Tornado Watch 160

Issued

Apr 19, 2011, 10:14 PM CDT (03:14 UTC)

Expired

Apr 20, 2011, 5:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Memphis radar (KNQA), 121 km from the middle of the area, began a volume at 03:15 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

80%

One or more gusts of 65 knots or more

60%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 482Apr 19, 9:39 PM CDT
• Mesoscale Discussion 485Apr 19, 11:56 PM CDT
• Mesoscale Discussion 486Apr 20, 2:20 AM CDT

806 
WWUS20 KWNS 200315
SEL0  
SPC WW 200315
ARZ000-MSZ000-TNZ000-201000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 160
NWS STORM PREDICTION CENTER NORMAN OK
1015 PM CDT TUE APR 19 2011

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

       EXTREME SOUTHEAST ARKANSAS
       NORTHERN MISSISSIPPI
       WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 1015 PM
UNTIL 500 AM CDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH NORTHWEST OF
NASHVILLE TENNESSEE TO 10 MILES WEST SOUTHWEST OF GREENWOOD
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

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 157...WW 158...WW 159...

DISCUSSION...SCATTERED SEVERE STORMS IN AR ARE CONGEALING INTO
ANOTHER LINEAR CLUSTER...WITH A DEVELOPING BOW ECHO A LITTLE W OF
MEMPHIS.  THIS CONVECTION WILL CONTINUE TO SURGE EWD INTO NRN MS AND
WRN/MIDDLE TN OVERNIGHT...WITH STRONG ASCENT ALONG THE LEADING EDGE
OF THE GUST FRONTS MAINTAINING THE CONVECTION...DESPITE A GRADUAL
INCREASE IN CONVECTIVE INHIBITION.  DAMAGING WINDS CAN BE EXPECTED
WITH THE BOWING SEGMENTS...AND THE STRONGER UPDRAFTS WILL CONTINUE
TO POSE A RISK FOR LARGE HAIL.  A COUPLE OF TORNADOES WILL ALSO BE
POSSIBLE WITH EMBEDDED CIRCULATIONS IN THE LINE...GIVEN THE MOIST
BOUNDARY LAYER AND THE STRONG LOW-LEVEL SHEAR.

AVIATION...TORNADOES AND 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 27045.


...THOMPSON

Tornado Watches in Tennessee, 2011Tornado Watches in Mississippi, 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.