Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 267
NWS STORM PREDICTION CENTER NORMAN OK
920 AM CDT FRI MAY 8 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
PARTS OF NORTHEAST ARKANSAS
PARTS OF SOUTHERN ILLINOIS
WESTERN KENTUCKY
SOUTHEAST MISSOURI
MUCH OF WESTERN AND MIDDLE TENNESSEE
EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 920 AM UNTIL 400
PM CDT.
TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 105 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF WEST PLAINS
MISSOURI TO 35 MILES EAST SOUTHEAST OF CLARKSVILLE TENNESSEE.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU7).
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 266...
DISCUSSION...A MATURE VERY INTENSE DERECHO IS MOVING VERY RAPIDLY
ALONG THERMAL/INSTABILITY GRADIENT ACROSS MID MS VLY INTO TN AND
LOWER OH VALLEYS. WITH A VERY MOIST UNSTABLE AIR MASS AND STRONG
VEERING SHEAR PROFILES...EMBEDDED TORNADIC SUPERCELLS WILL CONTINUE
TO BE ASSOCIATED WITH THE DERECHO ALONG WITH WIDESPREAD DAMAGING
WINDS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 90 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
650. MEAN STORM MOTION VECTOR 27055.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW7
WW 267 TORNADO AR IL KY MO TN 081420Z - 082100Z
AXIS..90 STATUTE MILES NORTH AND SOUTH OF LINE..
25W UNO/WEST PLAINS MO/ - 35ESE CKV/CLARKSVILLE TN/
..AVIATION COORDS.. 80NM N/S /61SE SGF - 18NNW BNA/
HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..90 KNOTS.
MAX TOPS TO 650. MEAN STORM MOTION VECTOR 27055.
LAT...LON 38049231 37728683 35118683 35459231
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU7.
Watch 267 Status Report Messages:
STATUS REPORT #2 ON WW 267
VALID 081845Z - 081940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 ENE FLP
TO 15 SW POF TO 35 NNW DYR TO 25 S PAH TO 20 NW PAH TO 20 WNW MDH.
..DIAL..05/08/09
ATTN...WFO...MEG...LZK...PAH...LSX...SGF...OHX...
&&
STATUS REPORT FOR WT 267
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC021-031-055-063-065-067-075-093-111-121-135-081940-
AR
. ARKANSAS COUNTIES INCLUDED ARE
CLAY CRAIGHEAD GREENE
INDEPENDENCE IZARD JACKSON
LAWRENCE MISSISSIPPI POINSETT
RANDOLPH SHARP
$$
ILC047-055-059-065-069-077-081-087-127-145-151-165-185-191-193-
199-081940-
IL
. ILLINOIS COUNTIES INCLUDED ARE
EDWARDS FRANKLIN GALLATIN
HAMILTON HARDIN JACKSON
JEFFERSON JOHNSON MASSAC
PERRY POPE SALINE
WABASH WAYNE WHITE
WILLIAMSON
$$
INC051-125-129-147-163-173-081940-
IN
. INDIANA COUNTIES INCLUDED ARE
GIBSON PIKE POSEY
SPENCER VANDERBURGH WARRICK
$$
KYC007-033-035-039-047-055-059-083-101-105-107-139-143-145-149-
157-177-219-221-225-233-081940-
KY
. KENTUCKY COUNTIES INCLUDED ARE
BALLARD CALDWELL CALLOWAY
CARLISLE CHRISTIAN CRITTENDEN
DAVIESS GRAVES HENDERSON
HICKMAN HOPKINS LIVINGSTON
LYON MCCRACKEN MCLEAN
MARSHALL MUHLENBERG TODD
TRIGG UNION WEBSTER
$$
MOC069-155-081940-
MO
. MISSOURI COUNTIES INCLUDED ARE
DUNKLIN PEMISCOT
$$
TNC005-017-021-023-033-037-039-043-045-053-055-075-077-079-081-
083-085-095-097-099-101-113-117-119-125-131-135-147-161-167-181-
183-187-081940-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BENTON CARROLL CHEATHAM
CHESTER CROCKETT DAVIDSON
DECATUR DICKSON DYER
GIBSON GILES HAYWOOD
HENDERSON HENRY HICKMAN
HOUSTON HUMPHREYS LAKE
LAUDERDALE LAWRENCE LEWIS
MADISON MARSHALL MAURY
MONTGOMERY OBION PERRY
ROBERTSON STEWART TIPTON
WAYNE WEAKLEY WILLIAMSON
$$
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.
$$
STATUS REPORT #1 ON WW 267
VALID 081730Z - 081840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 ENE FLP
TO 20 E POF TO 10 SW FAM TO 35 NW FAM.
..DIAL..05/08/09
ATTN...WFO...MEG...LZK...PAH...LSX...SGF...OHX...
&&
STATUS REPORT FOR WT 267
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC021-023-031-055-063-065-067-075-093-111-121-135-137-141-145-
147-081840-
AR
. ARKANSAS COUNTIES INCLUDED ARE
CLAY CLEBURNE CRAIGHEAD
GREENE INDEPENDENCE IZARD
JACKSON LAWRENCE MISSISSIPPI
POINSETT RANDOLPH SHARP
STONE VAN BUREN WHITE
WOODRUFF
$$
ILC003-047-055-059-065-069-077-081-087-127-145-151-153-157-165-
181-185-191-193-199-081840-
IL
. ILLINOIS COUNTIES INCLUDED ARE
ALEXANDER EDWARDS FRANKLIN
GALLATIN HAMILTON HARDIN
JACKSON JEFFERSON JOHNSON
MASSAC PERRY POPE
PULASKI RANDOLPH SALINE
UNION WABASH WAYNE
WHITE WILLIAMSON
$$
INC051-125-129-147-163-173-081840-
IN
. INDIANA COUNTIES INCLUDED ARE
GIBSON PIKE POSEY
SPENCER VANDERBURGH WARRICK
$$
KYC007-033-035-039-047-055-059-075-083-101-105-107-139-143-145-
149-157-177-219-221-225-233-081840-
KY
. KENTUCKY COUNTIES INCLUDED ARE
BALLARD CALDWELL CALLOWAY
CARLISLE CHRISTIAN CRITTENDEN
DAVIESS FULTON GRAVES
HENDERSON HICKMAN HOPKINS
LIVINGSTON LYON MCCRACKEN
MCLEAN MARSHALL MUHLENBERG
TODD TRIGG UNION
WEBSTER
$$
MOC017-023-031-069-123-133-143-155-157-181-186-187-201-207-
081840-
MO
. MISSOURI COUNTIES INCLUDED ARE
BOLLINGER BUTLER CAPE GIRARDEAU
DUNKLIN MADISON MISSISSIPPI
NEW MADRID PEMISCOT PERRY
RIPLEY STE. GENEVIEVE ST. FRANCOIS
SCOTT STODDARD
$$
TNC005-017-021-023-033-037-039-043-045-053-055-075-077-079-081-
083-085-095-097-099-101-113-117-119-125-131-135-147-161-167-181-
183-187-081840-
TN
. TENNESSEE COUNTIES INCLUDED ARE
BENTON CARROLL CHEATHAM
CHESTER CROCKETT DAVIDSON
DECATUR DICKSON DYER
GIBSON GILES HAYWOOD
HENDERSON HENRY HICKMAN
HOUSTON HUMPHREYS LAKE
LAUDERDALE LAWRENCE LEWIS
MADISON MARSHALL MAURY
MONTGOMERY OBION PERRY
ROBERTSON STEWART TIPTON
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
|
Mod (60%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
High (>95%)
|
Probability of 1 or more wind events > 65 knots
|
High (>95%)
|
Hail
Probability of 10 or more severe hail events
|
High (70%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (>95%)
|
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.