Alert archive / Louisiana / Flash Flood Watches in 2021
Flash Flood Watch 10, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood watch at Jun 17, 2021, 1:36 PM CDT for 15 parishes in Louisiana; 5 counties in Mississippi. It took effect at Jun 18, 2021, 1:00 PM CDT. It was in force for 24 hr.
The area
The counties it named.
The facts
- Issued
- Jun 17, 2021, 1:36 PM CDT (18:36 UTC)
- In effect from
- Jun 18, 2021, 1:00 PM CDT
- Expired
- Jun 19, 2021, 12:37 PM CDT
- In force
- 24 hr
- Issued by
- NWS New Orleans, LA
- Flood severity
- None
Counties Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Orleans 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, 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, 6.6 hours before the alert went out and 100 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1653 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
768 WGUS64 KLIX 171836 FFALIX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service New Orleans LA 136 PM CDT Thu Jun 17 2021 LAZ034>037-039-046>050-056>061-063>072-075>078-MSZ068>071-077- 080>082-180245- /O.NEW.KLIX.FF.A.0010.210618T1800Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston- Assumption-St. James-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- Including the cities of Convent, Gonzales, Dexter, Chalmette, Covington, Buras, Cut Off, Belle Chasse, White Castle, East New Orleans, Gramercy, Bayou Cane, Amite, Pascagoula, Raceland, Wakefield, Gloster, Waveland, Easleyville, McComb, McNeil, Montpelier, Livonia, Darlington, Gillsberg, Gulfport, Jackson, Spillman, Greensburg, Liberty, Port Allen, Diamondhead, Roseland, Hammond, Metairie, Salem, Boothville, Galliano, Chauvin, Kenner, St. Francisville, Enon, St. Martin, Clinton, Labadieville, Dulac, Thibodaux, Yscloskey, Myrtle Grove, Mandeville, Prairieville, Violet, Dolorosa, Donaldsonville, Lutcher, Ocean Springs, Robert, Bogalusa, Larose, Poplarville, Tylertown, Centreville, Destrehan, Baton Rouge, New Roads, Lettsworth, Picayune, Paincourtville, Pointe A La Hache, Bay St. Louis, Leeville, Franklinton, Gautier, Slidell, Walker, Felps, Laplace, Woodville, Denham Springs, New Orleans, Montegut, Wilmer, Golden Meadow, Cocodrie, Venice, Lacombe, Plaquemine, Fort Adams, Brusly, Bayou Sorrel, Kentwood, Pierre Part, Watson, Houma, Addis, Smithdale, Moss Point, Ponchatoula, Crossroads, Norco, Reserve, Port Sulphur, and Empire 136 PM CDT Thu Jun 17 2021 ...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SUNDAY MORNING... The National Weather Service in New Orleans has issued a * Flash Flood Watch for portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Ascension, Assumption, East Baton Rouge, East Feliciana, Eastern Orleans, Iberville, Livingston, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Pointe Coupee, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. Helena, St. James, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington, West Baton Rouge, West Feliciana and Western Orleans. In Mississippi, Amite, Hancock, Harrison, Jackson, Pearl River, Pike, Walthall and Wilkinson. * From Friday afternoon through Sunday morning. * 6 To 10 inches of rain possible with locally higher amounts. * High rainfall rates could overwhelm drainage capacity leading to ponding of water in low lying and poor drainage areas as well as flash flooding where the heaviest rain falls. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Remember, never drive through flooded roadways as the water may be too deep for safe passage. && $$ GP
8 follow-up statements
822 WGUS64 KLIX 180249 FFALIX Flood Watch National Weather Service New Orleans LA 949 PM CDT Thu Jun 17 2021 LAZ034>037-039-046>050-056>061-063>072-075>078-MSZ068>071-077- 080>082-181300- /O.CON.KLIX.FF.A.0010.210618T1800Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston- Assumption-St. James-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- Including the cities of Convent, Gonzales, Dexter, Chalmette, Covington, Buras, Cut Off, Belle Chasse, White Castle, East New Orleans, Gramercy, Bayou Cane, Amite, Pascagoula, Raceland, Wakefield, Gloster, Waveland, Easleyville, McComb, McNeil, Montpelier, Livonia, Darlington, Gillsberg, Gulfport, Jackson, Spillman, Greensburg, Liberty, Port Allen, Diamondhead, Roseland, Hammond, Metairie, Salem, Boothville, Galliano, Chauvin, Kenner, St. Francisville, Enon, St. Martin, Clinton, Labadieville, Dulac, Thibodaux, Yscloskey, Myrtle Grove, Mandeville, Prairieville, Violet, Dolorosa, Donaldsonville, Lutcher, Ocean Springs, Robert, Bogalusa, Larose, Poplarville, Tylertown, Centreville, Destrehan, Baton Rouge, New Roads, Lettsworth, Picayune, Paincourtville, Pointe A La Hache, Bay St. Louis, Leeville, Franklinton, Gautier, Slidell, Walker, Felps, Laplace, Woodville, Denham Springs, New Orleans, Montegut, Wilmer, Golden Meadow, Cocodrie, Venice, Lacombe, Plaquemine, Fort Adams, Brusly, Bayou Sorrel, Kentwood, Pierre Part, Watson, Houma, Addis, Smithdale, Moss Point, Ponchatoula, Crossroads, Norco, Reserve, Port Sulphur, and Empire 949 PM CDT Thu Jun 17 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM FRIDAY AFTERNOON THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Ascension, Assumption, East Baton Rouge, East Feliciana, Eastern Orleans, Iberville, Livingston, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Pointe Coupee, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. Helena, St. James, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington, West Baton Rouge, West Feliciana and Western Orleans. In Mississippi, Amite, Hancock, Harrison, Jackson, Pearl River, Pike, Walthall and Wilkinson. * From Friday afternoon through Sunday morning. * 6 To 10 inches of rain possible with locally higher amounts. * High rainfall rates could overwhelm drainage capacity leading to ponding of water in low lying and poor drainage areas as well as flash flooding where the heaviest rain falls. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
541 WGUS64 KLIX 180914 FFALIX Flood Watch National Weather Service New Orleans LA 414 AM CDT Fri Jun 18 2021 LAZ034>037-039-046>050-056>061-063>072-075>078-MSZ068>071-077- 080>082-182100- /O.CON.KLIX.FF.A.0010.210618T1800Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston- Assumption-St. James-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- Including the cities of Convent, Gonzales, Dexter, Chalmette, Covington, Buras, Cut Off, Belle Chasse, White Castle, East New Orleans, Gramercy, Bayou Cane, Amite, Pascagoula, Raceland, Wakefield, Gloster, Waveland, Easleyville, McComb, McNeil, Montpelier, Livonia, Darlington, Gillsberg, Gulfport, Jackson, Spillman, Greensburg, Liberty, Port Allen, Diamondhead, Roseland, Hammond, Metairie, Salem, Boothville, Galliano, Chauvin, Kenner, St. Francisville, Enon, St. Martin, Clinton, Labadieville, Dulac, Thibodaux, Yscloskey, Myrtle Grove, Mandeville, Prairieville, Violet, Dolorosa, Donaldsonville, Lutcher, Ocean Springs, Robert, Bogalusa, Larose, Poplarville, Tylertown, Centreville, Destrehan, Baton Rouge, New Roads, Lettsworth, Picayune, Paincourtville, Pointe A La Hache, Bay St. Louis, Leeville, Franklinton, Gautier, Slidell, Walker, Felps, Laplace, Woodville, Denham Springs, New Orleans, Montegut, Wilmer, Golden Meadow, Cocodrie, Venice, Lacombe, Plaquemine, Fort Adams, Brusly, Bayou Sorrel, Kentwood, Pierre Part, Watson, Houma, Addis, Smithdale, Moss Point, Ponchatoula, Crossroads, Norco, Reserve, Port Sulphur, and Empire 414 AM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Ascension, Assumption, East Baton Rouge, East Feliciana, Eastern Orleans, Iberville, Livingston, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Pointe Coupee, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. Helena, St. James, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington, West Baton Rouge, West Feliciana and Western Orleans. In Mississippi, Amite, Hancock, Harrison, Jackson, Pearl River, Pike, Walthall and Wilkinson. * From 1 PM CDT this afternoon through Sunday morning. * 4 To 8 inches of rain possible with locally higher amounts. * High rainfall rates could overwhelm drainage capacity leading to ponding of water in low lying and poor drainage areas as well as flash flooding where the heaviest rain falls. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Remember, never drive through flooded roadways as the water may be too deep for safe passage. && $$
740 WGUS64 KLIX 181505 FFALIX Flood Watch National Weather Service New Orleans LA 1005 AM CDT Fri Jun 18 2021 LAZ034>037-039-046>050-056>061-063>072-075>078-MSZ068>071-077- 080>082-182315- /O.CON.KLIX.FF.A.0010.210618T1800Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Washington- Iberville-West Baton Rouge-East Baton Rouge-Ascension-Livingston- Assumption-St. James-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- Including the cities of Convent, Gonzales, Dexter, Chalmette, Covington, Buras, Cut Off, Belle Chasse, White Castle, East New Orleans, Gramercy, Bayou Cane, Amite, Pascagoula, Raceland, Wakefield, Gloster, Waveland, Easleyville, McComb, McNeil, Montpelier, Livonia, Darlington, Gillsberg, Gulfport, Jackson, Spillman, Greensburg, Liberty, Port Allen, Diamondhead, Roseland, Hammond, Metairie, Salem, Boothville, Galliano, Chauvin, Kenner, St. Francisville, Enon, St. Martin, Clinton, Labadieville, Dulac, Thibodaux, Yscloskey, Myrtle Grove, Mandeville, Prairieville, Violet, Dolorosa, Donaldsonville, Lutcher, Ocean Springs, Robert, Bogalusa, Larose, Poplarville, Tylertown, Centreville, Destrehan, Baton Rouge, New Roads, Lettsworth, Picayune, Paincourtville, Pointe A La Hache, Bay St. Louis, Leeville, Franklinton, Gautier, Slidell, Walker, Felps, Laplace, Woodville, Denham Springs, New Orleans, Montegut, Wilmer, Golden Meadow, Cocodrie, Venice, Lacombe, Plaquemine, Fort Adams, Brusly, Bayou Sorrel, Kentwood, Pierre Part, Watson, Houma, Addis, Smithdale, Moss Point, Ponchatoula, Crossroads, Norco, Reserve, Port Sulphur, and Empire 1005 AM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Ascension, Assumption, East Baton Rouge, East Feliciana, Eastern Orleans, Iberville, Livingston, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Pointe Coupee, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. Helena, St. James, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington, West Baton Rouge, West Feliciana and Western Orleans. In Mississippi, Amite, Hancock, Harrison, Jackson, Pearl River, Pike, Walthall and Wilkinson. * Through Sunday morning. * Potential Tropical Cyclone continues to slowly organize in the north-central Gulf and is expected to become a Depression or Tropical Storm later today. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAB
512 WGUS64 KLIX 182008 FFALIX Flood Watch National Weather Service New Orleans LA 308 PM CDT Fri Jun 18 2021 LAZ034>037-046>050-056-057-MSZ068-069-182115- /O.CAN.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pointe Coupee-West Feliciana-East Feliciana-St. Helena-Iberville- West Baton Rouge-East Baton Rouge-Ascension-Livingston-Assumption- St. James-Wilkinson-Amite- Including the cities of Gillsberg, Dolorosa, Donaldsonville, Jackson, Spillman, Gonzales, Greensburg, Liberty, Denham Springs, Port Allen, Lutcher, Plaquemine, Centreville, Watson, Fort Adams, Brusly, Bayou Sorrel, Gramercy, Baton Rouge, Lettsworth, Pierre Part, New Roads, Felps, Addis, Paincourtville, Smithdale, St. Francisville, Wakefield, Gloster, Easleyville, Walker, Woodville, Labadieville, White Castle, Clinton, Convent, Prairieville, Montpelier, Livonia, and Darlington 308 PM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southeast Louisiana and southern Mississippi, including the following areas and parishes, in southeast Louisiana, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston, Pointe Coupee, St. Helena, St. James, West Baton Rouge and West Feliciana. In southern Mississippi, Amite and Wilkinson has been cancelled. The Flood Watch is cancelled. $$ LAZ039-058>061-063>072-075>078-MSZ070-071-077-080>082-190515- /O.CON.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Pike- Walthall-Pearl River-Hancock-Harrison-Jackson- Including the cities of Cocodrie, Venice, Gulfport, Ocean Springs, Robert, Bogalusa, Dexter, Chalmette, Empire, Larose, Galliano, Poplarville, Buras, Tylertown, Golden Meadow, Wilmer, Ponchatoula, Cut Off, Belle Chasse, Destrehan, Roseland, East New Orleans, Bayou Cane, Hammond, Metairie, Kentwood, Lacombe, Houma, Salem, Franklinton, Picayune, Thibodaux, Boothville, Bay St. Louis, Leeville, Kenner, Pascagoula, Chauvin, Moss Point, Diamondhead, Amite, Raceland, Enon, Crossroads, Slidell, Waveland, St. Martin, Gautier, Norco, Laplace, Reserve, Port Sulphur, Yscloskey, Myrtle Grove, McComb, Pointe A La Hache, Mandeville, McNeil, Covington, New Orleans, Montegut, Violet, and Dulac 308 PM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Eastern Orleans, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington and Western Orleans. In Mississippi, Hancock, Harrison, Jackson, Pearl River, Pike and Walthall. * Through Sunday morning. * Potential Tropical Cyclone 3 continues to approach the coast but rain bands have already been coming onshore with the bulk of the heavy rain expected this evening and through Saturday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAB
578 WGUS64 KLIX 182034 FFALIX Flood Watch National Weather Service New Orleans LA 334 PM CDT Fri Jun 18 2021 LAZ039-058>061-063>072-075>078-MSZ070-071-077-080>082-190500- /O.CON.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Pike- Walthall-Pearl River-Hancock-Harrison-Jackson- Including the cities of Cocodrie, Venice, Gulfport, Ocean Springs, Robert, Bogalusa, Dexter, Chalmette, Empire, Larose, Galliano, Poplarville, Buras, Tylertown, Golden Meadow, Wilmer, Ponchatoula, Cut Off, Belle Chasse, Destrehan, Roseland, East New Orleans, Bayou Cane, Hammond, Metairie, Kentwood, Lacombe, Houma, Salem, Franklinton, Picayune, Thibodaux, Boothville, Bay St. Louis, Leeville, Kenner, Pascagoula, Chauvin, Moss Point, Diamondhead, Amite, Raceland, Enon, Crossroads, Slidell, Waveland, St. Martin, Gautier, Norco, Laplace, Reserve, Port Sulphur, Yscloskey, Myrtle Grove, McComb, Pointe A La Hache, Mandeville, McNeil, Covington, New Orleans, Montegut, Violet, and Dulac 334 PM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Eastern Orleans, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington and Western Orleans. In Mississippi, Hancock, Harrison, Jackson, Pearl River, Pike and Walthall. * Through Sunday morning. * Potential Tropical Cyclone 3 continues to approach the coast but rain bands have already been coming onshore with the bulk of the heavy rain expected this evening and through Saturday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ CAB
347 WGUS64 KLIX 190259 FFALIX Flood Watch National Weather Service New Orleans LA 959 PM CDT Fri Jun 18 2021 LAZ039-058>061-063>072-075>078-MSZ070-071-077-080>082-191300- /O.CON.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Pike- Walthall-Pearl River-Hancock-Harrison-Jackson- Including the cities of Cocodrie, Venice, Gulfport, Ocean Springs, Robert, Bogalusa, Dexter, Chalmette, Empire, Larose, Galliano, Poplarville, Buras, Tylertown, Golden Meadow, Wilmer, Ponchatoula, Cut Off, Belle Chasse, Destrehan, Roseland, East New Orleans, Bayou Cane, Hammond, Metairie, Kentwood, Lacombe, Houma, Salem, Franklinton, Picayune, Thibodaux, Boothville, Bay St. Louis, Leeville, Kenner, Pascagoula, Chauvin, Moss Point, Diamondhead, Amite, Raceland, Enon, Crossroads, Slidell, Waveland, St. Martin, Gautier, Norco, Laplace, Reserve, Port Sulphur, Yscloskey, Myrtle Grove, McComb, Pointe A La Hache, Mandeville, McNeil, Covington, New Orleans, Montegut, Violet, and Dulac 959 PM CDT Fri Jun 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Louisiana and Mississippi, including the following areas and parishes, in southeast Louisiana, Eastern Orleans, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington and Western Orleans. In Mississippi, Hancock, Harrison, Jackson, Pearl River, Pike and Walthall. * Through Sunday morning. * Potential Tropical Cyclone 3 continues to approach the coast but rain bands have been coming onshore with heavy rain expected to continue through Saturday morning. * High rainfall rates could overwhelm drainage capacity leading to ponding of water in low lying and poor drainage areas as well as flash flooding where the heaviest rain falls. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Remember, never drive through flooded roadways as the water may be too deep for safe passage. && $$
262 WGUS64 KLIX 190859 FFALIX Flood Watch National Weather Service New Orleans LA 359 AM CDT Sat Jun 19 2021 LAZ039-058>061-063>072-075>078-MSZ070-071-191000- /O.CAN.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Washington-St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson-Upper Plaquemines-Upper St. Bernard-Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson-Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa-Southern Tangipahoa-Northwest St. Tammany-Southeast St. Tammany-Western Orleans-Eastern Orleans-Pike- Walthall- Including the cities of Cocodrie, Venice, Robert, Bogalusa, Dexter, Chalmette, Empire, Larose, Galliano, Buras, Tylertown, Golden Meadow, Wilmer, Ponchatoula, Cut Off, Belle Chasse, Destrehan, Roseland, East New Orleans, Bayou Cane, Hammond, Metairie, Kentwood, Lacombe, Houma, Salem, Franklinton, Thibodaux, Boothville, Leeville, Kenner, Chauvin, Amite, Raceland, Enon, Slidell, Norco, Laplace, Reserve, Port Sulphur, Yscloskey, Myrtle Grove, McComb, Pointe A La Hache, Mandeville, Covington, New Orleans, Montegut, Violet, and Dulac 359 AM CDT Sat Jun 19 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southeast Louisiana and southern Mississippi, including the following areas and parishes, in southeast Louisiana, Eastern Orleans, Lower Jefferson, Lower Lafourche, Lower Plaquemines, Lower St. Bernard, Lower Terrebonne, Northern Tangipahoa, Northwest St. Tammany, Southeast St. Tammany, Southern Tangipahoa, St. Charles, St. John The Baptist, Upper Jefferson, Upper Lafourche, Upper Plaquemines, Upper St. Bernard, Upper Terrebonne, Washington and Western Orleans. In southern Mississippi, Pike and Walthall has been cancelled. The Flood Watch is cancelled. The threat of organized heavy rainfall has moved east of the area. $$ MSZ077-080>082-191700- /O.CON.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pearl River-Hancock-Harrison-Jackson- Including the cities of Bay St. Louis, Diamondhead, Gulfport, Pascagoula, Moss Point, Ocean Springs, McNeil, Gautier, Crossroads, Waveland, St. Martin, Poplarville, and Picayune 359 AM CDT Sat Jun 19 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY MORNING... The Flash Flood Watch continues for * Portions of southeast Mississippi and southern Mississippi, including the following areas, in southeast Mississippi, Harrison. In southern Mississippi, Hancock, Jackson and Pearl River. * Through Sunday morning. * Tropical Storm Claudette continues to move across southeast Louisiana with heavy rain bands moving across portions of south Mississippi east of the Pearl River. Rain amounts of 5 to 10 inches with locally higher amounts are possible this morning in portions of the watch area. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
060 WGUS64 KLIX 191737 FFALIX Flood Watch National Weather Service New Orleans LA 1237 PM CDT Sat Jun 19 2021 MSZ077-080>082-191845- /O.CAN.KLIX.FF.A.0010.000000T0000Z-210620T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Pearl River-Hancock-Harrison-Jackson- Including the cities of Bay St. Louis, Diamondhead, Gulfport, Pascagoula, Moss Point, Ocean Springs, McNeil, Gautier, Crossroads, Waveland, St. Martin, Poplarville, and Picayune 1237 PM CDT Sat Jun 19 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southeast Mississippi and southern Mississippi, including the following areas, in southeast Mississippi, Harrison. In southern Mississippi, Hancock, Jackson and Pearl River has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ CAB
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Jun 17, 4:23 AM CDT, 9 hours 13 minutes earlier.
Area forecast discussion, Jun 17, 4:23 AM CDT, 9 hours 13 minutes before
Area Forecast Discussion National Weather Service New Orleans LA 423 AM CDT Thu Jun 17 2021 .SYNOPSIS... Surface boundary separating dew points in the 60s from much more humid air is currently over our coastal waters and is reasonably depicted on radar by a narrow band of showers and a few thunderstorms. Upper ridging still over the southern Rockies, with an upper trough over New England. Skies mostly clear across the area, with comfortable temperatures in the mid and upper 60s across most of the northern half of the area, and in the 70s for most of the southern areas. New Orleans metro remains a little warmer, as northeast winds are coming off Lake Pontchartrain water temperatures that are in the upper 80s. && .SHORT TERM (through Saturday night)... Eyes will be on the Bay of Campeche today, monitoring the area of disturbed weather in that area. Should start to see some northward movement by late in the day, and if something is going to organize, that should start happening overnight. Today will be rather quiet regarding precipitation, with any showers and storms remaining offshore. Dew points will remain in the 60s in most areas, making conditions fairly comfortable, considering it's mid-June. While NBM high temperature values today are a couple of degrees above operational guidance, somewhat concerned that those values may not even be warm enough, considering most of our CWA was in the mid 90s yesterday. We're in line with our neighbors right now, so will brief the day shift to keep an eye on it. As the Bay of Campeche disturbance begins moving northward tonight, so will the surface boundary, and moisture will rush back to the north. BUFR soundings for New Orleans show precipitable water values less than an inch this afternoon already back to 1.6 by Friday morning, and over 2 inches by midday Friday. Precipitation chances will increase during the day on Friday from south to north with likely to categorical PoPs by Friday evening. Main threat of heavy rain will occur overnight Friday night through Saturday. The area of most significant threat for heavy rain and severe weather will be displaced to the right of any circulation center. Still quite a bit of uncertainty on a track, but there are enough indications that some portions of our area will see very heavy rainfall over about a 36 hour period, potentially 5-10 inches with locally higher amounts. Precipitable water values expected to end up somewhere around 2.5 inches, which is at the upper end of climatology for late June, so those amounts are certainly achievable, even with a system like this. Right now, best estimates would be from about Interstate 55 eastward, but that definitely could shift one way or the other. As a track becomes better defined, Flash Flood Watches will likely be issued later today for portions of the area late Friday into Saturday. Isolated tornadoes could definitely be an issue with rainbands to the east of the low. NAM BUFR soundings showing 0-3KM helicities well over 400 east of the track. Onshore winds will push tide levels up as well. Fortunately, we're near neap tide ranges. Current indications are surge levels should be in the 1-2 foot range, but again, that'll be dependent on strength and track of the system. System should track northeast away from the area Saturday night with the heavy rain threat diminishing. Temperature guidance for Friday/Saturday looks reasonable considering precipitation trends. 35 && .LONG TERM (Sunday and beyond)... The primary concern for the first half of next week will be the passage of a northern stream longwave trough and associated frontal boundary next Tuesday into Wednesday. In advance of this feature, a largely zonal flow regime in the upper levels will combine with weak low to mid-level ridging to produce warmer and more diurnally induced convection for Sunday and Monday. Additionally, a lingering theta e axis and region of higher precipitable water values could keep rain chances a bit more elevated than expected for the overlying upper level pattern on Sunday. Starting with Sunday, the low pressure system impacting the area late this week will be quickly departing to the east and northeast with the primary forcing and rain impacts advecting into the Mid- Atlantic states. However, an axis of higher precipitable water values is expected to trail behind this low pressure system and stretch in a southwest oriented fashion back into the Gulf of Mexico on Sunday. Precipitable water values will be lower than observed on Saturday, but should still remain fairly elevated in the 1.75 to 2 inch range through Sunday evening. Although upper level support will be trending downward, there should be enough residual omega in place to support scattered to numerous showers and thunderstorms through the day, and the threat of some locally heavy downpours and street flooding issues will persist. Temperatures will be near to slightly below normal given the expected amount of shower and thunderstorm in place through the day. By Sunday night, conditions will begin to improve as instability decreases and some weak negative vorticity advection develops aloft. By Monday, a more typical Summer pattern of diurnally induced convection is expected to take hold. The flow pattern aloft will be zonal in nature, and a deep layer southwest flow pattern will be in place in the low to mid-levels. The one caveat is that precipitable water values will remain elevated as an axis of deeper moisture remains over the region with readings of around 2 inches expected. This moisture will tap into a fairly unstable airmass to produce scattered showers and thunderstorms throughout much of the day, and once again some locally heavy downpours and isolated street flooding events will be the primary concern. The threat of stronger storms will increase on Tuesday and Wednesday as a northern stream trough axis and an associated surface front push through the area. A band of convection could accompany the front on Tuesday, and have higher POP in the likely range of around 60 percent to reflect this risk. Temperatures are also forecast to be a few degrees cooler than average due to the expected increase in cloud cover and thunderstorm activity. After reviewing model soundings, the profile looks favorable for a few wind events to potentially occur, and this is supported by DCAPE values in excess of 1000 J/KG both Tuesday and Wednesday afternoons. This pattern and the potential for a few strong to possibly severe thunderstorms will need to monitored over the weekend. PG && .AVIATION... VFR conditions will persist at all of the terminals this morning. Winds will generally be from the east and northeast through the morning hours, and a shift to the southeast is expected during the afternoon hours. Overall, no significant impacts to aviation are expected through 12z Friday, but will expect deteriorating conditions 12z-18z Friday for at least the southern terminals. && .MARINE... Seeing borderline Small Craft Exercise Caution conditions early this morning in some of the waters, but those winds are on a downward trend and won't carry the headlines. Conditions are expected to deteriorate late tonight, with Small Craft Advisories likely to be necessary Friday through Sunday if we don't end up with tropical headlines. && .PRELIMINARY POINT TEMPS/POPS... MCB 91 68 87 72 / 0 0 50 50 BTR 91 71 87 74 / 0 0 70 60 ASD 92 73 86 75 / 0 10 80 70 MSY 93 78 87 77 / 0 20 80 80 GPT 91 75 85 76 / 0 20 80 70 PQL 91 73 85 74 / 0 20 70 70 && .LIX WATCHES/WARNINGS/ADVISORIES... LA...None. GM...None. MS...None. GM...None. &&
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 9:45 AM CDT | River Flood Warning | LIX | Saint Tammany | 58 hr |
| Jun 17, 1:30 PM CDT | Coastal Flood Warning | LIX | Orleans, Saint Bernard, Saint Tammany | 47 hr |
| Jun 17, 1:30 PM CDT | Coastal Flood Advisory | LIX | Orleans, Saint Bernard, Saint John the Baptist, Saint Tammany | 54 hr |
| Jun 17, 4:02 PM CDT | Tropical Storm Warning | LIX | Assumption, Orleans, Saint Bernard, Saint James, Saint John the Baptist, Saint Tammany | 48 hr |
Nearby
Flash Flood Watches in Louisiana, 2021Flash Flood Watches in Mississippi, 2021Every flash flood 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.