Alert archive / Louisiana / Special Marine Warnings in 2021
Special Marine Warning 451, NWS New Orleans, LA
NWS New Orleans, LA issued this special marine warning at Aug 3, 2021, 10:24 AM CDT. It was in force for 96 min. 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 3, 2021, 10:24 AM CDT (15:24 UTC)
- Expired
- Aug 3, 2021, 12:00 PM CDT
- In force
- 96 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
What forecasters said that day
The local office's own words before this special marine 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 special marine warning went out at Aug 3, 6:17 AM CDT, 4 hours 7 minutes earlier.
Area forecast discussion, Aug 3, 6:17 AM CDT, 4 hours 7 minutes before
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Special weather statement, Aug 3, 6:33 AM CDT, 3 hours 51 minutes before
Special Weather Statement
National Weather Service New Orleans LA
633 AM CDT Tue Aug 3 2021
LAZ069-031200-
Lower Plaquemines-
633 AM CDT Tue Aug 3 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN PLAQUEMINES
PARISH...
At 633 AM CDT, a strong thunderstorm was located over Venice, or 26
miles southeast of Port Sulphur, moving east at 20 mph.
Winds in excess of 40 mph are possible with this storm.
Locations impacted include...
Boothville-venice, Boothville, Venice, Buras-triumph and Boothville
Asos.
LAT...LON 2919 8934 2916 8937 2917 8944 2935 8945
2936 8938 2933 8937 2936 8937 2935 8930
2931 8924 2935 8920 2929 8914 2930 8918
2927 8921 2925 8912 2918 8910 2920 8914
2919 8914 2917 8910 2914 8911 2914 8925
TIME...MOT...LOC 1133Z 268DEG 16KT 2927 8937Special weather statement, Aug 3, 6:44 AM CDT, 3 hours 40 minutes before
Special Weather Statement
National Weather Service New Orleans LA
644 AM CDT Tue Aug 3 2021
LAZ046-049-056>059-065>067-031245-
Lower Terrebonne-Iberville-Ascension-Upper Terrebonne-Lower
Lafourche-Assumption-St. John The Baptist-St. James-Upper Lafourche-
644 AM CDT Tue Aug 3 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHWESTERN ST. JOHN
THE BAPTIST...WESTERN ASCENSION...ST. JAMES...NORTHEASTERN
TERREBONNE...SOUTHEASTERN IBERVILLE...NORTHWESTERN LAFOURCHE AND
NORTHEASTERN ASSUMPTION PARISHES...
At 644 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Belle Rose to near Chauvin. Movement
was northeast at 10 mph.
Winds in excess of 30 mph are possible with these storms.
Locations impacted include...
Houma, Thibodaux, Gonzales, Donaldsonville, Napoleonville, Galliano,
Larose, Cut Off, Lockport, Golden Meadow, White Castle, Sorrento,
Mathews, Schriever, Chauvin, Geismar, Supreme, Raceland, Chackbay and
Montegut.
This includes Interstate 10 in Louisiana between mile markers 174 and
187.
LAT...LON 2931 9063 3011 9121 3031 9091 2939 9024
2934 9046 2934 9049 2935 9051 2936 9050
2936 9052 2933 9052
TIME...MOT...LOC 1144Z 244DEG 11KT 3008 9110 2940 9060Special weather statement, Aug 3, 7:47 AM CDT, 2 hours 37 minutes before
Special Weather Statement
National Weather Service New Orleans LA
747 AM CDT Tue Aug 3 2021
LAZ048>050-057>061-063-064-067>070-072-077-031415-
St. Charles-Livingston-Ascension-Lower Jefferson-Southern
Tangipahoa-Lower St. Bernard-St. James-East Baton Rouge-Lower
Plaquemines-Western Orleans-Upper St. Bernard-Lower Lafourche-St.
John The Baptist-Upper Plaquemines-Upper Lafourche-Upper Jefferson-
747 AM CDT Tue Aug 3 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT ST. JOHN THE BAPTIST...
CENTRAL ASCENSION...NORTHEASTERN ST. JAMES...SOUTHWESTERN ST.
BERNARD...ST. CHARLES...SOUTHWESTERN ORLEANS...SOUTHERN LIVINGSTON...
NORTHEASTERN LAFOURCHE...JEFFERSON...SOUTHERN TANGIPAHOA...
NORTHWESTERN PLAQUEMINES AND SOUTH CENTRAL EAST BATON ROUGE
PARISHES...
At 746 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Prairieville to 7 miles northeast of
Cut Off. Movement was east at 20 mph.
Winds in excess of 30 mph are possible with these storms.
Locations impacted include...
New Orleans, Hammond, Gonzales, Reserve, Metairie, Hahnville,
Laplace, Marrero, Chalmette, Avondale, Harvey, Timberlane, Belle
Chasse, Port Sulphur, Jefferson, Gretna, Harahan, Westwego,
Ponchatoula and Gramercy.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 166 and 170, and
between mile markers 184 and 245.
Interstate 12 between mile markers 36 and 45.
Interstate 55 in Louisiana between mile markers 1 and 30.
Interstate 310 between mile markers 1 and 11.
Interstate 610 between mile markers 1 and 4.
LAT...LON 3037 9105 3051 9039 3036 9025 3019 9043
3009 9041 3006 9037 3002 9018 3005 8997
2966 8961 2968 8964 2968 8966 2964 8966
2961 8963 2963 8968 2961 8973 2953 8966
2951 8967 2949 8998 2952 9000 2949 9024
TIME...MOT...LOC 1246Z 262DEG 17KT 3032 9092 2956 9021Local storm report, Aug 3, 9:57 AM CDT, 27 minutes before
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 4:23 AM CDT | Special Marine Warning | LIX | 67 min | |
| Aug 3, 6:33 AM CDT | Special Weather Statement | LIX | Plaquemines | 27 min |
| Aug 3, 6:44 AM CDT | Special Weather Statement | LIX | Ascension, Lafourche, Saint James | 61 min |
| Aug 3, 7:47 AM CDT | Special Weather Statement | LIX | Saint Charles, Saint John the Baptist | 88 min |
| Aug 3, 8:42 AM CDT | Special Marine Warning | LIX | 63 min | |
| Aug 3, 8:50 AM CDT | Areal Flood Advisory | LIX | Orleans, Saint Bernard | 19 min |
| Aug 3, 9:09 AM CDT | Flash Flood Warning | LIX | Orleans | 2 hr |
| Aug 3, 10:04 AM CDT | Special Marine Warning | LIX | 86 min | |
| Aug 3, 10:40 AM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Livingston | 90 min |
| Aug 3, 10:53 AM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Livingston | 77 min |
| Aug 3, 11:04 AM CDT | Special Marine Warning | LIX | 116 min | |
| Aug 3, 11:40 AM CDT | Special Marine Warning | LIX | 110 min | |
| Aug 3, 11:49 AM CDT | Special Marine Warning | LIX | 86 min | |
| Aug 3, 11:52 AM CDT | Special Marine Warning | LIX | 113 min | |
| Aug 3, 2:45 PM CDT | Flash Flood Warning | LIX | East Baton Rouge, Livingston | 4 hr |
| Aug 3, 3:00 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Saint Charles, Saint John the Baptist | 3 hr |
| Aug 3, 3:28 PM CDT | Flash Flood Warning | LIX | Saint Charles, Saint John the Baptist | 2 hr |
| Aug 3, 3:39 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 119 min |
| Aug 3, 3:52 PM CDT | Areal Flood Advisory | LIX | Ascension, Saint Charles, Saint James, Saint John the Baptist | 103 min |
| Aug 3, 4:39 PM CDT | Areal Flood Advisory | LIX | Saint Charles, Saint James, Saint John the Baptist | 50 min |
| Aug 3, 4:53 PM CDT | Flash Flood Warning | LIX | Saint James, Saint John the Baptist | 39 min |
| Aug 3, 5:27 PM CDT | Areal Flood Advisory | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Aug 3, 5:33 PM CDT | Areal Flood Advisory | LIX | Saint Tammany | 117 min |
| Aug 3, 6:33 PM CDT | Areal Flood Advisory | LIX | Hancock, Harrison | 117 min |
Nearby
Special Marine Warnings in Louisiana, 2021Every special marine warning 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.