SPC Severe Thunderstorm Watch 556



WW 556 SEVERE TSTM ND SD 061950Z – 070400Z

WW 0556 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 556
NWS Storm Prediction Center Norman OK
250 PM CDT Tue Aug 6 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  central and southern North Dakota
  northern South Dakota

* Effective this Tuesday afternoon and evening from 250 PM until
  1100 PM CDT.

* Primary threats include...
  Scattered large hail likely with isolated very large hail events
    to 2.5 inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible
  A tornado or two possible

SUMMARY...Severe storms are expected to increase in coverage this
afternoon and continue into the evening. Initial primary threat will
be supercells with large to very large hail and downburst winds,
though a brief tornado cannot be ruled out. Threat will transition
to damaging wind as storms develop southeast into South Dakota this
evening.

The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 15 miles east northeast
of Garrison ND to 75 miles south southwest of Aberdeen SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).

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 555...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
31035.

...Dial

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