Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 630
NWS STORM PREDICTION CENTER NORMAN OK
755 AM CDT TUE JUL 28 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN ARKANSAS
NORTHERN LOUISIANA
NORTHEAST TEXAS
EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 755 AM UNTIL
300 PM CDT.
TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTHWEST OF
LONGVIEW TEXAS TO 5 MILES SOUTH OF MONROE LOUISIANA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU0).
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.
DISCUSSION...TSTMS EXPECTED TO CONTINUE FORMING AHEAD OF NE TX UPR
VORT AS SYSTEM CONTINUES GENERALLY E INTO SRN AR THROUGH MIDDAY.
COMBINATION OF VERY RICH MOISTURE AVAILABILITY /PW AOA 2.25
INCHES/...APPRECIABLE LOW LVL SPEED/DIRECTIONAL SHEAR PER KSHV
VWP...AND INCREASING SBCAPE WITH SFC HEATING UPSTREAM ACROSS
CNTRL/SRN LA TOGETHER SUGGEST POTENTIAL FOR ISOLD TORNADOES AND WET
MICROBURSTS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 27025.
...CORFIDI
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 630 TORNADO AR LA TX 281255Z - 282000Z
AXIS..50 STATUTE MILES NORTH AND SOUTH OF LINE..
45NW GGG/LONGVIEW TX/ - 5S MLU/MONROE LA/
..AVIATION COORDS.. 45NM N/S /36NW GGG - 4S MLU/
HAIL SURFACE AND ALOFT..0.5 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025.
LAT...LON 33569526 33169202 31719202 32119526
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 630 Status Report Messages:
STATUS REPORT #5 ON WW 630
VALID 281840Z - 281940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 N IER TO
40 S MLU.
..PETERS..07/28/09
ATTN...WFO...SHV...
&&
STATUS REPORT FOR WT 630
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC043-059-069-127-281940-
LA
. LOUISIANA PARISHES INCLUDED ARE
GRANT LA SALLE NATCHITOCHES
WINN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 630
VALID 281740Z - 281840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 N IER TO
35 SW MLU TO 5 N MLU.
..PETERS..07/28/09
ATTN...WFO...SHV...
&&
STATUS REPORT FOR WT 630
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC021-043-049-059-069-073-127-281840-
LA
. LOUISIANA PARISHES INCLUDED ARE
CALDWELL GRANT JACKSON
LA SALLE NATCHITOCHES OUACHITA
WINN
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 630
VALID 281640Z - 281740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NNE TYR
TO 30 NNW SHV TO 40 SSW ELD TO 15 SSE ELD TO 35 N MLU.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1698.
..PETERS..07/28/09
ATTN...WFO...SHV...
&&
STATUS REPORT FOR WT 630
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
LAC013-015-017-021-027-031-043-049-059-061-069-073-081-111-119-
127-281740-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE BOSSIER CADDO
CALDWELL CLAIBORNE DE SOTO
GRANT JACKSON LA SALLE
LINCOLN NATCHITOCHES OUACHITA
RED RIVER UNION WEBSTER
WINN
$$
TXC183-203-315-365-401-423-459-499-281740-
TX
. TEXAS COUNTIES INCLUDED ARE
GREGG HARRISON MARION
PANOLA RUSK SMITH
UPSHUR WOOD
$$
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.
$$
STATUS REPORT #2 ON WW 630
VALID 281545Z - 281640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 N TYR TO
35 NNE SHV TO 30 WNW ELD.
..PETERS..07/28/09
ATTN...WFO...SHV...
&&
STATUS REPORT FOR WT 630
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC027-139-281640-
AR
. ARKANSAS COUNTIES INCLUDED ARE
COLUMBIA UNION
$$
LAC013-015-017-021-027-031-043-049-059-061-069-073-081-111-119-
127-281640-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE BOSSIER CADDO
CALDWELL CLAIBORNE DE SOTO
GRANT JACKSON LA SALLE
LINCOLN NATCHITOCHES OUACHITA
RED RIVER UNION WEBSTER
WINN
$$
TXC183-203-315-365-401-423-459-499-281640-
TX
. TEXAS COUNTIES INCLUDED ARE
GREGG HARRISON MARION
PANOLA RUSK SMITH
UPSHUR WOOD
$$
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.
$$
STATUS REPORT #1 ON WW 630
VALID 281450Z - 281540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SSE PRX
TO 45 WSW TXK TO 10 W TXK.
..PETERS..07/28/09
ATTN...WFO...SHV...
&&
STATUS REPORT FOR WT 630
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC027-073-091-139-281540-
AR
. ARKANSAS COUNTIES INCLUDED ARE
COLUMBIA LAFAYETTE MILLER
UNION
$$
LAC013-015-017-021-027-031-043-049-059-061-069-073-081-111-119-
127-281540-
LA
. LOUISIANA PARISHES INCLUDED ARE
BIENVILLE BOSSIER CADDO
CALDWELL CLAIBORNE DE SOTO
GRANT JACKSON LA SALLE
LINCOLN NATCHITOCHES OUACHITA
RED RIVER UNION WEBSTER
WINN
$$
TXC063-067-183-203-315-343-365-401-423-459-499-281540-
TX
. TEXAS COUNTIES INCLUDED ARE
CAMP CASS GREGG
HARRISON MARION MORRIS
PANOLA RUSK SMITH
UPSHUR WOOD
$$
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 (30%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
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
|
Mod (50%)
|
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 
