SPC Severe Thunderstorm Watch 309

WW 309 SEVERE TSTM ND 092155Z - 100500Z

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 309
NWS Storm Prediction Center Norman OK
455 PM CDT Fri Jun 9 2017

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and Eastern North Dakota

* Effective this Friday afternoon from 455 PM until Midnight CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Thunderstorms are developing over central North Dakota and
are expected to spread eastward into eastern North Dakota this
evening.  Large hail and damaging wind gusts will be possible with
stronger storms.  In addition, an isolated tornado may be possible,
mainly close to the international border.

The severe thunderstorm watch area is approximately along and 95
statute miles east and west of a line from 65 miles north northwest
of Devils Lake ND to 25 miles south southwest of Jamestown ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU9).

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.

&&

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26025.

...Weiss

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