WWUS20 KWNS 140548
SEL4
SPC WW 140548
NDZ000-SDZ000-141300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 434
NWS Storm Prediction Center Norman OK
1250 AM CDT Fri Aug 14 2020

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southern North Dakota
  Extreme north central South Dakota

* Effective this Friday morning from 1250 AM until 800 AM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter likely
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible

SUMMARY...A cluster of severe storms, including bowing segments and
some embedded supercell structures, will persist overnight while
moving eastward over southern North Dakota and adjacent northern
South Dakota.  The storms will be capable of producing damaging
winds and large hail through the early morning hours.

The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 35 miles south of
Dickinson ND to 40 miles south southeast of Jamestown ND. 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 433...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
27040.

...Thompson