Severe Thunderstorm Watch 252

Issued

Jun 7, 2014, 2:44 PM CDT (19:44 UTC)

Expired

Jun 7, 2014, 9:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Memphis radar (KNQA), 115 km from the middle of the area, began a volume at 19:43 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

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

50%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

50%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

60%

• Mesoscale Discussion 877Jun 7, 12:25 PM CDT
• Mesoscale Discussion 878Jun 7, 1:06 PM CDT
• Mesoscale Discussion 881Jun 7, 3:12 PM CDT
• Mesoscale Discussion 885Jun 7, 6:32 PM CDT

006 
WWUS20 KWNS 071947
SEL2  
SPC WW 071947
ARZ000-KYZ000-MOZ000-TNZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 252
NWS STORM PREDICTION CENTER NORMAN OK
245 PM CDT SAT JUN 7 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  NORTHERN AND CENTRAL ARKANSAS
  SOUTHWEST KENTUCKY
  SOUTHEAST MISSOURI
  WESTERN AND MIDDLE TENNESSEE

* EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 245 PM UNTIL
  900 PM CDT.

* PRIMARY THREATS INCLUDE...
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
    INCHES IN DIAMETER POSSIBLE
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
  A TORNADO OR TWO POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES WEST
NORTHWEST OF RUSSELLVILLE ARKANSAS TO 20 MILES SOUTHEAST OF
CLARKSVILLE TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

&&

DISCUSSION...STORMS ARE INTENSIFYING IN A BAND FROM SERN MO INTO
WEST CENTRAL AR WITHIN A DEEP LAYER OF STRONGER SWLY FLOW ALOFT TO
THE SOUTH OF AN MCV MOVING EWD ACROSS MO.  THE ENVIRONMENT HAS
BECOME UNSTABLE WITH MLCAPE TO 2500 J/KG AS STRONG DIABATIC HEATING
HAS OCCURRED INTO AR AND THE MID-SOUTH THROUGH THE AFTERNOON. 
STRONGER CELLS WILL HAVE POTENTIAL TO PRODUCE PRIMARILY LARGE HAIL
AND DAMAGING WIND GUSTS AS THEY MOVE EWD 25-30 KT....ALTHOUGH A
BRIEF TORNADO OVER FAR NERN AR/SERN MO AND EXTREME SWRN KY/NWRN TN
MAY ALSO BE POSSIBLE.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 25030.


...WEISS

Severe Thunderstorm Watches in Arkansas, 2014Severe Thunderstorm Watches in Tennessee, 2014Severe Thunderstorm Watches in Kentucky, 2014Every severe thunderstorm 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.