

287 

WWUS20 KWNS 271908

SEL4

SPC WW 271908

MTZ000-280200-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 454

NWS Storm Prediction Center Norman OK

110 PM MDT Thu Jun 27 2019



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  Central Montana



* Effective this Thursday afternoon and evening from 110 PM until

  800 PM MDT.



* Primary threats include...

  Widespread large hail and scattered very large hail events to 3

    inches in diameter likely

  Scattered damaging wind gusts to 70 mph likely

  A tornado or two possible



SUMMARY...Intense thunderstorm development is expected this

afternoon over parts of central Montana, with supercells capable of

very large hail and damaging wind gusts.  A tornado or two is also

possible this evening in the eastern half of the watch area.



The severe thunderstorm watch area is approximately along and 95

statute miles east and west of a line from 50 miles southeast of

Helena MT to 35 miles west northwest of Havre MT. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU4).



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 453...



AVIATION...A few severe thunderstorms with hail surface and aloft to

3 inches. Extreme turbulence and surface wind gusts to 60 knots. A

few cumulonimbi with maximum tops to 500. Mean storm motion vector

25035.



...Hart

