Tornado Watch 131

Issued

Apr 11, 2011, 5:11 PM CDT (22:11 UTC)

Expired

Apr 12, 2011, 12:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Nashville radar (KOHX), 108 km from the middle of the area, began a volume at 22:13 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.

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

80%

• Mesoscale Discussion 414Apr 11, 2:44 PM CDT
• Mesoscale Discussion 415Apr 11, 3:56 PM CDT
• Mesoscale Discussion 418Apr 11, 6:42 PM CDT
• Mesoscale Discussion 419Apr 11, 8:23 PM CDT

603 
WWUS20 KWNS 112215
SEL1
SPC WW 112215
ALZ000-KYZ000-TNZ000-120500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 131
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CDT MON APR 11 2011

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

       NORTHERN ALABAMA
       SOUTHERN AND EASTERN KENTUCKY
       MIDDLE AND EAST TENNESSEE

EFFECTIVE THIS MONDAY AFTERNOON FROM 510 PM UNTIL MIDNIGHT CDT.

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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST NORTHWEST OF
JACKSON KENTUCKY TO 40 MILES SOUTHWEST OF HUNTSVILLE ALABAMA.
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 128...TORNADO WATCH NUMBER 129. WATCH NUMBER 128 129
WILL NOT BE IN EFFECT AFTER 510 PM CDT. CONTINUE...WW 130...

DISCUSSION...TSTMS...INCLUDING A FEW SUSTAINED STORMS/POSSIBLE
SUPERCELLS...EXPECTED TO CONTINUE MOVING NEWD ALONG AND W OF
SLOWLY-PROGRESSIVE SSW-NNE  QLCS IN WRN PART OF WW.  WARM LAYER
ALOFT /PER 18Z JACKSON MS RAOB/ LIKELY HAS KEPT MOST ACTIVITY
SLIGHTLY ELEVATED TO THIS POINT IN TIME.  BUT ARRIVAL OF STRONGER
FORCING FOR ASCENT IN THE FORM OF LEFT EXIT REGION OF SRN PLNS/LWR
MS VLY UPR JET MAY SUPPORT STRONGER...MORE NEARLY SFC-BASED STORMS
THROUGH MID EVE.  GIVEN STRENGTH AND CHARACTER OF WIND PROFILES...
SETUP MAY YIELD LEWPS WITH BOTH DMGG WIND AND POSSIBLE
TORNADOES...IN ADDITION TO MARGINALLY SVR HAIL.

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 450.
MEAN STORM MOTION VECTOR 23045.


...CORFIDI

Tornado Watches in Tennessee, 2011Tornado Watches in Kentucky, 2011Tornado Watches in Alabama, 2011Every tornado watch in 2011

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.