Alert archive / Tennessee / Tornado Watches in 2008

Tornado Watch 11

January 8, 200822 counties in Alabama; 29 counties in Mississippi; 30 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Jan 8, 2008, 6:36 PM CST for 22 counties in Alabama; 29 counties in Mississippi; 30 counties in Tennessee. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 8, 2008, 6:36 PM CST (00:36 UTC)
Expired
Jan 9, 2008, 12:24 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 81 counties

Blount County, AL, Choctaw County, AL, Colbert County, AL, Cullman County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marengo County, AL, Marion County, AL, Morgan County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL, Clarke County, MS, Clay County, MS, Covington County, MS, Forrest County, MS, Greene County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Lowndes County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wayne County, MS, Winston County, MS, Bedford County, TN, Cannon County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lawrence County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Columbus AFB radar (KGWX), 88 km from the middle of the area, began a volume at 00:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
30%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
5%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jan 8, 6:43 PM CSTTornado WarningJANJasper, Smith47 min
Jan 8, 6:44 PM CSTSevere Thunderstorm WarningBMXLamar36 min
Jan 8, 6:58 PM CSTSevere Thunderstorm WarningLIXPike, Walthall32 min
Jan 8, 6:59 PM CSTSevere Thunderstorm WarningBMXLamar, Pickens46 min
Jan 8, 7:10 PM CSTSevere Thunderstorm WarningJANMarion50 min
Jan 8, 7:12 PM CSTSevere Thunderstorm WarningBMXFayette, Tuscaloosa33 min
Jan 8, 7:28 PM CSTSevere Thunderstorm WarningJANKemper, Noxubee, Winston47 min
Jan 8, 7:44 PM CSTSevere Thunderstorm WarningBMXFayette, Tuscaloosa, Walker31 min
Jan 8, 7:44 PM CSTSevere Thunderstorm WarningJANKemper46 min
Jan 8, 7:44 PM CSTSevere Thunderstorm WarningJANSimpson, Smith46 min
Jan 8, 8:09 PM CSTSevere Thunderstorm WarningHUNLimestone21 min
Jan 8, 8:19 PM CSTSevere Thunderstorm WarningJANClarke, Jasper, Smith41 min
Jan 8, 8:27 PM CSTSevere Thunderstorm WarningHUNLincoln, Moore33 min
Jan 8, 8:29 PM CSTSevere Thunderstorm WarningHUNLimestone16 min
Jan 8, 8:31 PM CSTSevere Thunderstorm WarningLIXAmite, Pike44 min
Jan 8, 8:34 PM CSTSevere Thunderstorm WarningJANForrest, Lamar41 min
Jan 8, 8:37 PM CSTSevere Thunderstorm WarningJANLauderdale38 min
Jan 8, 8:41 PM CSTSevere Thunderstorm WarningJANJasper, Newton34 min
Jan 8, 9:01 PM CSTSevere Thunderstorm WarningJANClarke, Jasper44 min
Jan 8, 9:02 PM CSTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore28 min
Jan 8, 9:16 PM CSTSevere Thunderstorm WarningLIXPike, Walthall32 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.6 hours before the alert went out and 155 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2008-01-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2008-01-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 289 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
9 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
864 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
289 m²/s²
0-3 km storm-relative helicity
336 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

210 
WWUS20 KWNS 090037
SEL1  
SPC WW 090037
ALZ000-MSZ000-TNZ000-090700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 11
NWS STORM PREDICTION CENTER NORMAN OK
640 PM CST TUE JAN 8 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       NORTHERN AND WESTERN ALABAMA
       EASTERN AND SOUTHERN MISSISSIPPI
       MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 640 PM
UNTIL 100 AM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 75 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF
CROSSVILLE TENNESSEE TO 20 MILES EAST SOUTHEAST OF MC COMB
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 10. WATCH NUMBER 10 WILL NOT BE IN EFFECT AFTER 640
PM CST. CONTINUE...WW 9...

DISCUSSION...CHANCE FOR ISOLD TORNADOES AND LOCALLY DAMAGING WIND
EXPECTED TO PERSIST FROM THE MID TN VLY S INTO SRN MS/WRN AL THIS
EVENING AS PREFRONTAL SQLN CONTINUES EWD.  THE STRONGEST MASS
FORCING AND SHEAR WILL LIFT N AWAY FROM REGION WITH TIME.  BUT
PRESENCE OF EXISTING SUSTAINED STORMS IN A SEASONABLY WARM...MOIST
AND HIGHLY SHEARED ENVIRONMENT SUGGEST A CONTINUED SVR RISK THROUGH
AT LEAST MID EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400.
MEAN STORM MOTION VECTOR 25040.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 8, 9:32 PM CSTMesoscale DiscussionSPCBibb, Blount, Chilton, Choctaw, Cullman, DeKalb and 13 more58 min

Nearby

Tornado Watches in Tennessee, 2008Tornado Watches in Mississippi, 2008Tornado Watches in Alabama, 2008Every tornado watch in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.