Severe Thunderstorm Watch 10

Issued

Jan 23, 2012, 2:54 AM EST (07:54 UTC)

Expired

Jan 23, 2012, 5:34 AM EST

In force

3 hr

Issued by

the Storm Prediction Center

Largest hail expected

1 in

Strongest gust expected

65 kt

The Knoxville radar (KMRX), 127 km from the middle of the area, began a volume at 07:57 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

10%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

10%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 55Jan 23, 2:25 AM EST
• Mesoscale Discussion 58Jan 23, 5:28 AM EST

614 
WWUS20 KWNS 230755
SEL0
SPC WW 230755
NCZ000-TNZ000-VAZ000-231500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 10
NWS STORM PREDICTION CENTER NORMAN OK
150 AM CST MON JAN 23 2012

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

       FAR WESTERN NORTH CAROLINA
       MIDDLE AND EASTERN TENNESSEE
       FAR SOUTHWEST VIRGINIA

EFFECTIVE THIS MONDAY MORNING FROM 150 AM UNTIL 900 AM CST.

HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTH OF
KNOXVILLE TENNESSEE TO 10 MILES WEST OF CHATTANOOGA TENNESSEE.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

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.

OTHER WATCH INFORMATION...CONTINUE...WW 7...WW 8...WW 9...

DISCUSSION...PREFRONTAL NE-SW SQLN NOW NEAR BNA...AND COMPLEX AREA
OF SUPERCELLS STORMS FARTHER E/SE...EXPECTED TO CONTINUE GENERALLY
ENEWD INTO E TN LATER THIS MORNING AS REGION IS GLANCED BY STRONG
UPR TROUGH NOW ASSUMING AN INCREASINGLY NEGATIVE TILT OVER W TN/SE
MO.  INTENSE WIND FIELD ASSOCIATED WITH THE VORT SUGGESTS THAT
STORMS WILL CONTINUE TO POSE A RISK OF DMGG SFC WINDS AND POSSIBLY
AN ISOLD TORNADO...DESPITE RESIDUAL LAYER OF STABLE WEDGE-TYPE AIR
THAT SHOULD REMAIN OVER MOST OF THE WW REGION AT THE SFC.
NOTE: EXISTING TORNADO WW 7 WILL BE AREALLY EXTENDED SLIGHTLY EWD TO
INCLUDE THOSE COUNTIES IN MIDDLE TN NOT CURRENTLY UNDER WW 7 AND NOT
INCLUDED IN THIS SVR TSTM WW.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 400. MEAN STORM MOTION
VECTOR 24045.


...CORFIDI

Severe Thunderstorm Watches in Tennessee, 2012Severe Thunderstorm Watches in North Carolina, 2012Severe Thunderstorm Watches in Virginia, 2012Every severe thunderstorm watch in 2012

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.