SPC Severe Thunderstorm Watch 340



WW 340 SEVERE TSTM MT SD WY 072145Z – 080400Z

WW 0340 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 340
NWS Storm Prediction Center Norman OK
445 PM CDT Fri Jun 7 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Far southeast Montana
  Western South Dakota
  Northeast Wyoming

* Effective this Friday afternoon and evening from 445 PM until
  1100 PM CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph possible
  Scattered large hail and isolated very large hail events to 2.5
    inches in diameter possible

SUMMARY...Multiple discrete storms are expected to develop and more
northeast  off the Bighorns and Black Hills this evening. Large hail
and severe wind gusts are possible.

The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 55 miles south southwest
of Rapid City SD to 60 miles northwest of Buffalo SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).

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 339...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
23035.

...Grams

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