Flash Flood Warning 11, NWS Huntsville, AL

AREA FORECAST DISCUSSION...UPDATE
NATIONAL WEATHER SERVICE HUNTSVILLE AL
845 PM CDT FRI AUG 24 2007

.MESOSCALE UPDATE...
INTERESTING NIGHT ON THE RADAR SCOPE WITH A CLASSIC PULSE STORM
ENVIRONMENT.  THIS EVENING...SEVERE PULSE STORMS HAVE REMAINED TO
OUR N AND SE THUS FAR...BUT THE ENVIRONMENT REMAINS SUPPORTIVE OF
DOWNBURST AND HEAT BURST ACTIVITY.  BOUNDARY INTERACTIONS HAVE
CERTAINLY PLAYED A ROLE IN WHERE STORMS FIRE OFF. THERE HAVE BEEN
NUMEROUS SMALL AND LARGER SCALE OUTFLOW BOUNDARIES...TOO NUMEROUS TO
COUNT.  THE LARGEST BOUNDARY IS NOW ENTERING NE AL...RESULTING FROM
THE CLUSTER OF SEVERE STORMS IN NW GA. AN MCS CONTINUES TO PROPAGATE
SW INTO EASTERN AL...JUST S OF LOOKOUT MOUNTAIN.  THUS FAR...IT HAS
JUST CLIPPED SOUTHERN DEKALB COUNTY.  KHTX SHOWS THE BOUNDARY
REACHING INTO CENTRAL JACKSON AND EASTERN MARSHALL COUNTIES.  CANT
RULE OUT RE-DEVELOPMENT ALONG THIS...AT LEAST IN THE NEAR TERM.
FURTHER W...ANOTHER ARC OF STORMS CONTINUES TO PERCOLATE AND DRIFT N
AND NE FROM NE MS THROUGH THE SHOALS INTO SOUTHERN MIDDLE TN...WHERE
NEW DEVELOPMENT IS ON AN UPSWING.  KOHX SOUNDING AT 00Z CALCULATED A
WINDEX OF 63...WHICH WAS CLOSE TO WHAT EARLIER FORECAST SOUNDINGS
HAD INDICATED.  A MEASURED GUST TO 49KT AT KRNC (MCMINNVILLE TN)
OCCURRED AT 0027Z...REFLECTING THE DOWNBURST ENVIRONMENT.  WILL
EXTEND THE 20 POP THRU 12Z GIVEN ALL THE BOUNDARIES AROUND.  IF WE
SEE A NOCTURNAL LLJ DEVELOPMENT LIKE WE HAVE SEEN AS OF LATE...THAT
MAY HELP TO KICK OFF A FEW STORMS AS WELL.
&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...NONE.
TN...NONE.
&&

KULA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
908 PM CDT FRI AUG 24 2007

ALZ001>010-016-TNZ076-096-097-251000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
908 PM CDT FRI AUG 24 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TONIGHT...

ISOLATED THUNDERSTORMS ARE STILL POSSIBLE OVERNIGHT...MAINLY ACROSS
FAR NORTHWEST ALABAMA INTO SOUTHERN MIDDLE TENNESSEE THROUGH
MIDNIGHT.  THESE STORMS WILL BE CAPABLE OF BRIEF BUT GUSTY WINDS UP
TO 45 MPH...HEAVY DOWNPOURS...AND CLOUD TO GROUND LIGHTNING.
AN ISOLATED STORM PRODUCING DAMAGING WIND CANNOT BE RULED OUT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS ARE ANTICIPATED
OVER THE WEEKEND.  ANY STORMS THAT DEVELOP MAY QUICKLY BECOME
STRONG...CONTAINING GUSTY WINDS...SMALL HAIL AND BRIEF HEAVY
DOWNPOURS. A FEW STORMS COULD PRODUCE DOWNBURSTS CAPABLE OF DAMAGING
WINDS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT ANTICIPATED AT THIS TIME.

KULA

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
845 PM CDT FRI AUG 24 2007

TNZ096-250230-
LINCOLN-
845 PM CDT FRI AUG 24 2007

...SIGNIFICANT WEATHER ALERT FOR LINCOLN COUNTY UNTIL 930 PM CDT...

AT 845 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM JUST WEST OF FAYETTEVILLE...MOVING NORTH AT 5
MPH.

DIME SIZE HAIL...WINDS UP TO 50 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  SKINEM.
  HARMS.
  BOONSHILL.
  HOWELL.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

27

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
910 PM CDT FRI AUG 24 2007

ALZ001-250245-
LAUDERDALE-
910 PM CDT FRI AUG 24 2007

...SIGNIFICANT WEATHER ALERT FOR NORTHEASTERN LAUDERDALE COUNTY
UNTIL 945 PM CDT...

AT 910 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM APPROACHING LEXINGTON...MOVING NORTHEAST AT 20
MPH.

WINDS UP TO 40 MPH AND FREQUENT CLOUD TO GROUND LIGHTNING ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  KINGTOWN.
  LEXINGTON.
  ANDERSON.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

27

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
920 PM CDT FRI AUG 24 2007

TNZ076-096-250245-
LINCOLN-MOORE-
920 PM CDT FRI AUG 24 2007

...SIGNIFICANT WEATHER ALERT FOR LINCOLN AND MOORE COUNTIES UNTIL 945
PM CDT...

AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
TRACK STRONG THUNDERSTORMS ACROSS LINCOLN COUNTY. THE STRONGEST
THUNDERSTORM WAS LOCATED NEAR BELLEVILLE...OR 7 MILES NORTH OF
FAYETTEVILLE...MOVING NORTHEAST AT 10 MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  BELLEVILE.
  CHESTNUT RIDGE.
  BOONEVILLE.
  LYNCHBURG.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

27

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
935 PM CDT FRI AUG 24 2007

TNZ097-250315-
FRANKLIN-
935 PM CDT FRI AUG 24 2007

...SIGNIFICANT WEATHER ALERT FOR FRANKLIN COUNTY UNTIL 1015 PM CDT...

AT 935 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR DECHERD...OR JUST NORTHEAST OF WINCHESTER.
THIS STORM WAS NEARLY STATIONARY.

WINDS UP TO 50 MPH AND FREQUENT CLOUD TO GROUND LIGHTNING ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  WINCHESTER.
  EASTERN PORTIONS OF TIMS FORD LAKE.
  DECHERD.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

27

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