Severe Thunderstorm Warning 246, NWS Lubbock, TX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LUBBOCK TX
331 PM CDT THU SEP 27 2007

.SHORT TERM...
MOIST AND UNSTABLE ATMOSPHERE IS IN PLACE ACROSS THE AREA.
THUNDERSTORMS HAVE INITIATED ALONG A WEAK BOUNDARY ACROSS THE
WESTERN SOUTH PLAINS. SURFACE BASED CAPES ARE NEAR 1000 J/KG WITH
HIGHER VALUES OVER 2000 J/KG ACROSS THE SOUTHERN SOUTH PLAINS...SO
STORMS MAY INTENSIFY AS THEY PROPAGATE SE INTO AREA OF HIGHER
INSTABILITY. WITH AN UPPER LEVEL RIDGE BUILDING ACROSS THE SOUTHERN
HIGH PLAINS...WIND SHEAR IS RELATIVELY WEAK...SO STORMS MAY BE PULSE
SEVERE OR SLOW MOVING MULTICELL STRUCTURES WITH SLIGHT RISK OF HAIL
AND DOWNBURST WINDS.

FRIDAY...WINDS ARE EXPECTED TO INCREASE WITH SURFACE HIGH MOVING
FARTHER EAST OF THE REGION...AND PRESSURES FALLING ACROSS THE
CENTRAL HIGH PLAINS AS SOUTHWEST FLOW ALOFT INCREASES WITH DEEPENING
TROUGH DEVELOPING ACROSS THE NORTHWESTERN CONUS. WITH STRONG UPSLOPE
FLOW AND MOISTURE ADVECTION...WILL LIKELY SEE A FEW STORMS AGAIN
TOMORROW ALTHOUGH COVERAGE MAY BE LIMITED. WARM AND HUMID TOMORROW
WITH HIGHS GENERALLY IN THE MID 80S.

.LONG TERM...
SOUTHWEST FLOW ALOFT WILL CONTINUE TO INCREASE FRIDAY NIGHT INTO
SATURDAY AS STRONG UPPER TROUGH TRANSLATES EAST ACROSS THE GREAT
BASIN. THE NORTHWEST HALF OF THE CWFA WILL CONTINUE TO BE THE
FAVORED AREA FOR STORMS FRI EVENING DUE TO INCREASING ASCENT AND
SFC CONVERGENCE ALONG SFC PRESS TROUGH AXIS. FOR SATURDAY...BOTH
THE WRF AND GFS INDICATE THE STRONG SHORTWAVE MOVING THROUGH THE
FOUR CORNERS...WITH THE GFS A LITTLE STRONGER AND FARTHER SOUTH
WITH AN UPPER LOW POSSIBLY CLOSING OFF. THIS WILL BE THE ACCEPTED
TREND FOR THIS FORECAST RESULTING IN A LITTLE SLOWER PROGRESSION
OF THE WAVE.

SCATTERED STORMS OVER THE EASTERN PLAINS OF NEW MEXICO SAT AFTERNOON
SHOULD TRANSLATE INTO THE WESTERN PANHANDLES AND NORTHWEST SO PLAINS
SAT EVENING AS STRONGEST LIFT ARRIVES. SEVERE POTENTIAL WILL HAVE TO
BE WATCHED CLOSELY AS LOW TO MID LEVEL SHEAR INCREASES AND POSES A
THREAT FOR SOME SUPERCELL DEVELOPMENT WITH LARGE HAIL AND STRONG
WINDS. NEGATIVE FACTORS FOR STORM DEVELOPMENT INCLUDE POTENTIAL CAP
LATE SAT...BUT RIGHT NOW IT LOOKS AS THOUGH TEMPS IN THE MID 80S
SHOULD PROVIDE ENOUGH SPARK FOR INITIATION.

PRECIPITATION THREAT WILL DECREASE FROM WEST TO EAST BY 12 SUN AS
MID LEVEL TROUGH AXIS EXITS TO THE EAST AND DRIER AIR ADVECTS INTO
WEST TEXAS. HOWEVER...DECIDED TO KEEP A SLIGHT CHC THROUGH MOST OF
SUNDAY DUE TO WEAK FROPA LURKING ACRS THE SOUTH PLAINS INTO THE
ROLLING PLAINS.

FOR NEXT WEEK...WEATHER LOOKS TO BE RATHER BENIGN AS ACTIVE STORM
TRACK REMAINS FROM THE PAC NORTHWEST INTO THE NORTHERN PLAINS...WITH
A RELATIVELY ZONAL FLOW OVER THE SOUTHERN PLAINS.

&&

.PRELIMINARY POINT TEMPS/POPS...
FRIONA        58  84  58  83  58 /  20  30  30  30  30
TULIA         58  85  60  83  59 /  20  20  30  20  30
PLAINVIEW     59  85  61  83  60 /  20  20  20  20  30
LEVELLAND     61  86  61  84  61 /  20  20  20  20  20
LUBBOCK       62  86  63  84  63 /  30  20  20  20  20
BROWNFIELD    62  86  62  85  63 /  20  20  20  20  20
CHILDRESS     65  87  63  86  64 /  30  20  10  10  30
SPUR          65  87  63  85  65 /  30  20  10  10  20
ASPERMONT     66  87  64  87  66 /  30  20  10  10  20

&&

.LUB WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

06/21

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LUBBOCK TX
252 PM CDT THU SEP 27 2007

TXZ021>044-282000-
PARMER-CASTRO-SWISHER-BRISCOE-HALL-CHILDRESS-BAILEY-LAMB-HALE-
FLOYD-MOTLEY-COTTLE-COCHRAN-HOCKLEY-LUBBOCK-CROSBY-DICKENS-KING-
YOAKUM-TERRY-LYNN-GARZA-KENT-STONEWALL-
252 PM CDT THU SEP 27 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EXTREME SOUTHERN TEXAS
PANHANDLE...SOUTH PLAINS AND ROLLING PLAINS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

CONVECTIVE

ISOLATED STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE AGAIN THIS
AFTERNOON OVER THE CENTRAL AND SOUTHERN SOUTH PLAINS...THEN
SPREADING OVER THE ROLLING PLAINS THIS EVENING. THE MAIN THREATS
WITH THESE STORMS WILL BE DAMAGING WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ON SATURDAY...THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS EASTERN NEW
MEXICO. THESE STORMS MAY FORM A SQUALL LINE AND MOVE EAST INTO
WESTERN PORTIONS OF THE PANHANDLE AND SOUTH PLAINS DURING THE
EVENING HOURS. A FEW OF THESE STORMS MAY PRODUCE SEVERE WEATHER. LARGE
HAIL AND DAMAGING WINDS WILL BE THE PRIMARY THREATS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED THIS EVENING AS THE THREAT OF
ORGANIZED SEVERE WEATHER IS LIMITED.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
333 PM CDT THU SEP 27 2007

TXZ033-039-272100-
COCHRAN TX-YOAKUM TX-
333 PM CDT THU SEP 27 2007

...STRONG THUNDERSTORM ACROSS YOAKUM AND COCHRAN COUNTIES...

AT 327 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER SOUTHERN COCHRAN COUNTY...ABOUT 15 MILES
NORTH OF PLAINS...MOVING EAST AT 5 TO 10 MPH. THIS STORM MAY
PRODUCE SMALL HAIL AND WIND GUSTS TO 50 MPH.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
418 PM CDT THU SEP 27 2007

TXZ033-272200-
COCHRAN TX-
418 PM CDT THU SEP 27 2007

...STRONG THUNDERSTORM ACROSS COCHRAN COUNTY...

AT 413 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 11 MILES SOUTH OF LEHMAN...OR ABOUT 17 MILES
SOUTH OF MORTON...DEVELOPING NORTHEAST AT 10 MPH. THIS STORM MAY
IMPACT LEHMAN AND WHITEFACE.

SMALL HAIL AND BRIEF...STRONG WIND GUSTS OVER 50 MPH ARE POSSIBLE
NEAR THIS THUNDERSTORM. MOVE TO A PLACE OF SAFETY IF THREATENING
WEATHER APPROACHES. STAY AWAY FROM WINDOWS.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
436 PM CDT THU SEP 27 2007

TXZ032-038-272200-
COTTLE TX-KING TX-
436 PM CDT THU SEP 27 2007

...STRONG THUNDERSTORM ACROSS KING AND COTTLE COUNTIES...

AT 433 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 3 MILES NORTHWEST OF FINNEY...OR ABOUT 14 MILES
NORTH OF GUTHRIE...WITH ANOTHER STRONG STORM 10 MILE NORTHWEST OF
PADUCAH. BOTH STORMS WERE NEARLY STATIONARY.

SMALL HAIL...STRONG WIND GUSTS IN EXCESS OF 50 MPH...CLOUD TO GROUND
LIGHTNING AND HEAVY RAIN ARE POSSIBLE NEAR THE THUNDERSTORMS. MOVE
TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES. STAY AWAY
FROM WINDOWS.

PERSONS IN THE PATH OF THESE STORMS SHOULD CLOSELY MONITOR WEATHER
RADIO OR OTHER MEDIA FOR OTHER UPDATES AND POSSIBLE WARNINGS. BE
PREPARED TO TAKE ACTION IF A WARNING IS ISSUED.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LUBBOCK TX
617 PM CDT THU SEP 27 2007

TXZ028-029-272345-
HALE TX-LAMB TX-
617 PM CDT THU SEP 27 2007

...STRONG THUNDERSTORM ACROSS LAMB AND HALE COUNTIES...

AT 614 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS STRETCHING WEST SOUTHWEST TO EAST
SOUTHEAST EITHER SIDE OF COTTON CENTER...WITH LITTLE MOTION.

SMALL HAIL AND GUSTY WINDS ARE EXPECTED WITH THIS STORM.
ADDITIONALLY...THIS STORM IS LOCATED OVER A WIND SHIFT BOUNDARY AND
DOES HAVE THE POTENTIAL TO PRODUCE A BRIEF SPIN UP TORNADO AS IT HAS
IN THE PAST. IF CAUGHT OUTSIDE...SEEK SHELTER INDOORS. STAY AWAY
FROM WINDOWS.

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