Roseland, Wilmer, Hammond, Robert, Ponchatoula, 
Centreville, Dolorosa, Fort Adams, Woodville, Gillsberg, Gloster,
Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads,
McNeil, Poplarville, Picayune, Bay St. Louis, Waveland, 
Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, 
Gautier, and St. Martin
1208 PM CST Tue Feb 16 2021

...WIND CHILL ADVISORY HAS EXPIRED...

Temperatures have warmed and winds have decreased to around 5 mph
this morning. This has allowed wind chills to warm above dangerous
levels. However, wind chills will remain in the 20s and lower 30s
this afternoon. 

$$

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 New Orleans, LA wrote its last area forecast discussion before this wind chill advisory went out at Feb 14, 4:00 PM CST, 3 hours 17 minutes earlier.

Area forecast discussion, Feb 14, 4:00 PM CST, 3 hours 17 minutes before
Area Forecast Discussion
National Weather Service New Orleans LA
400 PM CST Sun Feb 14 2021

.SHORT TERM (Tonight through Tuesday Night)...A significant winter
weather event will take place across the northern and western
portions of the forecast area beginning later tonight. The event
will be driven the combination of strong upper level forcing
associated with a jet max and longwave trough axis, a Gulf low
pushing through the offshore waters, and isentropic forcing in the
mid-levels.  This event will consist primarily of freezing rain over
the northwest part of the CWA including metro Baton Rouge and
Southwest Mississippi. The freezing rain will be the result of
southwest flow in the mid-levels advecting warm and humid air into
the area. Temperatures of around 4 to 6C are forecast near the top
of the inversion at 800mb. These warm temperatures will keep any
precipitation in liquid form until it reaches the surface over the
vast majority of the CWA. That being said, with surface temperatures
in the upper 20s and lower 30s around Baton Rouge and Southwest MS,
any rain that falls will quickly freeze on surfaces including
power lines, trees, buildings, and bridges.

The precipitation will come to an end by tomorrow afternoon as the
trough axis and surface quickly pull east of the region and a drier
and more stable airmass advects in.  A much colder airmass will also
feed into the region, and overnight lows will fall into the teens
and 20s.  Strong gradient flow will accompany this cold air
advection, and this will push wind chill values into the single
digits and teens Monday night into Tuesday morning. Significantly
below average temperatures are expected to persist through the
remainder of the forecast period with highs in the upper 30s and
lower 40s on Tuesday and lows in the 20s and lower 30s Tuesday
night.  Another hard freeze will be possible over the northern third
of the CWA.

&&

LONG TERM (Thursday through Sunday)...
A very deep upper level trough will dig into the southern Plains
Wednesday night as a surface low develops along the northwestern
Gulf. An area of cool rain showers will initially develop along a
boundary offshore ahead of the system as upper level return flow
supports isentropic lift. Lower to mid levels will be dry initially
on Wednesday evening with lighter amounts expected before
midnight...Wednesday night.  The low will track along a frontal
boundary racing up from the Gulf to the Tennessee valley on
Thursday.  The flow will be generated in a strong southwesterly jet
anchored on the lower right axis of the trough. Rainfall amounts
could be fairly heavy in a relatively short window with Gulf
moisture and plenty of associated lift on Thursday morning. 1034 MB
Arctic high pressure along a deep upper level trough will once again
rebuild into the southern Plains on Thursday afternoon.  Meanwhile
surface low will race from central Alabama up to New England by
Thursday night putting a quick end to rain for the local area.
Trough will flatten and lift into the area by Friday along with
modifying Arctic high pressure.  Temperatures will be cooler on
Thursday night and Friday...however given the lifting
trough...expect to see temperatures only around 10 degrees below
normal on Friday. However...a freeze is likely for interior areas
Friday morning with lows in the 20s to near 30 for inland areas.
Highs will rebound into the 50s on Friday with a warming trend as
high pressure builds in with a more zonal type flow pattern taking
shape.  A shortwave will pass well to our north on Sunday with a
slight chance of showers possible by late Sunday.  Temperatures will
rebound to near normal by Saturday and continue through the weekend.

&&

.AVIATION...Low ceilings will be the primary concern for most of
the terminals through 06z tonight. Ceilings will generally be near
1000 feet with a mix of IFR and MVFR restrictions expected. There
is a band of light sleet that will impact KMCB between 18z and
20z as well. After 06z, conditions are expected to deteriorate
quickly. Prevailing, IFR and LIFR ceilings will take hold and a
mix of precipitation will develop over all of the terminals. At
KASD, KGPT, KNEW, KMSY, and KHUM, temperatures are expected to
remain above freezing, and a moderate rain with prevailing IFR
visibilities and LIFR ceilings is forecast through the end of the
period. At KMCB, KHDC, and KBTR, a shallow pool of below freezing
air will be in place in the lowest few thousand feet of the
atmosphere. A mix of sleet and freezing rain is forecast for these
terminals with significant icing concerns in place. IFR
visibilities and LIFR ceilings will also be in place at these
terminals.

&&

&&

.MARINE...
Small craft advisories for all marine zones beginning 12Z Monday
through 12Z Tuesday as a 1027 MB Arctic high parked over NE Texas
will bring counterclockwise winds which will bring strong
offshore flow into the waters. Winds will lax on Tuesday afternoon
with offshore flow remaining in place until the next system
approaches on Wednesday. A brief return flow will take hold
Wednesday night as a deep area of low pressure develops along a
the right axis of a deep trough over Texas and the southern
Plains. Another strong cold front moves through on Thursday with
small craft advisories likely once again Thursday night.

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  25  30  13  37 /  70  90  10   0
BTR  28  30  17  38 /  80  90  10   0
ASD  34  40  19  42 /  40  80  10   0
MSY  36  40  24  40 /  50  70  10   0
GPT  39  44  21  43 /  20  80  10   0
PQL  40  48  20  44 /  20  70  10   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Hard Freeze Watch from Monday evening through Tuesday morning
     for LAZ034>037-039-040-046>050-056>072.

     Wind Chill Watch from Monday evening through Tuesday morning for
     LAZ034>037-039-040-046>050-056>072.

     Winter Weather Advisory from 6 AM to 6 PM CST Monday for LAZ040-
     058>060-065.

     Winter Storm Warning from midnight tonight to 6 PM CST Monday
     for LAZ034>037-039-046>050-056-057-071-072.

GM...Small Craft Advisory from 6 AM Monday to 6 AM CST Tuesday for
     GMZ530-532-534-536-538-550-552-555-557-570-572-575-577.

MS...Hard Freeze Watch from Monday evening through Tuesday morning
     for MSZ068>071-077-080>082.

     Wind Chill Watch from Monday evening through Tuesday morning for
     MSZ068>071-077-080>082.

     Winter Weather Advisory from 6 AM to 6 PM CST Monday for MSZ077.

     Winter Storm Warning from midnight tonight to 6 PM CST Monday
     for MSZ068>071.

GM...Small Craft Advisory from 6 AM Monday to 6 AM CST Tuesday for
     GMZ532-534-536-538-550-552-555-557-570-572-575-577.

&&

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 14, 7:17 PM CSTHard Freeze WarningLIXEast Feliciana, Pointe Coupee, Saint Helena, Tangipahoa, West Feliciana41 hr
Feb 14, 7:17 PM CSTHard Freeze WarningLIXAssumption, East Baton Rouge, Iberville, Saint Bernard, Saint Helena, Saint James and 4 more41 hr
Feb 14, 9:26 PM CSTGale WarningLIX17 hr
Feb 14, 9:26 PM CSTSmall Craft AdvisoryLIX9 hr
Feb 15, 7:06 AM CSTSpecial Weather StatementLIXSaint James24 min
Feb 15, 7:14 AM CSTSpecial Marine WarningLIX61 min
Feb 15, 8:17 AM CSTSpecial Marine WarningLIX58 min
Feb 15, 8:56 AM CSTSpecial Weather StatementLIXPlaquemines64 min
Feb 15, 9:14 AM CSTSpecial Marine WarningLIX61 min
Feb 15, 9:45 AM CSTSpecial Marine WarningLIX43 min
Feb 15, 10:26 AM CSTSpecial Marine WarningLIX37 min

Nearby

Wind Chill Advisories in Louisiana, 2021Wind Chill Advisories in Mississippi, 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.