Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL3
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 753
NWS STORM PREDICTION CENTER NORMAN OK
630 PM CDT THU OCT 1 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
CENTRAL AND SOUTHWEST ARKANSAS
NORTHWEST LOUISIANA
NORTHEAST TEXAS
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 630 PM
UNTIL 200 AM CDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH
NORTHEAST OF HOT SPRINGS ARKANSAS TO 60 MILES SOUTH OF LONGVIEW
TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 751...WW 752...
DISCUSSION...A BROKEN BAND OF STRONG/SEVERE STORMS ALONG THE COLD
FRONT WILL CONTINUE TO MOVE EWD/SEWD THROUGH EARLY TONIGHT ACROSS SW
AR/NE TX/NW LA...WHILE OTHER MORE ISOLATED STORMS FORM IN THE WARM
SECTOR ACROSS SW AR IN A ZONE OF WEAK BACKGROUND ASCENT. THE
COMBINATION OF MODERATE INSTABILITY AND SUFFICIENT DEEP LAYER
VERTICAL SHEAR FOR SUPERCELLS WILL CONTINUE TO SUPPORT ORGANIZED
SEVERE STORMS CAPABLE OF PRODUCING DAMAGING WINDS AND LARGE HAIL.
AN ISOLATED TORNADO CANNOT BE COMPLETELY RULED OUT CLOSER TO THE
WARM FRONT IN AR...THOUGH GRADUAL WEAKENING OF LOW-LEVEL SHEAR AND
INSTABILITY TONIGHT SUGGESTS THAT ANY TORNADO THREAT WILL BE
LIMITED.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29030.
...THOMPSON
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW3
WW 753 SEVERE TSTM AR LA TX 012330Z - 020700Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
40NNE HOT/HOT SPRINGS AR/ - 60S GGG/LONGVIEW TX/
..AVIATION COORDS.. 50NM E/W /37WNW LIT - 21N LFK/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 29030.
LAT...LON 35009176 31519369 31519573 35009388
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 753 Status Report Messages:
STATUS REPORT #3 ON WW 753
VALID 020455Z - 020540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NNW LFK
TO 40 E SHV.
..GUYER..10/02/09
ATTN...WFO...LZK...SHV...
&&
STATUS REPORT FOR WS 753
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC013-031-061-081-111-020540-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE DE SOTO LINCOLN
RED RIVER UNION
$$
TXC347-419-020540-
TX
. TEXAS COUNTIES INCLUDED ARE
NACOGDOCHES SHELBY
$$
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.
$$
STATUS REPORT #2 ON WW 753
VALID 020340Z - 020440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SSW TYR
TO 35 SW ELD TO 25 NNE ELD.
..GUYER..10/02/09
ATTN...WFO...LZK...SHV...
&&
STATUS REPORT FOR WS 753
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC011-025-069-139-020440-
AR
. ARKANSAS COUNTIES INCLUDED ARE
BRADLEY CLEVELAND JEFFERSON
UNION
$$
LAC013-015-017-027-031-061-081-111-119-020440-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE BOSSIER CADDO
CLAIBORNE DE SOTO LINCOLN
RED RIVER UNION WEBSTER
$$
TXC347-365-401-419-020440-
TX
. TEXAS COUNTIES INCLUDED ARE
NACOGDOCHES PANOLA RUSK
SHELBY
$$
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.
$$
STATUS REPORT #1 ON WW 753
VALID 020150Z - 020240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 W TXK TO
40 NE TXK TO 20 SE RUE.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 2056
..GUYER..10/02/09
ATTN...WFO...LZK...SHV...
&&
STATUS REPORT FOR WS 753
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC011-013-019-025-027-039-051-053-057-059-069-073-091-099-103-
105-119-125-139-020240-
AR
. ARKANSAS COUNTIES INCLUDED ARE
BRADLEY CALHOUN CLARK
CLEVELAND COLUMBIA DALLAS
GARLAND GRANT HEMPSTEAD
HOT SPRING JEFFERSON LAFAYETTE
MILLER NEVADA OUACHITA
PERRY PULASKI SALINE
UNION
$$
LAC013-015-017-027-031-061-081-111-119-020240-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE BOSSIER CADDO
CLAIBORNE DE SOTO LINCOLN
RED RIVER UNION WEBSTER
$$
TXC037-067-183-203-315-343-347-365-401-419-020240-
TX
. TEXAS COUNTIES INCLUDED ARE
BOWIE CASS GREGG
HARRISON MARION MORRIS
NACOGDOCHES PANOLA RUSK
SHELBY
$$
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
|
Low (20%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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.