Tornado Watch 540

Issued

Oct 13, 2014, 3:37 PM CDT (20:37 UTC)

Expired

Oct 14, 2014, 12:00 AM CDT

In force

8 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

60 kt

The Northeast Alabama radar (KHTX), 100 km from the middle of the area, began a volume at 20:40 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

70%

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

20%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

95%

• Mesoscale Discussion 1871Oct 13, 12:13 PM CDT
• Mesoscale Discussion 1874Oct 13, 2:22 PM CDT
• Mesoscale Discussion 1879Oct 13, 5:27 PM CDT
• Mesoscale Discussion 1883Oct 13, 7:33 PM CDT
• Mesoscale Discussion 1885Oct 13, 8:57 PM CDT
• Mesoscale Discussion 1886Oct 13, 10:41 PM CDT
• Mesoscale Discussion 1887Oct 13, 11:52 PM CDT

131 
WWUS20 KWNS 132041
SEL0  
SPC WW 132041
ALZ000-TNZ000-140500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 540
NWS STORM PREDICTION CENTER NORMAN OK
340 PM CDT MON OCT 13 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  WESTERN...CENTRAL...AND NORTHERN ALABAMA
  MIDDLE TENNESSEE

* EFFECTIVE THIS MONDAY AFTERNOON FROM 340 PM UNTIL MIDNIGHT CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES LIKELY
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF NASHVILLE
TENNESSEE TO 25 MILES SOUTHWEST OF SELMA ALABAMA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 535...WW 536...WW
537...WW 538...WW 539...

DISCUSSION...SVR WEATHER THREAT EXPECTED TO INCREASE IN WW AREA
THROUGH LATE EVE...BOTH FROM SLOWLY-PROGRESSIVE WRN TN/CNTRL MS
SQLN...AND FROM STORMS FORMING AHEAD OF LINE IN
WEAKLY-CAPPED...MOIST...CONFLUENT LOW-LVL FLOW. LARGE-SCALE ASCENT
AND SSWLY DEEP SHEAR BOTH WILL FURTHER INCREASE OVER THE REGION
AHEAD OF SRN PLNS UPR TROUGH...AND SLY LOW-LVL FLOW WILL CONTINUE.
THESE PROCESSES WILL SOMEWHAT OFFSET MITIGATING FACTORS POSED BY
SUNSET AND BY LOCALIZED STABILIZATION OCCURRING IN WAKE OF CURRENT
TSTMS IN CNTRL AL.

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 500.
MEAN STORM MOTION VECTOR 21040.


...CORFIDI

Tornado Watches in Tennessee, 2014Tornado Watches in Alabama, 2014Every tornado watch in 2014

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.