Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL8
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 898
NWS STORM PREDICTION CENTER NORMAN OK
1245 PM CDT FRI SEP 12 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN LOUISIANA
A SMALL PART OF SOUTHWESTERN MISSISSIPPI
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL
1000 PM CDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF LAKE
CHARLES LOUISIANA TO 25 MILES SOUTH SOUTHEAST OF SLIDELL
LOUISIANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 897. WATCH NUMBER 897 WILL NOT BE IN EFFECT AFTER
1245 PM CDT.
DISCUSSION...SHALLOW MOIST CONVECTION REVOLVING AROUND HURRICANE IKE
WILL CONTINUE ACROSS WW THROUGH THIS EVENING. LOW LEVEL SHEAR WILL
REMAIN QUITE STRONG AND MAINTAIN THREAT OF ROTATION/ISOLATED
TORNADOES...WITH THREAT SPREADING SLOWLY WWD INTO MORE OF SWRN LA
THIS EVENING.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 350. MEAN STORM MOTION VECTOR 11040.
...EVANS
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW8
WW 898 TORNADO LA MS CW 121745Z - 130300Z
AXIS..70 STATUTE MILES NORTH AND SOUTH OF LINE..
35NW LCH/LAKE CHARLES LA/ - 25SSE ASD/SLIDELL LA/
..AVIATION COORDS.. 60NM N/S /34NW LCH - 32E MSY/
WIND GUSTS..60 KNOTS.
MAX TOPS TO 350.MEAN STORM MOTION VECTOR 11040.
REPLACES WW 897..LA MS CW
LAT...LON 31509363 31038966 29008966 29469363
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 898 Status Report Messages:
STATUS REPORT #3 ON WW 898
VALID 130040Z - 130100Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 ESE ESF
TO 40 SSE HUM.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 2254.
..CROSBIE..09/13/08
ATTN...WFO...LCH...LIX...
&&
STATUS REPORT FOR WT 898
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC001-003-007-009-011-019-023-039-045-047-053-055-075-077-079-
097-099-101-109-113-115-130140-
LA
. LOUISIANA PARISHES INCLUDED ARE
ACADIA ALLEN ASSUMPTION
AVOYELLES BEAUREGARD CALCASIEU
CAMERON EVANGELINE IBERIA
IBERVILLE JEFFERSON DAVIS LAFAYETTE
PLAQUEMINES POINTE COUPEE RAPIDES
ST. LANDRY ST. MARTIN ST. MARY
TERREBONNE VERMILION VERNON
$$
GMZ450-452-455-130140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM
$$
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.
$$
STATUS REPORT #2 ON WW 898
VALID 122145Z - 122240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..CROSBIE..09/12/08
ATTN...WFO...LCH...LIX...
&&
STATUS REPORT FOR WT 898
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC001-003-007-009-011-019-023-039-045-047-053-055-075-077-079-
097-099-101-109-113-115-122240-
LA
. LOUISIANA PARISHES INCLUDED ARE
ACADIA ALLEN ASSUMPTION
AVOYELLES BEAUREGARD CALCASIEU
CAMERON EVANGELINE IBERIA
IBERVILLE JEFFERSON DAVIS LAFAYETTE
PLAQUEMINES POINTE COUPEE RAPIDES
ST. LANDRY ST. MARTIN ST. MARY
TERREBONNE VERMILION VERNON
$$
GMZ450-452-455-122240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 898
VALID 122105Z - 122240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ESE ESF
TO 35 SSE HUM.
..CROSBIE..09/12/08
ATTN...WFO...LCH...LIX...
&&
STATUS REPORT FOR WT 898
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC001-003-007-009-011-019-023-039-045-047-053-055-075-077-079-
097-099-101-109-113-115-122240-
LA
. LOUISIANA PARISHES INCLUDED ARE
ACADIA ALLEN ASSUMPTION
AVOYELLES BEAUREGARD CALCASIEU
CAMERON EVANGELINE IBERIA
IBERVILLE JEFFERSON DAVIS LAFAYETTE
PLAQUEMINES POINTE COUPEE RAPIDES
ST. LANDRY ST. MARTIN ST. MARY
TERREBONNE VERMILION VERNON
$$
GMZ450-452-455-122240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM
$$
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
|
Mod (40%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Low (10%)
|
Probability of 1 or more wind events > 65 knots
|
Low (<5%)
|
Hail
Probability of 10 or more severe hail events
|
Low (<5%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Low (20%)
|
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% (F2-F5 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 
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