Flash Flood Warning 7, NWS Amarillo, TX

000 
WGUS74 KAMA 100218
FFSAMA

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
918 PM CDT SUN AUG 9 2009

TXC065-375-100500-
/O.CON.KAMA.FF.W.0007.000000T0000Z-090810T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
POTTER TX-CARSON TX-
918 PM CDT SUN AUG 9 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR
CARSON AND POTTER COUNTIES...

AT 909 PM CDT...THE PUBLIC REPORTED FLASH FLOODING IN THE WARNED 
AREA. THOUGH MOST OF THE STORMS HAVE EXITED THE AREA...SOME 
LOCATIONS RECEIVED OVER 4 INCHES OF RAIN...THEREFORE WATER OVER 
ROADWAYS WILL BE SLOW TO RECEDE.

REMAINING THUNDERSTORMS SHOULD DISSIPATE OVER THE NEXT FEW HOURS.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 55 AND 99.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 3562 10202 3561 10118 3518 10135 3519 10212

$$

SJOHNSON

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE AMARILLO TX
642 PM CDT SUN AUG 9 2009

.AVIATION...
FOR THE 00Z TAFS...COLD FRONT JUST REACHING KAMA WILL BE RESPONSIBLE
FOR THE VARIABLE WIND DIRECTIONS OVER THE NEXT 6 HOURS AND THE
THUNDERSTORMS BRINGING IFR CONDITIONS TO KAMA. ONCE THE STORMS
PASS...VFR CONDITIONS ARE EXPECTED THROUGH THE TAF PERIOD...THOUGH
CONVECTION MAY DEVELOP TOWARDS THE TAIL END OF THE TAF PERIOD.

SJOHNSON
&&

.PREV DISCUSSION... /ISSUED 239 PM CDT SUN AUG 9 2009/

DISCUSSION...
A COLD FRONT HAS SLID INTO THE OK PANHANDLE AND NORTHWEST HALF OF THE
TX PANHANDLE THIS AFTERNOON PROVIDING QUITE A CONTRAST IN TEMPS
ACROSS THE CWA. CURRENT SFC TEMPS RANGE FROM THE MID/UPPER 90S IN THE
SOUTHEAST TO NEAR 80 IN THE NORTHWEST. THE SUBTROPICAL MOISTURE PLUME
CONTINUES TO STREAM ACROSS THE AREA SUPERIMPOSED OVER THE TOP OF THE
LOW LEVEL CONVERGENT ZONE AND SHOULD PROVIDE A DECENT OPPORTUNITY FOR
SHOWERS AND THUNDERSTORMS. A NARROW BAND OF ELEVATED SHOWERS WITH A
FEW EMBEDDED THUNDERSTORMS HAS PERSISTED THROUGH MOST OF THE DAY
ACROSS THE WESTERN/NORTHERN ZONES IN AN AREA OF ENHANCED MESOSCALE
LIFT. PER THE 12Z RAOB DATA...A 100KT JET STREAK WAS LOCATED ACROSS
THE CENTRAL PLAINS WITH THE PANHANDLES FAVORABLY POSITIONED IN THE
RIGHT ENTRANCE REGION. COMBINED WITH THE FORCING AHEAD OF A SUBTLE
SHORTWAVE MOVING ACROSS THE FOUR CORNERS...LIFT HAS ALLOWED THE
INSTABILITY SUGGESTED BY THE MORNING ACCAS FIELD TO BE REALIZED. THE
FIRST SURFACE BASED THUNDERSTORM DEVELOPED RECENTLY IN NORTHWEST OK
WHERE TEMPS HAVE APPROACHED 100 DEGREES. SLIGHT CHANCE POPS HAVE BEEN
INCLUDED THROUGH THIS EVENING ACROSS ALL BUT THE EXTREME SOUTHEAST
PART OF THE CWA.

THE COLD FRONT IS FORECAST TO HANG UP THIS EVENING ACROSS THE
PANHANDLES AND WILL COMPLICATE MATTERS FOR MONDAY/TUESDAY. THE
MODELS WANT TO MIX THIS BOUNDARY OUT FOR MONDAY WITH SLIGHTLY ABOVE
NORMAL TEMPS AND SOUTHERLY WINDS RETURNING BY THE AFTERNOON. THIS
IDEA WAS GENERALLY FOLLOWED ALTHOUGH GUIDANCE TEMPS WERE UNDERCUT IN
THE NORTH. SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP DURING
THE AFTERNOON HOURS AS THE LEE TROF SHARPENS AND ENHANCES LOW LEVEL
CONVERGENCE ACROSS THE NORTHWEST. WITH WEST TO NORTHWEST FLOW ALOFT
BY MONDAY EVENING...THESE SHOWERS AND THUNDERSTORMS /IN ADDITION TO
THE DIURNAL MOUNTAIN STORMS/ WILL PROPAGATE INTO THE REMAINDER OF
THE AREA...ESPECIALLY AFTER 00Z. THE COLD FRONT IS THEN PROGGED TO
DIVE SOUTH MONDAY NIGHT. ENHANCED UPSLOPE FLOW AND SYNOPTIC FORCING
WILL SUPPORT CHANCE POPS IN MOST AREAS WITH THE POTENTIAL EXISTING
FOR LOCALLY HEAVY RAINFALL. PWATS ARE FORECAST TO EXCEED 1.5 INCHES
ACROSS MUCH OF THE NORTH/EAST BY THIS TIME. STORMS WILL BE POSSIBLE
ON TUESDAY AND TUESDAY NIGHT AS THE FRONT REMAINS IN THE VICINITY AND
NORTHWEST FLOW PERSISTS. A FEW STORMS COULD BECOME SEVERE WITH PEAK
HEATING MONDAY AND TUESDAY...WITH THE PRIMARY THREATS BEING LARGE
HAIL AND DAMAGING WINDS.

DAYTIME POPS WERE RETAINED OVER THE EAST/CENTRAL ZONES ON WEDNESDAY
GIVEN THE MOIST/UNSTABLE AIRMASS IN PLACE. PWATS ARE PROGGED TO
REMAIN CLOSE TO 1.5 INCHES. GFS BUFKIT DATA INDICATES AN UNCAPPED
ATMOSPHERE WITH DECENT HODOGRAPHS SO SEVERE WEATHER CANNOT BE RULED
OUT. ALSO...SLIGHT CHANCE POPS WERE RETAINED AREAWIDE ON WEDNESDAY
GIVEN THE PERSISTENT NORTHWEST FLOW ALOFT. TEMPS ARE PROGGED TO
REMAIN NEAR CLIMO THURSDAY AND BEYOND WITH EVENING CONVECTION
POSSIBLE THROUGH FRIDAY. THE WEEKEND FORECAST REMAINS DRY AT THIS
TIME.

JOHNSON

FIRE WEATHER...
FIRE WEATHER CONCERNS ACROSS THE PANHANDLES WILL REMAIN LIMITED OVER
THE NEXT 7 DAYS. TEMPERATURES WILL CONTINUE TO HOVER AROUND SEASONAL
NORMALS WITH THUNDERSTORMS POSSIBLE MOST DAYS...MAINLY IN THE
AFTERNOON AND EVENING HOURS. MINIMUM RELATIVE HUMIDITIES ARE
FORECAST TO REMAIN ABOVE 25 PERCENT IN MOST AREAS WITH 20FT WIND
SPEEDS LESS THAN 15 MPH. THE MAIN CONCERN WILL BE THE POTENTIAL FOR
LIGHTNING.

JOHNSON

&&

.AMA WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
OK...NONE.

&&

16/08

TEXAS/OKLAHOMA PANHANDLES HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AMARILLO TX
100 PM CDT SUN AUG 9 2009

OKZ001>003-TXZ001>020-101100-
ARMSTRONG-BEAVER-CARSON-CIMARRON-COLLINGSWORTH-DALLAM-DEAF SMITH-
DONLEY-GRAY-HANSFORD-HARTLEY-HEMPHILL-HUTCHINSON-LIPSCOMB-MOORE-
OCHILTREE-OLDHAM-POTTER-RANDALL-ROBERTS-SHERMAN-TEXAS-WHEELER-
100 PM CDT SUN AUG 9 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE TEXAS AND OKLAHOMA
PANHANDLES.

.DAY ONE...

ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND
EVENING ACROSS THE OKLAHOMA PANHANDLE AND MOST OF THE TEXAS
PANHANDLE. A FEW OF THE STORMS THAT FORM MAY APPROACH SEVERE
LEVELS...WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS.

.DAYS TWO THROUGH SEVEN...

THERE IS A SLIGHT CHANCE TO CHANCE OF THUNDERSTORMS ACROSS MUCH OF
THE OKLAHOMA AND TEXAS PANHANDLES MONDAY AFTERNOON THROUGH WEDNESDAY
NIGHT. THERE IS ALSO A SLIGHT CHANCE OF THUNDERSTORMS OVER NORTHWEST
SECTIONS OF THE OKLAHOMA AND TEXAS PANHANDLES THURSDAY NIGHT AND
FRIDAY NIGHT. SOME OF THE STORMS THAT DEVELOP MAY APPROACH SEVERE
LEVELS...WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. IN
ADDITION...LOCALLY HEAVY RAINFALL WILL BE POSSIBLE...WHICH MAY LEAD
TO LOCALIZED FLOODING OR FLASH FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

ANDRADE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
611 PM CDT SUN AUG 09 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0610 PM     HAIL             AMARILLO                35.20N 101.82W
08/09/2009  E0.75 INCH       POTTER             TX   NWS OFFICE

            ISOLATED PENNY SIZE HAIL WITH CONSIDERABLE MARBLE SIZE
            HAIL

&&

EVENT NUMBER AMA0900154

NUNEZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AMARILLO TX
624 PM CDT SUN AUG 09 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0617 PM     HAIL             AMARILLO                35.20N 101.82W
08/09/2009  E0.75 INCH       POTTER             TX   NWS EMPLOYEE

            A FEW PENNY SIZE HAIL AND CONSIDERABLE ONE HALF INCH
            HAIL... LOOP 335 AND FRITCH HIGHWAY

&&

EVENT NUMBER AMA0900155

NUNEZ

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE AMARILLO TX
629 PM CDT SUN AUG 09 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0610 PM     HAIL             7 ENE AMARILLO          35.24N 101.70W
08/09/2009  E0.75 INCH       POTTER             TX   NWS OFFICE

            ISOLATED PENNY SIZE HAIL WITH CONSIDERABLE MARBLE SIZE
            HAIL AT NWS OFFICE

&&

CORRECTED REMARKS

EVENT NUMBER AMA0900154

NUNEZ

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE AMARILLO TX
632 PM CDT SUN AUG 09 2009

..TIME..    ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE..    ....MAG....     ..COUNTY LOCATION.. ST.. ...SOURCE....
            ..REMARKS..

0617 PM     HAIL             6 NE AMARILLO           35.26N 101.74W
08/09/2009  E0.75 INCH       POTTER             TX   NWS EMPLOYEE

            A FEW PENNY SIZE HAIL AND CONSIDERABLE ONE HALF INCH
            HAIL... LOOP 335 AND FRITCH HIGHWAY

&&

CORRECTED LOCATION

EVENT NUMBER AMA0900155

NUNEZ

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
707 PM CDT SUN AUG 9 2009

TXZ011>013-100030-
OLDHAM TX-POTTER TX-CARSON TX-
707 PM CDT SUN AUG 9 2009

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY EFFECTIVE UNTIL 730 PM CDT FOR CARSON...POTTER AND
OLDHAM COUNTIES.

AT 706 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS FROM 6 MILES SOUTH OF BOYS RANCH TO
PANTEX...MOVING NORTHEAST AT 15 MPH.

UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

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.

SJOHNSON

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
735 PM CDT SUN AUG 9 2009

TXZ011>013-100100-
OLDHAM TX-POTTER TX-CARSON TX-
735 PM CDT SUN AUG 9 2009

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY EFFECTIVE UNTIL 800 PM CDT FOR CARSON...POTTER AND
OLDHAM COUNTIES.

AT 735 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORMS FROM BOYS RANCH TO PANHANDLE...MOVING
EAST AT 15 MPH.

UP TO ONE HALF INCH SIZE HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE.

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.

SJOHNSON