SPC Severe Thunderstorm Watch 332



WW 332 SEVERE TSTM MT SD WY 052215Z – 060500Z

WW 0332 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 332
NWS Storm Prediction Center Norman OK
415 PM MDT Sun Jul 5 2020

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Extreme southeastern Montana
  Western South Dakota
  Northeastern Wyoming

* Effective this Sunday afternoon and evening from 415 PM until
  1100 PM MDT.

* 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 clusters of storms will form and spread
east-northeastward from Wyoming across western South Dakota through
early tonight.  The storm environment is favorable for supercells
with isolated very large hail, though storm mergers/upscale growth
will likely lead to a larger storm cluster with damaging winds later
this evening.

The severe thunderstorm watch area is approximately along and 85
statute miles north and south of a line from 60 miles north of
Casper WY to 60 miles north northeast of Philip SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2).

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 331...

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 550. Mean storm motion vector
26025.

...Thompson

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