URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 578
NWS Storm Prediction Center Norman OK
350 PM CDT Tue Aug 1 2023

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northwest Minnesota
  Extreme northeast Montana
  North Dakota

* Effective this Tuesday afternoon from 350 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

SUMMARY...Widely scattered thunderstorm development is expected this
afternoon from northwest Minnesota westward across North Dakota,
where the environment will favor splitting supercells capable of
producing large hail and damaging winds.  Additional storm
development is expected near the Montana/North Dakota border, with
the potential for these storms to grow into a cluster with damaging
winds while moving east-southeastward through early tonight.

The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 65 miles south
southwest of Williston ND to 25 miles northeast of Detroit Lakes MN.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU8).

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 550. Mean storm motion vector
30020.

...Thompson