Alert archive / Louisiana / Wind Advisories in 2021
Wind Advisory 10, NWS New Orleans, LA
NWS New Orleans, LA issued this wind advisory at May 20, 2021, 3:56 PM CDT for 4 parishes in Louisiana. It took effect at May 20, 2021, 5:18 PM CDT. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- May 20, 2021, 3:56 PM CDT (20:56 UTC)
- In effect from
- May 20, 2021, 5:18 PM CDT
- Expired
- May 21, 2021, 7:00 PM CDT
- In force
- 26 hr
- Issued by
- NWS New Orleans, LA
Counties Orleans Parish, LA, Saint Bernard Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.9 hours before the alert went out and 36 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
- 622 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
028 WWUS74 KLIX 202056 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 356 PM CDT Thu May 20 2021 LAZ058>061-063>070-072-075>078-MSZ080>082-210500- /O.NEW.KLIX.WI.Y.0010.210521T1200Z-210522T0000Z/ /O.CON.KLIX.WI.Y.0009.000000T0000Z-210521T0000Z/ 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-Southern Tangipahoa- Northwest St. Tammany-Southeast St. Tammany-Western Orleans- Eastern Orleans-Hancock-Harrison-Jackson- Including the cities of Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Metairie, Kenner, 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, Hammond, Robert, Ponchatoula, Mandeville, Covington, Lacombe, Slidell, New Orleans, East New Orleans, Bay St. Louis, Waveland, Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 356 PM CDT Thu May 20 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... ...WIND ADVISORY IN EFFECT FROM 7 AM TO 7 PM CDT FRIDAY... * WHAT...Southeast winds 15 to 25 mph with gusts up to 30 mph. * WHERE...Coastal areas of Mississippi and southeast Louisiana. * WHEN...For the first Wind Advisory, until 7 PM CDT this evening. For the second Wind Advisory, from 7 AM to 7 PM CDT Friday. * IMPACTS...Gusty winds could blow around unsecured household objects such as trash cans. Tree limbs could be blown down and a few power outages may result. Sudden gusts could make driving difficult on elevated roadways and bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... Secure loose outdoor items. Use extra caution when driving, especially if operating a high profile vehicle. && $$
4 follow-up statements
338 WWUS74 KLIX 202218 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 518 PM CDT Thu May 20 2021 LAZ058>061-063>070-072-075>078-MSZ080>082-210630- /O.CAN.KLIX.WI.Y.0009.000000T0000Z-210521T0000Z/ /O.EXT.KLIX.WI.Y.0010.210520T2218Z-210522T0000Z/ St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson- Upper Plaquemines-Upper St. Bernard-Upper Terrebonne- Lower Terrebonne-Lower Lafourche-Lower Jefferson- Lower Plaquemines-Lower St. Bernard-Southern Tangipahoa- Northwest St. Tammany-Southeast St. Tammany-Western Orleans- Eastern Orleans-Hancock-Harrison-Jackson- Including the cities of Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Metairie, Kenner, Belle Chasse, Chalmette, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Hammond, Robert, Ponchatoula, Mandeville, Covington, Lacombe, Slidell, New Orleans, East New Orleans, Bay St. Louis, Waveland, Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 518 PM CDT Thu May 20 2021 ...WIND ADVISORY NOW IN EFFECT UNTIL 7 PM CDT FRIDAY... * WHAT...East winds 20 to 30 mph with gusts up to 40 mph. * WHERE...Coastal areas of Mississippi and southeast Louisiana. * WHEN...Until 7 PM CDT Friday. * IMPACTS...Gusty winds could blow around unsecured household objects such as trash cans. Tree limbs could be blown down and a few power outages may result. Sudden gusts could make driving difficult on elevated roadways and bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
648 WWUS74 KLIX 210334 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 1034 PM CDT Thu May 20 2021 LAZ058>061-063>070-072-075>078-MSZ080>082-211145- /O.CON.KLIX.WI.Y.0010.000000T0000Z-210522T0000Z/ 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-Southern Tangipahoa- Northwest St. Tammany-Southeast St. Tammany-Western Orleans- Eastern Orleans-Hancock-Harrison-Jackson- Including the cities of Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Metairie, Kenner, 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, Hammond, Robert, Ponchatoula, Mandeville, Covington, Lacombe, Slidell, New Orleans, East New Orleans, Bay St. Louis, Waveland, Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 1034 PM CDT Thu May 20 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT FRIDAY... * WHAT...East winds 20 to 30 mph with gusts up to 40 mph. * WHERE...Coastal areas of Mississippi and southeast Louisiana. * WHEN...Until 7 PM CDT Friday. * IMPACTS...Gusty winds could blow around unsecured household objects such as trash cans. Tree limbs could be blown down and a few power outages may result. Sudden gusts could make driving difficult on elevated roadways and bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
090 WWUS74 KLIX 210838 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 338 AM CDT Fri May 21 2021 LAZ058>061-063>070-072-075>078-MSZ080>082-211645- /O.CON.KLIX.WI.Y.0010.000000T0000Z-210522T0000Z/ St. John The Baptist-Upper Lafourche-St. Charles-Upper Jefferson- Upper Plaquemines-Upper St. Bernard-Upper Terrebonne- Lower Terrebonne-Lower Lafourche-Lower Jefferson- Lower Plaquemines-Lower St. Bernard-Southern Tangipahoa- Northwest St. Tammany-Southeast St. Tammany-Western Orleans- Eastern Orleans-Hancock-Harrison-Jackson- Including the cities of Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Metairie, Kenner, Belle Chasse, Chalmette, Violet, Houma, Bayou Cane, Chauvin, Cocodrie, Dulac, Montegut, Galliano, Cut Off, Golden Meadow, Leeville, Buras, Pointe A La Hache, Port Sulphur, Boothville, Venice, Empire, Myrtle Grove, Yscloskey, Hammond, Robert, Ponchatoula, Mandeville, Covington, Lacombe, Slidell, New Orleans, East New Orleans, Bay St. Louis, Waveland, Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 338 AM CDT Fri May 21 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...East winds 20 to 30 mph with gusts up to 40 mph. * WHERE...Coastal areas of Mississippi and southeast Louisiana. * WHEN...Until 7 PM CDT Friday. * IMPACTS...Gusty winds could blow around unsecured household objects such as trash cans. Tree limbs could be blown down and a few power outages may result. Sudden gusts could make driving difficult on elevated roadways and bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
408 WWUS74 KLIX 211708 NPWLIX URGENT - WEATHER MESSAGE National Weather Service New Orleans LA 1208 PM CDT Fri May 21 2021 LAZ058>061-063>070-072-075>078-MSZ080>082-220000- /O.CON.KLIX.WI.Y.0010.000000T0000Z-210522T0000Z/ 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-Southern Tangipahoa- Northwest St. Tammany-Southeast St. Tammany-Western Orleans- Eastern Orleans-Hancock-Harrison-Jackson- Including the cities of Laplace, Reserve, Thibodaux, Raceland, Larose, Destrehan, Norco, Metairie, Kenner, 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, Hammond, Robert, Ponchatoula, Mandeville, Covington, Lacombe, Slidell, New Orleans, East New Orleans, Bay St. Louis, Waveland, Diamondhead, Gulfport, Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin 1208 PM CDT Fri May 21 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...East winds 20 to 30 mph with gusts up to 40 mph. * WHERE...Coastal areas of Mississippi and southeast Louisiana. * WHEN...Until 7 PM CDT Friday. * IMPACTS...Gusty winds could blow around unsecured household objects such as trash cans. Tree limbs could be blown down and a few power outages may result. Sudden gusts could make driving difficult on elevated roadways and bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ TD
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:03 PM CDT | Special Weather Statement | LIX | Saint Tammany | 42 min |
| May 19, 7:24 PM CDT | Special Marine Warning | LIX | 81 min | |
| May 19, 8:00 PM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 25 min |
| May 19, 8:30 PM CDT | Special Marine Warning | LIX | 30 min | |
| May 19, 9:19 PM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Iberville, Livingston | 116 min |
| May 20, 3:42 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Iberville, Jefferson, Plaquemines, Saint Charles and 3 more | 63 min |
| May 20, 4:05 AM CDT | Special Marine Warning | LIX | 55 min | |
| May 20, 4:18 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:03 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:33 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 7:00 AM CDT | Special Weather Statement | LIX | Assumption, Jefferson, Lafourche, Saint Charles, Saint James | 60 min |
| May 20, 7:39 AM CDT | Tornado Warning | LIX | Jefferson | 8 min |
| May 20, 7:42 AM CDT | Special Marine Warning | LIX | 33 min | |
| May 20, 8:27 AM CDT | Special Marine Warning | LIX | 63 min | |
| May 20, 8:37 AM CDT | Areal Flood Advisory | LIX | Ascension, Assumption, East Baton Rouge, Iberville, Lafourche, Livingston and 3 more | 52 min |
| May 20, 8:58 AM CDT | Tornado Warning | LIX | East Feliciana | 13 min |
| May 20, 9:29 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge | 9 hr |
| May 20, 9:45 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Saint Helena, West Feliciana | 11 hr |
| May 20, 10:04 AM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Livingston, Saint James and 1 more | 13 hr |
| May 20, 10:52 AM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 19 min |
| May 20, 11:22 AM CDT | Special Marine Warning | LIX | 38 min | |
| May 20, 11:26 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Livingston, Saint Helena | 94 min |
| May 20, 2:16 PM CDT | River Flood Warning | LIX | East Baton Rouge, Livingston | 68 hr |
| May 20, 2:22 PM CDT | River Flood Warning | LIX | Ascension, Livingston | 4 days |
| May 20, 2:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 2:40 PM CDT | River Flood Warning | LIX | East Baton Rouge | 61 hr |
| May 20, 3:29 PM CDT | Special Marine Warning | LIX | 61 min | |
| May 20, 3:56 PM CDT | Gale Warning | LIX | 19 hr | |
| May 20, 3:56 PM CDT | Small Craft Advisory | LIX | 60 hr | |
| May 20, 4:30 PM CDT | Special Marine Warning | LIX | 90 min | |
| May 20, 4:58 PM CDT | Special Weather Statement | LIX | Lafourche, Terrebonne | 47 min |
| May 20, 5:16 PM CDT | Areal Flood Advisory | LIX | Assumption, Jefferson, Lafourche, Terrebonne | 3 hr |
| May 20, 6:42 PM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, Saint Helena, West Baton Rouge | 4 hr |
Nearby
Wind Advisories in Louisiana, 2021Wind Advisories in Mississippi, 2021Every wind 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.