000
WWUS20 KWNS 072017
SEL1
SPC WW 072017
MNZ000-NDZ000-SDZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 471
NWS Storm Prediction Center Norman OK
320 PM CDT Wed Sep 7 2016

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
  West Central Minnesota
  Southeast North Dakota
  Northeast South Dakota

* Effective this Wednesday afternoon and evening from 320 PM
  until 900 PM 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 developing over central ND/SD will track
eastward across the watch area this afternoon and early evening. A
few of the storms may be capable of large hail and damaging wind
gusts.  An isolated tornado is also possible.

The severe thunderstorm watch area is approximately along and 95
statute miles east and west of a line from 50 miles north of Fargo
ND to 40 miles west southwest of Watertown 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.

&&

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 26035.

...Hart