Alert archive / Louisiana / Special Weather Statements in 2021
Special Weather Statement, NWS New Orleans, LA
NWS New Orleans, LA issued this special weather statement at Apr 14, 2021, 1:32 PM CDT for Jefferson Parish, Louisiana. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 14, 2021, 1:32 PM CDT (18:32 UTC)
- Expired
- Apr 14, 2021, 2:00 PM CDT
- In force
- 28 min
- Issued by
- NWS New Orleans, LA
County Jefferson Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.5 hours before the alert went out and 110 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
- 1255 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
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The local office's own words before this special weather statement 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 special weather statement went out at Apr 14, 1:25 PM CDT, 7 minutes earlier.
Area forecast discussion, Apr 14, 1:25 PM CDT, 7 minutes before
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Special weather statement, Apr 14, 11:21 AM CDT, 2 hours 11 minutes before
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</html>Special weather statement, Apr 14, 11:58 AM CDT, 1 hour 34 minutes before
Special Weather Statement
National Weather Service New Orleans LA
1158 AM CDT Wed Apr 14 2021
LAZ069-141730-
Lower Plaquemines-
1158 AM CDT Wed Apr 14 2021
...A STRONG THUNDERSTORM WILL AFFECT WEST CENTRAL PLAQUEMINES
PARISH...
At 1157 AM CDT, a strong thunderstorm was located 9 miles southwest
of Port Sulphur, moving northeast at 35 mph.
Winds in excess of 30 mph are possible with this storm.
Locations impacted include...
Port Sulphur and Empire.
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 2931 8987 2935 8983 2939 8986 2937 8979
2941 8978 2941 8987 2945 8982 2948 8984
2942 8993 2946 8996 2945 8990 2958 8971
2950 8964 2946 8952 2942 8952 2934 8974
2938 8972 2938 8977 2934 8975 2931 8986
TIME...MOT...LOC 1657Z 236DEG 33KT 2943 8985
MSWSpecial weather statement, Apr 14, 12:32 PM CDT, 1 hour before
Special Weather Statement
National Weather Service New Orleans LA
1232 PM CDT Wed Apr 14 2021
LAZ059>061-063-065>067-141800-
Lower Terrebonne-St. Charles-Upper Terrebonne-Lower Lafourche-Upper
Plaquemines-Upper Lafourche-Upper Jefferson-
1232 PM CDT Wed Apr 14 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHERN ST. CHARLES...
CENTRAL TERREBONNE...NORTHEASTERN LAFOURCHE AND NORTHWESTERN
JEFFERSON PARISHES...
At 1231 PM CDT, radar indicated strong thunderstorms were located
along a line extending from Waggaman to 19 miles west of Dulac.
Movement was east at 45 mph.
Winds in excess of 30 mph are possible with these storms.
Locations impacted include...
Houma, Cut Off, Larose, Belle Chasse, Marrero, Avondale, Harvey,
Hahnville, Westwego, Lockport, Jean Lafitte, Mathews, Chauvin, Dulac,
Luling, Boutte, Raceland, Estelle, Montegut and Bayou Cane.
Torrential rainfall is also occurring with these storms, 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 2930 9093 2933 9093 2934 9096 2933 9100
2930 9099 2931 9112 2934 9113 2994 9040
2985 9001 2933 9047 2933 9049 2936 9052
2931 9052 2932 9050 2928 9055
TIME...MOT...LOC 1731Z 275DEG 38KT 2992 9023 2931 9102
MSWSpecial weather statement, Apr 14, 1:02 PM CDT, 30 minutes before
Special Weather Statement
National Weather Service New Orleans LA
102 PM CDT Wed Apr 14 2021
LAZ059-061-063-066>070-141830-
Lower Terrebonne-Lower Plaquemines-Lower Jefferson-Lower St.
Bernard-Lower Lafourche-Upper Plaquemines-Upper Lafourche-Upper
Jefferson-
102 PM CDT Wed Apr 14 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTH CENTRAL ST.
BERNARD...SOUTHEASTERN TERREBONNE...SOUTHEASTERN LAFOURCHE...CENTRAL
JEFFERSON AND NORTHWESTERN PLAQUEMINES PARISHES...
At 101 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Jean Lafitte to near Cocodrie.
Movement was east at 40 mph.
Winds in excess of 40 mph are possible with these storms.
Locations impacted include...
Cut Off, Galliano, Larose, Belle Chasse, Port Sulphur, Golden Meadow,
Jean Lafitte, Lafitte, Port Fourchon, Myrtle Grove, Pointe A La
Hache, Barataria, Leeville, Cocodrie, Dulac, Tambour Bay Buoy, Grand
Isle and Lumcon Center Buoy.
Torrential rainfall is also occurring with these storms, 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 2934 9035 2934 9036 2922 9040 2935 9043
2913 9065 2916 9086 2986 9003 2970 8959
2942 8981 2948 8984 2942 8994 2949 8989
2944 9002 2936 9004 2935 8998 2926 8995
2910 9019
TIME...MOT...LOC 1801Z 268DEG 37KT 2979 9007 2922 9073
MSWSpecial weather statement, Apr 14, 1:32 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service New Orleans LA
132 PM CDT Wed Apr 14 2021
LAZ059-061-066>069-141900-
Lower Terrebonne-Lower Plaquemines-Lower Jefferson-Lower
Lafourche-Upper Lafourche-Upper Jefferson-
132 PM CDT Wed Apr 14 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT EAST CENTRAL
TERREBONNE...SOUTHEASTERN LAFOURCHE...CENTRAL JEFFERSON AND WEST
CENTRAL PLAQUEMINES PARISHES...
At 131 PM CDT, radar indicated strong thunderstorms were located
along a line extending from 9 miles south of Lafitte to 15 miles
southeast of Cocodrie. Movement was east at 35 mph.
Winds in excess of 30 mph are possible with these storms.
Locations impacted include...
Cut Off, Port Sulphur, Galliano, Golden Meadow, Myrtle Grove, Pointe
A La Hache, Leeville, Lafitte and Grand Isle.
Torrential rainfall is also occurring with these storms, 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 2916 9028 2915 9027 2920 9026 2928 9035
2934 9035 2922 9040 2932 9042 2928 9049
2969 9025 2960 8973 2955 8968 2940 8979
2940 8978 2939 8982 2931 8984 2935 8984
2930 8990 2935 8998 2926 8995 2909 9022
TIME...MOT...LOC 1831Z 283DEG 31KT 2956 9016 2909 9049
MSWThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:36 PM CDT | Special Weather Statement | LIX | Assumption | 24 min |
| Apr 13, 7:37 PM CDT | Special Weather Statement | LIX | Terrebonne | 23 min |
| Apr 13, 9:31 PM CDT | River Flood Warning | LIX | Saint Tammany | 4 days |
| Apr 13, 9:31 PM CDT | River Flood Warning | LIX | Saint Tammany | 5 days |
| Apr 14, 7:29 AM CDT | Special Weather Statement | LIX | Pointe Coupee, West Feliciana | 46 min |
| Apr 14, 7:34 AM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 41 min |
| Apr 14, 8:12 AM CDT | Special Weather Statement | LIX | East Feliciana | 48 min |
| Apr 14, 8:18 AM CDT | Special Weather Statement | LIX | Pointe Coupee, West Feliciana | 27 min |
| Apr 14, 8:24 AM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, West Feliciana | 12 min |
| Apr 14, 8:49 AM CDT | Special Weather Statement | LIX | East Baton Rouge, West Baton Rouge | 56 min |
| Apr 14, 9:04 AM CDT | Special Weather Statement | LIX | East Feliciana, Saint Helena | 41 min |
| Apr 14, 9:09 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, Iberville, Livingston, West Baton Rouge | 36 min |
| Apr 14, 9:12 AM CDT | Special Weather Statement | LIX | Terrebonne | 33 min |
| Apr 14, 9:34 AM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Livingston, Saint Helena, West Baton Rouge | 116 min |
| Apr 14, 9:36 AM CDT | Special Weather Statement | LIX | Livingston | 24 min |
| Apr 14, 9:41 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Livingston, Saint James | 34 min |
| Apr 14, 10:01 AM CDT | Special Weather Statement | LIX | Washington | 29 min |
| Apr 14, 10:11 AM CDT | Special Weather Statement | LIX | Jefferson, Lafourche | 34 min |
| Apr 14, 10:15 AM CDT | Special Weather Statement | LIX | Saint Tammany | 30 min |
| Apr 14, 10:16 AM CDT | Special Weather Statement | LIX | Saint James, Saint John the Baptist | 29 min |
| Apr 14, 10:20 AM CDT | Special Weather Statement | LIX | Assumption | 25 min |
| Apr 14, 10:24 AM CDT | River Flood Warning | LIX | Saint Tammany | 3 days |
| Apr 14, 10:28 AM CDT | Special Weather Statement | LIX | East Feliciana, West Feliciana | 32 min |
| Apr 14, 10:30 AM CDT | Special Weather Statement | LIX | Saint Tammany | 30 min |
| Apr 14, 10:47 AM CDT | Special Weather Statement | LIX | Jefferson | 28 min |
| Apr 14, 11:03 AM CDT | Special Marine Warning | LIX | 57 min | |
| Apr 14, 11:05 AM CDT | Special Weather Statement | LIX | Livingston, Saint Helena, Tangipahoa | 25 min |
| Apr 14, 11:07 AM CDT | Special Marine Warning | LIX | 53 min | |
| Apr 14, 11:21 AM CDT | Special Weather Statement | LIX | Lafourche | 24 min |
| Apr 14, 11:28 AM CDT | Special Weather Statement | LIX | Tangipahoa, Washington | 32 min |
| Apr 14, 11:51 AM CDT | Special Marine Warning | LIX | 54 min | |
| Apr 14, 11:58 AM CDT | Special Weather Statement | LIX | Plaquemines | 32 min |
| Apr 14, 12:32 PM CDT | Special Weather Statement | LIX | Lafourche, Saint Charles, Terrebonne | 28 min |
| Apr 14, 1:02 PM CDT | Special Weather Statement | LIX | Jefferson, Lafourche | 28 min |
| Apr 14, 1:11 PM CDT | Special Marine Warning | LIX | 64 min | |
| Apr 14, 2:08 PM CDT | Special Marine Warning | LIX | 67 min | |
| Apr 14, 2:55 PM CDT | Special Marine Warning | LIX | 65 min | |
| Apr 14, 3:45 PM CDT | Special Weather Statement | LIX | Livingston, Tangipahoa | 30 min |
| Apr 14, 4:12 PM CDT | Special Weather Statement | LIX | Saint Tammany | 33 min |
| Apr 14, 4:24 PM CDT | Special Marine Warning | LIX | 96 min | |
| Apr 14, 5:03 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 3 hr |
| Apr 14, 5:26 PM CDT | Special Marine Warning | LIX | 105 min | |
| Apr 14, 5:27 PM CDT | Special Weather Statement | LIX | Saint Charles | 33 min |
| Apr 14, 6:21 PM CDT | Special Marine Warning | LIX | 114 min | |
| Apr 14, 6:24 PM CDT | Special Weather Statement | LIX | Jefferson | 96 min |
| Apr 14, 6:39 PM CDT | Special Marine Warning | LIX | 2 hr | |
| Apr 14, 6:57 PM CDT | Special Marine Warning | LIX | 2 hr | |
| Apr 14, 7:17 AM CDT | Special Weather Statement | LIX | Wilkinson | 58 min |
| Apr 14, 10:00 AM CDT | River Flood Warning | LIX | Jackson | 8 days |
| Apr 14, 10:00 AM CDT | River Flood Warning | LIX | Harrison | 5 days |
| Apr 14, 10:00 AM CDT | River Flood Warning | LIX | Harrison | 5 days |
| Apr 14, 10:17 AM CDT | Special Weather Statement | LIX | Jackson | 28 min |
Nearby
Special Weather Statements in Louisiana, 2021Every special weather statement 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.