

814 

WWUS20 KWNS 290124

SEL1

SPC WW 290124

INZ000-KYZ000-290600-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 171

NWS Storm Prediction Center Norman OK

825 PM CDT Fri Apr 28 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Southern Indiana

  Northern Kentucky



* Effective this Friday night and Saturday morning from 825 PM

  until 100 AM CDT.



* Primary threats include...

  A few tornadoes possible

  Scattered large hail and isolated very large hail events to 2.5

    inches in diameter possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...Clusters of storms along a surface boundary will likely

retain supercell structures for the next few hours, with an

attendant risk for large hail and damaging winds.  The near-storm

environment is favorable for some tornado risk for the next few

hours with the storms near the Ohio River, within the northern edge

of the warm sector.



The tornado watch area is approximately along and 30 statute miles

north and south of a line from 15 miles west northwest of Evansville

IN to 45 miles east of Louisville KY. For a complete depiction of

the watch see the associated watch outline update (WOUS64 KWNS

WOU1).



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 170...



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 2.5 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 26035.



...Thompson

