Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 864
NWS STORM PREDICTION CENTER NORMAN OK
1200 PM CDT MON AUG 25 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF NORTHERN ALABAMA
SMALL PART OF SOUTHERN MIDDLE TENNESSEE
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
PM CDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 40 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 70 MILES EAST OF HUNTSVILLE
ALABAMA TO 20 MILES SOUTH SOUTHWEST OF MUSCLE SHOALS ALABAMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).
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.
OTHER WATCH INFORMATION...CONTINUE...WW 863...
DISCUSSION...BANDS OF THUNDERSTORMS CONTINUE TO ROTATE NWD E OF
REMNANTS OF FAY OVER CENTRAL MS. WITH 30-40KT OF LOW LEVEL SHEAR
AND A VERY MOIST AIR MASS THERE WILL BE A CONTINUED THREAT OF SMALL
SUPERCELLS EMBEDDED IN THE BANDS ALONG WITH ISOLATED TORNADOES.
THREAT EXPECTED TO GRADUALLY SHIFT NWD THRU THE WATCH AREA THIS
AFTERNOON.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION VECTOR 18030.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 864 TORNADO AL TN 251700Z - 260000Z
AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
70E HSV/HUNTSVILLE AL/ - 20SSW MSL/MUSCLE SHOALS AL/
..AVIATION COORDS.. 35NM N/S /27SW GQO - 19SW MSL/
WIND GUSTS..60 KNOTS.
MAX TOPS TO 400.MEAN STORM MOTION VECTOR 18030.
LAT...LON 34068555 33908775 35068775 35228555
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 864 Status Report Messages:
STATUS REPORT #2 ON WW 864
VALID 251935Z - 252040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 W CHA TO
20 NNW MSL.
..PETERS..08/25/08
ATTN...WFO...HUN...OHX...
&&
STATUS REPORT FOR WT 864
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
TNC051-055-099-103-127-181-252040-
TN
. TENNESSEE COUNTIES INCLUDED ARE
FRANKLIN GILES LAWRENCE
LINCOLN MOORE WAYNE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 864
VALID 251825Z - 251940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..PETERS..08/25/08
ATTN...WFO...HUN...OHX...
&&
STATUS REPORT FOR WT 864
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ALC033-043-049-059-071-077-079-083-089-095-103-251940-
AL
. ALABAMA COUNTIES INCLUDED ARE
COLBERT CULLMAN DEKALB
FRANKLIN JACKSON LAUDERDALE
LAWRENCE LIMESTONE MADISON
MARSHALL MORGAN
$$
TNC051-055-099-103-127-181-251940-
TN
. TENNESSEE COUNTIES INCLUDED ARE
FRANKLIN GILES LAWRENCE
LINCOLN MOORE WAYNE
$$
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 (10%)
|
Wind
Probability of 10 or more severe wind events
|
Low (10%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
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 (30%)
|
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.
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