SPC Severe Thunderstorm Watch 461

WW 461 SEVERE TSTM ND SD 280320Z - 281000Z

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 461
NWS Storm Prediction Center Norman OK
1020 PM CDT Thu Aug 27 2020

The NWS Storm Prediction Center has issued a

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

* Effective this Thursday night and Friday morning from 1020 PM
  until 500 AM CDT.

* Primary threats include...
  Scattered damaging winds likely with isolated significant gusts
    to 80 mph possible
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  A tornado or two possible

SUMMARY...Storms over western South Dakota at mid/late evening are
expected to organize and accelerate eastward through the late
evening and overnight hours with an increasing risk for wind damage
and wind-driven hail across central into eastern South Dakota, and
possibly southern North Dakota.

The severe thunderstorm watch area is approximately along and 105
statute miles north and south of a line from 20 miles north of
Pierre SD to 30 miles north northeast of Brookings SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).

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 460...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
28040.

...Guyer

Read more

from SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0461.html