Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 137
NWS Storm Prediction Center Norman OK
945 PM CDT Wed Apr 22 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Eastern Louisiana
Southern Mississippi
* Effective this Wednesday night and Thursday morning from 945 PM
until 500 AM CDT.
* Primary threats include...
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...A long-tracked supercell with a history of tornadoes will
continue east from central Louisiana, while additional supercells
upstream will likely grow upscale into a broadening cluster
overnight.
The tornado watch area is approximately along and 70 statute miles
north and south of a line from 30 miles west of Natchez MS to 65
miles north northeast of Slidell LA. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU7).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 135...WW 136...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 25030.
...Grams
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 137
NWS Storm Prediction Center Norman OK
945 PM CDT Wed Apr 22 2020
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Eastern Louisiana
Southern Mississippi
* Effective this Wednesday night and Thursday morning from 945 PM
until 500 AM CDT.
* Primary threats include...
A few tornadoes likely with a couple intense tornadoes possible
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...A long-tracked supercell with a history of tornadoes will
continue east from central Louisiana, while additional supercells
upstream will likely grow upscale into a broadening cluster
overnight.
The tornado watch area is approximately along and 70 statute miles
north and south of a line from 30 miles west of Natchez MS to 65
miles north northeast of Slidell LA. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU7).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 135...WW 136...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 2 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 25030.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 137 TORNADO LA MS 230245Z - 231000Z
AXIS..70 STATUTE MILES NORTH AND SOUTH OF LINE..
30W HEZ/NATCHEZ MS/ - 65NNE ASD/SLIDELL LA/
..AVIATION COORDS.. 60NM N/S /41ENE AEX - 44E MCB/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 25030.
LAT...LON 32639181 32238940 30218940 30619181
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 137 Status Report Messages:
STATUS REPORT #4 ON WW 137
VALID 230930Z - 231040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 WNW MSY
TO 35 WSW PIB TO 25 NNW PIB TO 5 SSW MEI.
..LEITMAN..04/23/20
ATTN...WFO...JAN...LIX...
&&
STATUS REPORT FOR WT 137
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC005-063-103-105-117-231040-
LA
. LOUISIANA PARISHES INCLUDED ARE
ASCENSION LIVINGSTON ST. TAMMANY
TANGIPAHOA WASHINGTON
$$
MSC023-031-035-061-067-073-091-231040-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
CLARKE COVINGTON FORREST
JASPER JONES LAMAR
MARION
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 137
VALID 230845Z - 230940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNE LFT
TO 30 N MCB TO 35 W MEI.
..LEITMAN..04/23/20
ATTN...WFO...JAN...LIX...
&&
STATUS REPORT FOR WT 137
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC005-033-037-047-063-077-091-103-105-117-121-125-230940-
LA
. LOUISIANA PARISHES INCLUDED ARE
ASCENSION EAST BATON ROUGE EAST FELICIANA
IBERVILLE LIVINGSTON POINTE COUPEE
ST. HELENA ST. TAMMANY TANGIPAHOA
WASHINGTON WEST BATON ROUGE WEST FELICIANA
$$
MSC005-023-031-035-045-061-065-067-073-077-085-091-109-113-127-
129-147-230940-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
AMITE CLARKE COVINGTON
FORREST HANCOCK JASPER
JEFFERSON DAVIS JONES LAMAR
LAWRENCE LINCOLN MARION
PEARL RIVER PIKE SIMPSON
SMITH WALTHALL
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 137
VALID 230750Z - 230840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SE ESF TO
10 SSE HEZ TO 55 NE HEZ TO 70 S GWO.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 455.
..LEITMAN..04/23/20
ATTN...WFO...JAN...LIX...
&&
STATUS REPORT FOR WT 137
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC005-033-037-047-063-077-091-103-105-117-121-125-230840-
LA
. LOUISIANA PARISHES INCLUDED ARE
ASCENSION EAST BATON ROUGE EAST FELICIANA
IBERVILLE LIVINGSTON POINTE COUPEE
ST. HELENA ST. TAMMANY TANGIPAHOA
WASHINGTON WEST BATON ROUGE WEST FELICIANA
$$
MSC001-005-021-029-031-035-037-045-049-063-065-067-073-077-085-
091-109-113-121-127-129-147-157-230840-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
ADAMS AMITE CLAIBORNE
COPIAH COVINGTON FORREST
FRANKLIN HANCOCK HINDS
JEFFERSON JEFFERSON DAVIS JONES
LAMAR LAWRENCE LINCOLN
MARION PEARL RIVER PIKE
RANKIN SIMPSON SMITH
WALTHALL WILKINSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 137
VALID 230620Z - 230740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW HEZ
TO 60 S GLH.
..LEITMAN..04/23/20
ATTN...WFO...JAN...LIX...
&&
STATUS REPORT FOR WT 137
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC025-029-033-037-063-077-091-103-105-107-117-121-125-230740-
LA
. LOUISIANA PARISHES INCLUDED ARE
CATAHOULA CONCORDIA EAST BATON ROUGE
EAST FELICIANA LIVINGSTON POINTE COUPEE
ST. HELENA ST. TAMMANY TANGIPAHOA
TENSAS WASHINGTON WEST BATON ROUGE
WEST FELICIANA
$$
MSC001-005-021-029-031-035-037-045-049-063-065-067-073-077-085-
091-109-113-121-127-129-147-149-157-230740-
MS
. MISSISSIPPI COUNTIES INCLUDED ARE
ADAMS AMITE CLAIBORNE
COPIAH COVINGTON FORREST
FRANKLIN HANCOCK HINDS
JEFFERSON JEFFERSON DAVIS JONES
LAMAR LAWRENCE LINCOLN
MARION PEARL RIVER PIKE
RANKIN SIMPSON SMITH
WALTHALL WARREN WILKINSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
High (70%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Mod (50%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (90%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
