Alert archive / Louisiana / Special Marine Warnings in 2021

Special Marine Warning 9, NWS New Orleans, LA

January 7, 2021

NWS New Orleans, LA issued this special marine warning at Jan 7, 2021, 3:57 AM CST. It was in force for 63 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: Jan 7, 2021, 3:57 AM CST (09:57 UTC)
Expired: Jan 7, 2021, 5:00 AM CST
In force: 63 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 0.0 in
Wind: 40.0 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 Jan 7, 12:10 AM CST, 3 hours 47 minutes earlier.

Area forecast discussion, Jan 7, 12:10 AM CST, 3 hours 47 minutes before

Area Forecast Discussion
National Weather Service New Orleans LA
1210 AM CST Thu Jan 7 2021

.AVIATION...

.VALID 06Z 1/7 thru 12Z 1/8...

Between now and 14z, a band of showers will pass over the terminals.
The heaviest showers will occur with a frontal passage and will
bring gusty winds, IFR visibilities and MVFR ceilings to the
terminals for an hour or so. After the band of convection moves
through, winds will shift to the west and remain gusty at 15 to 20
knots through tomorrow afternoon. A 925mb thermal trough axis will
also keep a low stratus deck in place through Friday morning
resulting in prevailing IFR and MVFR ceilings. PG

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  55  37  48  30 /  10   0   0   0
BTR  54  40  49  32 /   0   0   0   0
ASD  60  40  52  32 /  10   0   0   0
MSY  58  42  51  37 /   0   0   0   0
GPT  62  40  53  32 /  50   0   0   0
PQL  63  41  53  30 /  90   0   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...Small Craft Advisory until 6 PM CST Friday for GMZ530-532-534-
     536-538-550-552-555-557-570-572-575-577.

MS...None.
GM...Small Craft Advisory until 6 PM CST Friday for GMZ532-534-536-
     538-550-552-555-557-570-572-575-577.

&&

In the hours before

Special weather statement, Jan 7, 1:30 AM CST, 2 hours 27 minutes before

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Special weather statement, Jan 7, 1:31 AM CST, 2 hours 26 minutes before

Special Weather Statement
National Weather Service New Orleans LA
131 AM CST Thu Jan 7 2021

LAZ067>070-070830-
Lower Plaquemines-Lower Jefferson-Lower St. Bernard-Lower Lafourche-
131 AM CST Thu Jan 7 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN ST.
BERNARD...SOUTHEASTERN LAFOURCHE...SOUTHEASTERN JEFFERSON AND
NORTHERN PLAQUEMINES PARISHES...

At 131 AM CST, radar indicated strong thunderstorms were located
along a line extending from 12 miles east of Golden Meadow to near
Port Fourchon. Movement was northeast at 55 mph.

Winds in excess of 40 mph are possible with these storms.

Locations impacted include...
Port Sulphur, Boothville-venice, Boothville, Pointe A La Hache,
Empire, Buras, Buras-triumph, Boothville Asos and Grand Isle.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 2947 9013 2989 8923 2965 8951 2965 8945
      2963 8947 2968 8967 2953 8967 2953 8966
      2952 8966 2940 8952 2940 8954 2941 8957
      2939 8956 2933 8927 2935 8920 2933 8920
      2911 9017
TIME...MOT...LOC 0731Z 244DEG 47KT 2944 9007 2910 9010

Local storm report, Jan 7, 2:08 AM CST, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
208 AM CST THU JAN 7 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0135 AM     TSTM WND GST     48 SSE LEEVILLE         28.65N 89.80W
01/07/2021  M44 MPH          GMZ572             LA   AWOS

            AWOS STATION KMDJ MISS CANYON 311A.

&&

Local storm report, Jan 7, 2:30 AM CST, 1 hour 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
230 AM CST THU JAN 7 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 AM     TSTM WND GST     48 SSE LEEVILLE         28.65N 89.80W
01/07/2021  M49 MPH          GMZ572             LA   AWOS

            AWOS STATION KMDJ MISS CANYON 311A.

&&

Local storm report, Jan 7, 2:41 AM CST, 1 hour 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
241 AM CST THU JAN 7 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 AM     TSTM WND GST     48 SSE LEEVILLE         28.64N 89.79W
01/07/2021  M49 MPH          GMZ572             LA   MESONET

            MESONET STATION KMDJ 48 SE LEEVILLE.

&&

Local storm report, Jan 7, 3:39 AM CST, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
339 AM CST THU JAN 7 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0242 AM     TSTM WND GST     24 S VENICE             28.93N 89.41W
01/07/2021  M40 MPH          GMZ552             LA   BUOY

            BUOY STATION PSTL1 PILOTS STATION EAST (SW
            PASS LA).

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 6, 11:11 PM CST	Special Weather Statement	LIX	East Baton Rouge, Iberville, West Baton Rouge	49 min
Jan 6, 11:32 PM CST	Special Weather Statement	LIX	Terrebonne	43 min
Jan 6, 11:58 PM CST	Special Marine Warning	LIX		62 min
Jan 7, 12:31 AM CST	Special Weather Statement	LIX	Lafourche, Terrebonne	59 min
Jan 7, 12:51 AM CST	Special Weather Statement	LIX	Orleans, Saint Charles	54 min
Jan 7, 12:57 AM CST	Tornado Warning	LIX	Saint Helena	18 min
Jan 7, 1:01 AM CST	Special Marine Warning	LIX		59 min
Jan 7, 1:30 AM CST	Special Weather Statement	LIX	Orleans	60 min
Jan 7, 1:31 AM CST	Special Weather Statement	LIX	Jefferson, Plaquemines	59 min
Jan 7, 1:33 AM CST	Special Marine Warning	LIX		57 min
Jan 7, 2:00 AM CST	Special Marine Warning	LIX		60 min
Jan 7, 2:05 AM CST	Special Marine Warning	LIX		55 min
Jan 7, 3:02 AM CST	Special Marine Warning	LIX		58 min
Jan 7, 3:04 AM CST	Special Marine Warning	LIX		56 min
Jan 7, 4:31 AM CST	Special Marine Warning	LIX		29 min
Jan 7, 4:56 AM CST	Special Marine Warning	LIX		34 min
Jan 7, 5:44 AM CST	Special Marine Warning	LIX		31 min
Jan 7, 4:07 AM CST	Special Weather Statement	LIX	Harrison, Jackson	38 min

Nearby

Special Marine Warnings in Louisiana, 2021 Every 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.