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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 256
NWS Storm Prediction Center Norman OK
215 AM CDT Fri Jun 11 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme northeastern Nebraska
Eastern South Dakota
* Effective this Friday morning from 215 AM until 700 AM CDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...A squall line across central South Dakota will move
eastward through the early morning hours. Occasional damaging gusts
and isolated, marginally severe hail will be possible with the
stronger storms in the line. The severe threat should diminish
before sunrise, except for areas near the Missouri River in extreme
southeast South Dakota and northeast Nebraska.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 35 miles north of
Aberdeen SD to 55 miles south of Mitchell SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).
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
OTHER WATCH INFORMATION...CONTINUE...WW 253...WW 254...WW 255...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 500. Mean storm motion vector