Tornado Watch 112

Issued

Apr 2, 2009, 6:02 PM CDT (23:02 UTC)

Expired

Apr 3, 2009, 1:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Northeast Alabama radar (KHTX), 49 km from the middle of the area, began a volume at 23:04 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

60%

One or more EF2 to EF5 tornadoes

40%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

60%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 371Apr 2, 2:04 PM CDT
• Mesoscale Discussion 373Apr 2, 3:42 PM CDT
• Mesoscale Discussion 374Apr 2, 4:35 PM CDT
• Mesoscale Discussion 375Apr 2, 5:25 PM CDT
• Mesoscale Discussion 379Apr 2, 9:15 PM CDT
• Mesoscale Discussion 380Apr 2, 10:00 PM CDT
• Mesoscale Discussion 382Apr 2, 11:50 PM CDT

451 
WWUS20 KWNS 022300
SEL2  
SPC WW 022300
ALZ000-GAZ000-TNZ000-030700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 112
NWS STORM PREDICTION CENTER NORMAN OK
600 PM CDT THU APR 2 2009

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

       NORTHERN AND CENTRAL ALABAMA
       NORTHWEST GEORGIA
       MIDDLE AND EAST TENNESSEE

EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 600 PM
UNTIL 200 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 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF
CROSSVILLE TENNESSEE TO 10 MILES SOUTH OF SELMA ALABAMA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

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 107. WATCH NUMBER 107 WILL NOT BE IN EFFECT AFTER
600 PM CDT. CONTINUE...WW 108...WW 109...WW 110...WW 111...

DISCUSSION...EXISTING BROKEN BAND OF TSTMS FM NE AL NWD INTO MIDDLE
TN EXPECTED TO CONTINUE ENEWD...WHILE ADDITIONAL
DEVELOPMENT/STRENGTHENING OCCURS ALONG BAND JUST ENTERING WRN AL. 
INCREASING SHEAR AND ASCENT DOWNSTREAM FROM AR UPR VORT...ALONG WITH
MODERATELY MOIST LOW LVL INFLOW...WILL SUPPORT CONTINUED RISK FOR
ELONGATED/QUASI-DISCRETE SUPERCELLS WITH A THREAT FOR TORNADOES...IN
ADDITION TO SVR HAIL/WIND.

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
500. MEAN STORM MOTION VECTOR 23040.


...CORFIDI

Tornado Watches in Tennessee, 2009Tornado Watches in Alabama, 2009Tornado Watches in Georgia, 2009Every tornado watch in 2009

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.