Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 661
NWS STORM PREDICTION CENTER NORMAN OK
635 PM CDT TUE AUG 4 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
MIDDLE AND PARTS OF WESTERN TENNESSEE
EFFECTIVE THIS TUESDAY EVENING FROM 635 PM UNTIL 1100 PM 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 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES EAST
SOUTHEAST OF NASHVILLE TENNESSEE TO 20 MILES WEST NORTHWEST OF
JACKSON TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
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 657...WW 658...WW
659...WW 660...
DISCUSSION...INTENSE SQUALL LINE WRN KY CONTINUES SEWD AND WILL
MAINTAIN DAMAGING WIND THREAT AS AIR MASS TN REMAINS VERY MOIST AND
UNSTABLE.
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 550. MEAN STORM
MOTION VECTOR 33035.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 661 SEVERE TSTM TN 042335Z - 050400Z
AXIS..55 STATUTE MILES NORTH AND SOUTH OF LINE..
65ESE BNA/NASHVILLE TN/ - 20WNW MKL/JACKSON TN/
..AVIATION COORDS.. 50NM N/S /53NNW GQO - 19S DYR/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 33035.
LAT...LON 34978561 34908925 36508925 36568561
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 661 Status Report Messages:
STATUS REPORT #4 ON WW 661
VALID 050335Z - 050440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 WSW CKV TO
25 SW BNA TO 50 SSE BNA TO 45 WSW CSV TO 30 WNW CSV.
..EDWARDS..08/05/09
ATTN...WFO...OHX...MEG...HUN...
&&
STATUS REPORT FOR WS 661
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TNC003-005-017-021-023-031-033-039-043-045-051-053-055-061-069-
071-075-077-079-081-083-085-095-099-101-103-109-113-117-119-125-
127-131-135-161-177-181-183-187-050440-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BEDFORD BENTON CARROLL
CHEATHAM CHESTER COFFEE
CROCKETT DECATUR DICKSON
DYER FRANKLIN GIBSON
GILES GRUNDY HARDEMAN
HARDIN HAYWOOD HENDERSON
HENRY HICKMAN HOUSTON
HUMPHREYS LAKE LAWRENCE
LEWIS LINCOLN MCNAIRY
MADISON MARSHALL MAURY
MONTGOMERY MOORE OBION
PERRY STEWART WARREN
WAYNE WEAKLEY WILLIAMSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 661
VALID 050245Z - 050340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SW HOP TO
25 WSW BNA TO 15 S BNA TO 25 E BNA TO 35 SE BWG.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSIONS 1780-1781.
..EDWARDS..08/05/09
ATTN...WFO...OHX...MEG...HUN...
&&
STATUS REPORT FOR WS 661
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TNC003-005-015-017-021-023-031-033-039-043-045-051-053-055-061-
069-071-075-077-079-081-083-085-095-099-101-103-109-113-117-119-
125-127-131-135-149-161-177-181-183-187-050340-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BEDFORD BENTON CANNON
CARROLL CHEATHAM CHESTER
COFFEE CROCKETT DECATUR
DICKSON DYER FRANKLIN
GIBSON GILES GRUNDY
HARDEMAN HARDIN HAYWOOD
HENDERSON HENRY HICKMAN
HOUSTON HUMPHREYS LAKE
LAWRENCE LEWIS LINCOLN
MCNAIRY MADISON MARSHALL
MAURY MONTGOMERY MOORE
OBION PERRY RUTHERFORD
STEWART WARREN WAYNE
WEAKLEY WILLIAMSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 661
VALID 050155Z - 050240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE SPC MESOSCALE DISCUSSION 1780.
..EDWARDS..08/05/09
ATTN...WFO...OHX...MEG...HUN...
&&
STATUS REPORT FOR WS 661
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TNC003-005-015-017-021-023-031-033-039-043-045-051-053-055-061-
069-071-075-077-079-081-083-085-095-099-101-103-109-113-117-119-
125-127-131-135-149-161-177-181-183-187-050240-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BEDFORD BENTON CANNON
CARROLL CHEATHAM CHESTER
COFFEE CROCKETT DECATUR
DICKSON DYER FRANKLIN
GIBSON GILES GRUNDY
HARDEMAN HARDIN HAYWOOD
HENDERSON HENRY HICKMAN
HOUSTON HUMPHREYS LAKE
LAWRENCE LEWIS LINCOLN
MCNAIRY MADISON MARSHALL
MAURY MONTGOMERY MOORE
OBION PERRY RUTHERFORD
STEWART WARREN WAYNE
WEAKLEY WILLIAMSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 661
VALID 050035Z - 050140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE SPC MESOSCALE DISCUSSION 1778.
..EDWARDS..08/05/09
ATTN...WFO...OHX...MEG...HUN...
&&
STATUS REPORT FOR WS 661
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TNC003-005-015-017-021-023-031-033-039-043-045-051-053-055-061-
069-071-075-077-079-081-083-085-095-099-101-103-109-113-117-119-
125-127-131-135-149-161-177-181-183-187-050140-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BEDFORD BENTON CANNON
CARROLL CHEATHAM CHESTER
COFFEE CROCKETT DECATUR
DICKSON DYER FRANKLIN
GIBSON GILES GRUNDY
HARDEMAN HARDIN HAYWOOD
HENDERSON HENRY HICKMAN
HOUSTON HUMPHREYS LAKE
LAWRENCE LEWIS LINCOLN
MCNAIRY MADISON MARSHALL
MAURY MONTGOMERY MOORE
OBION PERRY RUTHERFORD
STEWART WARREN WAYNE
WEAKLEY WILLIAMSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (<5%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
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.
weather.gov 
