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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 677
NWS Storm Prediction Center Norman OK
210 PM CDT Thu Sep 19 2024

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern Iowa
  Southern and East-Central Minnesota
  Western Wisconsin

* Effective this Thursday afternoon and evening from 210 PM until
  1000 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...Thunderstorms should continue to develop this afternoon
while posing a threat for large hail up to 1.5-2.5 inches in
diameter. As this activity spreads east-northeastward, damaging
winds around 60-70 mph may beco*e more of a threat through this
evening, especially if thunderstorms can form into clusters. A
tornado or two also appears possible with any persistent,
surface-based supercell.

The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 45 miles north northwest
of Eau Claire WI to 15 miles southwest of Mason City IA. For a
co*plete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).

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
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.

...Gleason