SPC Severe Thunderstorm Watch 470

WW 470 SEVERE TSTM IA NE SD 280330Z – 280800Z

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 470
NWS Storm Prediction Center Norman OK
1030 PM CDT Fri Jun 27 2025

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northwest Iowa
  Northeast Nebraska
  Southeast South Dakota

* Effective this Friday night and Saturday morning from 1030 PM
  until 300 AM CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 80
    mph possible
  Isolated very large hail events to 2 inches in diameter possible

SUMMARY...A well-organized/intense cluster of storms with a history
of severe-caliber winds will continue southeastward late this
evening into the early overnight. See Mesoscale Discussion 1483 for
more short-term details.

The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 40 miles south of
Mitchell SD to 55 miles east northeast of Sioux City IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).

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 467...WW 468...WW 469...

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
30030.

...Guyer

Read more