Alert archive / Louisiana / Wind Advisories in 2020

Wind Advisory 8, NWS New Orleans, LA

April 19, 20205 counties in Mississippi; 13 parishes in Louisiana

NWS New Orleans, LA issued this wind advisory at Apr 19, 2020, 4:13 AM CDT for 5 counties in Mississippi; 13 parishes in Louisiana. It took effect at Apr 19, 2020, 12:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Apr 19, 2020, 4:13 AM CDT (09:13 UTC)
In effect from: Apr 19, 2020, 12:00 PM CDT
Expired: Apr 19, 2020, 11:00 PM CDT
In force: 11 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, 9.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 514 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 570 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

559 
WWUS74 KLIX 190913
NPWLIX

URGENT - WEATHER MESSAGE
National Weather Service New Orleans LA
413 AM CDT Sun Apr 19 2020

LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-191715-
/O.NEW.KLIX.WI.Y.0008.200419T1700Z-200420T0400Z/
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, Picayune, Bay St. Louis, Waveland, Diamondhead, Gulfport,
Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin
413 AM CDT Sun Apr 19 2020

...WIND ADVISORY IN EFFECT FROM NOON TODAY TO 11 PM CDT THIS
EVENING...

* WHAT...Southwest winds 15 to 25 mph with gusts up to 35 mph 
  expected.

* WHERE...Portions of southern Mississippi and southeast 
  Louisiana.

* WHEN...From noon today to 11 PM CDT this evening.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

2 follow-up statements

343 
WWUS74 KLIX 191536
NPWLIX

URGENT - WEATHER MESSAGE
National Weather Service New Orleans LA
1036 AM CDT Sun Apr 19 2020

LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-192345-
/O.CON.KLIX.WI.Y.0008.200419T1700Z-200420T0400Z/
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, Picayune, Bay St. Louis, Waveland, Diamondhead, Gulfport,
Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin
1036 AM CDT Sun Apr 19 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 PM CDT THIS EVENING...

* WHAT...Southwest winds 15 to 25 mph with gusts up to 35 mph 
  expected.

* WHERE...Portions of southern Mississippi and southeast 
  Louisiana.

* WHEN...From noon today to 11 PM CDT this evening.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

24/RR

933 
WWUS74 KLIX 192111
NPWLIX

URGENT - WEATHER MESSAGE
National Weather Service New Orleans LA
411 PM CDT Sun Apr 19 2020

LAZ034>037-039-040-046>050-056>072-MSZ068>071-077-080>082-200400-
/O.CON.KLIX.WI.Y.0008.000000T0000Z-200420T0400Z/
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, Picayune, Bay St. Louis, Waveland, Diamondhead, Gulfport,
Pascagoula, Ocean Springs, Moss Point, Gautier, and St. Martin
411 PM CDT Sun Apr 19 2020

...WIND ADVISORY REMAINS IN EFFECT UNTIL 11 PM CDT THIS EVENING...

* WHAT...Southwest winds 15 to 25 mph with gusts up to 35 mph 
  expected.

* WHERE...Portions of southern Mississippi and southeast 
  Louisiana.

* WHEN...From noon today to 11 PM CDT this evening.


* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

What forecasters said that day

The local office's own words before this wind 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 advisory went out at Apr 19, 12:14 AM CDT, 3 hours 59 minutes earlier.

Area forecast discussion, Apr 19, 12:14 AM CDT, 3 hours 59 minutes before

Area Forecast Discussion
National Weather Service New Orleans LA
1214 AM CDT Sun Apr 19 2020

.AVIATION...Main concern will be low clouds that envelop the area
through the morning. Overall most terminals will drop to IFR
status with BKN or OVC around 800 but a few sites may fall to
LIFR around 300 ft. Some reductions in vsbys are possible however
not anticipating many terminals dropping below 3sm. Conditions
should begin to improve a few hours after sunrise and then the
wait for convection tomorrow afternoon and evening. /CAB/

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  65  78  56  81 /  80   0   0   0
BTR  65  78  57  83 /  50   0   0   0
ASD  66  81  58  83 /  70   0   0   0
MSY  69  81  64  81 /  50   0   0   0
GPT  67  80  60  79 /  80   0   0   0
PQL  66  83  58  83 /  70   0   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...None.
MS...None.
GM...None.
&&

In the hours before

Special weather statement, Apr 18, 10:28 PM CDT, 5 hours 45 minutes before

Special Weather Statement
National Weather Service New Orleans LA
1028 PM CDT Sat Apr 18 2020

LAZ056>058-190430-
Assumption-St. John The Baptist-St. James-
1028 PM CDT Sat Apr 18 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN ST. JOHN THE
BAPTIST...ST. JAMES AND NORTHEASTERN ASSUMPTION PARISHES...

At 1028 PM CDT, a strong thunderstorm was located near Napoleonville,
moving east at 40 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Reserve, Gramercy, Lutcher, Wallace, Edgard, South Vacherie, Convent,
North Vacherie, Garyville and Chackbay.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 3001 9101 3013 9055 2990 9054 2990 9072
      2991 9073 2992 9078 2991 9079 2990 9100
TIME...MOT...LOC 0328Z 264DEG 33KT 2995 9096

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 7:48 PM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	57 min
Apr 19, 5:07 PM CDT	Special Weather Statement	LIX	Wilkinson	38 min
Apr 19, 5:11 PM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	49 min
Apr 19, 5:35 PM CDT	Severe Thunderstorm Warning	LIX	Amite	70 min
Apr 19, 5:41 PM CDT	Severe Thunderstorm Warning	LIX	Amite	49 min
Apr 19, 6:01 PM CDT	Tornado Warning	LIX	Amite, Pike	59 min
Apr 19, 6:39 PM CDT	Tornado Warning	LIX	Pike, Walthall	38 min
Apr 18, 7:10 PM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	50 min
Apr 18, 7:46 PM CDT	Special Weather Statement	LIX	West Feliciana	59 min
Apr 18, 7:50 PM CDT	Special Weather Statement	LIX	Saint Helena	55 min
Apr 18, 8:33 PM CDT	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint James, Saint John the Baptist	57 min
Apr 18, 9:29 PM CDT	Special Weather Statement	LIX	Orleans	61 min
Apr 18, 9:32 PM CDT	Special Weather Statement	LIX	Saint Charles	13 min
Apr 18, 9:35 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Saint Bernard, Saint Charles	26 min
Apr 18, 9:56 PM CDT	Special Weather Statement	LIX	Assumption	49 min
Apr 18, 10:28 PM CDT	Special Weather Statement	LIX	Saint James	62 min
Apr 19, 4:30 AM CDT	Small Craft Advisory	LIX		7 hr
Apr 19, 10:51 AM CDT	Special Marine Warning	LIX		31 min
Apr 19, 11:08 AM CDT	Small Craft Advisory	LIX		19 hr
Apr 19, 11:08 AM CDT	Storm Warning	LIX		3 hr
Apr 19, 2:10 PM CDT	Special Marine Warning	LIX		95 min
Apr 19, 4:49 PM CDT	Special Weather Statement	LIX	Pointe Coupee, West Feliciana	56 min
Apr 19, 4:54 PM CDT	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	50 min

Nearby

Wind Advisories in Louisiana, 2020 Wind Advisories in Mississippi, 2020 Every wind advisory in 2020

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.