Alert archive / Louisiana / Excessive Heat Warnings in 2023
Excessive Heat Warning 21, NWS New Orleans, LA
NWS New Orleans, LA issued this excessive heat warning at Aug 11, 2023, 4:03 PM CDT for 8 counties in Mississippi; 19 parishes in Louisiana. It took effect at Aug 12, 2023, 11:00 AM CDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 11, 2023, 4:03 PM CDT (21:03 UTC)
- In effect from
- Aug 12, 2023, 11:00 AM CDT
- Expired
- Aug 12, 2023, 7:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS New Orleans, LA
All 27 counties
Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Hancock County, MS, Harrison County, MS, Jackson 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 12:00Z, 9.1 hours before the alert went out and 76 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.
- Mixed-layer CAPE
- 2699 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 712 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
The text
As transmitted.
511 WWUS74 KLIX 112103 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 403 PM CDT Fri Aug 11 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-120515- /O.UPG.KLIX.EH.A.0015.230812T1600Z-230813T0000Z/ /O.NEW.KLIX.EH.W.0021.230812T1600Z-230813T0000Z/ /O.NEW.KLIX.EH.A.0016.230813T1500Z-230814T0000Z/ /O.CON.KLIX.EH.W.0020.000000T0000Z-230812T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 403 PM CDT Fri Aug 11 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...EXCESSIVE HEAT WARNING IN EFFECT FROM 11 AM TO 7 PM CDT SATURDAY... ...EXCESSIVE HEAT WATCH IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... * WHAT...For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 116. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 116 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 116 possible. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the first Excessive Heat Warning, until 7 PM CDT this evening. For the second Excessive Heat Warning, from 11 AM to 7 PM CDT Saturday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
5 follow-up statements
733 WWUS74 KLIX 120018 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 718 PM CDT Fri Aug 11 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-121200- /O.EXP.KLIX.EH.W.0020.000000T0000Z-230812T0000Z/ /O.CON.KLIX.EH.W.0021.230812T1600Z-230813T0000Z/ /O.CON.KLIX.EH.A.0016.230813T1500Z-230814T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 718 PM CDT Fri Aug 11 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM CDT SATURDAY... ...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... * WHAT...For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 116 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 116 possible. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the Excessive Heat Warning, from 11 AM to 7 PM CDT Saturday. For the Excessive Heat Watch, from Sunday morning through Sunday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
240 WWUS74 KLIX 120922 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 422 AM CDT Sat Aug 12 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-121730- /O.CON.KLIX.EH.W.0021.230812T1600Z-230813T0000Z/ /O.CON.KLIX.EH.A.0016.230813T1500Z-230814T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 422 AM CDT Sat Aug 12 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CDT THIS EVENING... ...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING... * WHAT...For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 116 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 116 possible. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the Excessive Heat Warning, from 11 AM to 7 PM CDT Saturday. For the Excessive Heat Watch, from 11 AM to 7 PM CDT Sunday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
487 WWUS74 KLIX 121956 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 256 PM CDT Sat Aug 12 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-130400- /O.UPG.KLIX.EH.A.0016.230813T1500Z-230814T0000Z/ /O.NEW.KLIX.EH.W.0022.230813T1500Z-230814T0000Z/ /O.CON.KLIX.EH.W.0021.000000T0000Z-230813T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 256 PM CDT Sat Aug 12 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...EXCESSIVE HEAT WARNING IN EFFECT FROM 10 AM TO 7 PM CDT SUNDAY... * WHAT...Dangerously hot conditions with heat index values up to 116. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the first Excessive Heat Warning, until 7 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 7 PM CDT Sunday. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
557 WWUS74 KLIX 122003 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 303 PM CDT Sat Aug 12 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-130415- /O.NEW.KLIX.EH.A.0017.230814T1500Z-230815T0000Z/ /O.CON.KLIX.EH.W.0021.000000T0000Z-230813T0000Z/ /O.CON.KLIX.EH.W.0022.230813T1500Z-230814T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 303 PM CDT Sat Aug 12 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 7 PM CDT SUNDAY... ...EXCESSIVE HEAT WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... * WHAT...For the first Excessive Heat Warning, dangerously hot conditions with heat index values up to 116. For the second Excessive Heat Warning, dangerously hot conditions with heat index values up to 116 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 115 possible. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the first Excessive Heat Warning, until 7 PM CDT this evening. For the second Excessive Heat Warning, from 10 AM to 7 PM CDT Sunday. For the Excessive Heat Watch, from Monday morning through Monday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
770 WWUS74 KLIX 130006 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 706 PM CDT Sat Aug 12 2023 LAZ034>037-039-046>048-056>060-064>071-076>090-MSZ068>071-077- 083>088-130815- /O.EXP.KLIX.EH.W.0021.000000T0000Z-230813T0000Z/ /O.CON.KLIX.EH.W.0022.230813T1500Z-230814T0000Z/ /O.CON.KLIX.EH.A.0017.230814T1500Z-230815T0000Z/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Assumption-St. James- St. John The Baptist-Upper Lafourche-St. Charles- Upper St. Bernard-Upper Terrebonne-Lower Terrebonne- Lower Lafourche-Coastal Jefferson Parish-Lower Plaquemines- Lower St. Bernard-Northern Tangipahoa-Southeast St. Tammany- Western Orleans-Eastern Orleans-Northern St. Tammany- Southwestern St. Tammany-Central Tangipahoa-Lower Tangipahoa- Northern Livingston-Southern Livingston-Western Ascension- Eastern Ascension-Upper Jefferson-Lower Jefferson- Upper Plaquemines-Central Plaquemines-Wilkinson-Amite-Pike- Walthall-Pearl River-Northern Hancock-Northern Harrison- Northern Jackson-Southern Hancock-Southern Harrison- Southern Jackson- 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, Pierre Part, Labadieville, Paincourtville, Convent, Lutcher, Gramercy, Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Chalmette, Meraux, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Grand Isle, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Delacroix, Shell Beach, Amite, Kentwood, Roseland, Wilmer, Slidell, New Orleans, East New Orleans, Covington, Folsom, Bush, Mandeville, Madisonville, Hammond, Tickfaw, Independence, Robert, Ponchatoula, Akers, Denham Springs, Walker, Livingston, Springfield, Killian, Whitehall, French Settlement, Sorrento, Acy, Gonzales, Prairieville, Geismar, Donaldsonville, Metairie, Kenner, Harahan, Westwego, Marrero, Gretna, Lafitte, Barataria, Jean Lafitte, Belle Chasse, Braithwaite, Alliance, Centreville, Dolorosa, Fort Adams, Woodville, Gillsburg, Gloster, Smithdale, Liberty, McComb, Dexter, Salem, Tylertown, Crossroads, McNeil, Poplarville, Picayune, Necaise, Sellers, Saucier, Lyman, Wade, Vancleave, Escatawpa, Kiln, Pearlington, Waveland, Bay St. Louis, Diamondhead, Pass Christian, Long Beach, Gulfport, Biloxi, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 706 PM CDT Sat Aug 12 2023 ...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 7 PM CDT SUNDAY... ...EXCESSIVE HEAT WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... * WHAT...For the Excessive Heat Warning, dangerously hot conditions with heat index values up to 116 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values up to 115 possible. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...For the Excessive Heat Warning, from 10 AM to 7 PM CDT Sunday. For the Excessive Heat Watch, from Monday morning through Monday evening. * IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$
What forecasters said that day
The local office's own words before this excessive heat warning 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 excessive heat warning went out at Aug 11, 11:16 AM CDT, 4 hours 47 minutes earlier.
Area forecast discussion, Aug 11, 11:16 AM CDT, 4 hours 47 minutes before
Area Forecast Discussion
National Weather Service New Orleans LA
1116 AM CDT Fri Aug 11 2023
...New AVIATION...
.UPDATE...
Issued at 903 AM CDT Fri Aug 11 2023
Preformed a brief forecast update this morning to reflect the
latest suite of guidance - focusing on the heat yet again. Exact
numbers didn't change much from the morning forecast. Keeping the
deterministic which has been performing very well the past few
days, hovering at or slightly above the 75th percentile of NBM
ensembles. As far as records go:
KBTR:
Record for Today: 104 in 2007
Fcst High: 103
NBM % breaking record high: 2%
KMSY:
Record for Today: 100 in 2007
Fcst High: 101
NBM % breaking record high: 66%
KGPT:
Record for Today: 99 in 1939
Fcst High: 99
NBM % breaking record 76%
KMCB:
Record for Today: 102 in 2007
Fcst High: 99
NBM % breaking record 2%
KASD:
Record for Today: 102 in 2007
Fcst High: 101
NBM % breaking record: 6%
Looking like MSY and GPT's records will be threatened today. But
the big story will be impacts regarding excessively hot heat
indicies in the 113-115F range which is a continuation of what
we've been seeing for days - causing for concern given the
elongated stretch we are seeing to extreme stress on those
sensitive to this type of heat.
Otherwise, this slight stair-stepping of forecast highs will
persist into the weekend as the anomalously strong 594DM ridge
re-centers itself over our area meaning, these conditions will
absolutely persist into the weekend. Otherwise, dry as a bone
thanks to this ridge but can't rule out an isolated shower or two
near coastal areas or around local forcing caused by
lake/seabreeze boundaries. As always, will dive deeper in the
afternoon package.
&&
.SHORT TERM...
(Today through Saturday)
Issued at 340 AM CDT Fri Aug 11 2023
Today and Saturday should be some very warm days with little to no
precip around. The Bermuda and SW CONUS highs continue to dominate
roughly around the 25-35N region. Normally there would be a break by
now between these two semi-permanent features, but not so far this
summer. This will occur eventually, as the sun's zenith angle gets
lower in the southern sky and no longer capable of such strong
heating. We are almost 2 months removed from the summer solstice
which means there is already a lower angle and less direct heating
which will eventually weaken these two semi-permanent features. When
this weakness occurs it is almost always along or somewhere around
the Miss River Valley. This could occur rapidly or slowly depending
on how strong the synoptic pattern is. And this is one strong
pattern. In strong patterns, these are normally broken rapidly. But
that is yet to be seen.
&&
.LONG TERM...
(Saturday night through Thursday)
Issued at 340 AM CDT Fri Aug 11 2023
PW values will begin to rise slooooowly over the weekend into the
first of next week. The easterly wave over the Bahamas this morning
will impart some of this moisture by late Monday into Tuesday as it
gets layed down on its northern end. But if one remembers a cold
front spoke of in earlier writtings, confidence is building in this
cold front moving toward our area by Tuesday before stalling.
Whether it gets into the area or not will continue to be the
conversation. We should begin to see a SE surge of cooler dry air
rapidly advancing through the foothills of the Rockies late Saturday
out of western Canada into Montana. Once we see this, it will lock a
much higher confidence level for a visit from a true cold front in
which its origin area is the NW tundra country of Canada and
normally we would call this an arctic front only due to its origin
area. But it definitely isn't a Pacific front. Anyway, eventhough
modified quite a bit, there will be a thermal gradient with it and
this may be seen into Tuesday as it approaches with highs in the
upper 80s to lower 90s behind it and still in the upper 90s ahead of
it. Compresive warming ahead of the front may keep the area in and
around 100F Monday and we will need to see how Tuesday shapes up as
this boundary would provide the weakness necessary for numerous
sh/ts to develop along with PWs moving north of 2" could keep temps
from getting out of the 90s. Either which way, there looks to be a
break coming in the heat. This rapid weakness developing between the
two synoptic highs is evidence that these features could be
weakening. But once this weakness occurs and remains, it will open
the gulf up as well, and we will not speak of anything past next
Friday since the extended portion of any fcast is climo driven and
speculative at best and any time past that is simply conjecture.
&&
.AVIATION...
(18Z TAFS)
Issued at 1112 AM CDT Fri Aug 11 2023
Expect VFR conditions for all area terminals through the TAF
cycle. Will see occasional breezy sfc winds from 1800 thru 2300Z
today bearing mainly 220 to 250 at 8-10kt, with gusts up to 15-20
knots but should weaken after sunset. Could see some very brief
MVFR CIGs around daybreak for coastal sites, but impacts will be
limited.
&&
.MARINE...
Issued at 340 AM CDT Fri Aug 11 2023
Surface high pressure remains through this week. Most areas will
stay in a 10-15kt regime with lighter winds during the daylight
hours. The nocturnal jet that develops mainly across the sounds will
be the only areas that peak around 15 to 20kt during the evening and
predawn morning hours and due to this another caution statement has
been posted for tonight. An easterly wave will move into the outer
waters by late Monday into Tuesday bringing the possibility of sh/ts
across the coastal waters.
&&
.PRELIMINARY POINT TEMPS/POPS...
MCB 99 75 100 75 / 10 0 10 0
BTR 103 81 103 81 / 10 0 10 0
ASD 101 80 101 80 / 10 0 20 10
MSY 101 83 101 82 / 10 0 20 0
GPT 99 81 100 81 / 10 10 20 10
PQL 99 80 100 80 / 10 10 20 10
&&
.LIX WATCHES/WARNINGS/ADVISORIES...
LA...Excessive Heat Warning until 7 PM CDT this evening for
LAZ034>037-039-046>048-056>060-064>071-076>090.
Excessive Heat Watch from Saturday morning through Saturday
evening for LAZ034>037-039-046>048-056>060-064>071-076>090.
GM...None.
MS...Excessive Heat Warning until 7 PM CDT this evening for
MSZ068>071-077-083>088.
Excessive Heat Watch from Saturday morning through Saturday
evening for MSZ068>071-077-083>088.
GM...None.
&&
SHORT TERM...TE
LONG TERM....TE
AVIATION...KLG
MARINE...TEThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 4:03 PM CDT | Excessive Heat Watch | LIX | Amite, Hancock, Harrison, Jackson, Pearl River, Pike and 2 more | 23 hr |
Nearby
Excessive Heat Warnings in Louisiana, 2023Excessive Heat Warnings in Mississippi, 2023Every excessive heat warning in 2023
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.