Severe Thunderstorm Watch 301

Issued

Jun 21, 2021, 12:52 PM CDT (17:52 UTC)

Expired

Jun 21, 2021, 6:18 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Louisville radar (KLVX), 108 km from the middle of the area, began a volume at 17:54 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

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

40%

One or more gusts of 65 knots or more

20%

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

70%

• Mesoscale Discussion 1047 Severe potential...watch possibleJun 21, 11:35 AM CDT
• Mesoscale Discussion 1051 Severe thunderstorm watch 301Jun 21, 3:03 PM CDT

507 
WWUS20 KWNS 211749
SEL1  
SPC WW 211749
KYZ000-TNZ000-220100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 301
NWS Storm Prediction Center Norman OK
1250 PM CDT Mon Jun 21 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and Eastern Kentucky
  Middle Tennessee

* Effective this Monday afternoon and evening from 1250 PM until
  800 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Scattered large hail events to 1.5 inches in diameter possible

SUMMARY...Scattered thunderstorms have developed across parts of
KY/TN.  The strongest cells will pose an occasional risk of damaging
wind gusts and perhaps hail through the afternoon.

The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 25 miles south
southwest of Clarksville TN to 45 miles east northeast of Jackson
KY. For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU1).

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 299...WW 300...

AVIATION...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
27025.

...Hart

Severe Thunderstorm Watches in Kentucky, 2021Severe Thunderstorm Watches in Tennessee, 2021Every severe thunderstorm watch in 2021

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.