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Storm Prediction Center Tornado Watch 563


Note: 
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.

Note: Click for Watch Status Reports.

   SEL3

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Tornado Watch Number 563
   NWS Storm Prediction Center Norman OK
   120 PM CST Wed Dec 15 2021

   The NWS Storm Prediction Center has issued a

   * Tornado Watch for portions of 
     Western and central Iowa
     Northeastern Kansas
     South central Minnesota
     Northwestern Missouri
     Easterm Nebraska
     Extreme southeastern South Dakota

   * Effective this Wednesday afternoon and evening from 120 PM
     until 800 PM CST.

   * Primary threats include...
     A few tornadoes likely with a couple intense tornadoes possible
     Widespread damaging winds and isolated significant gusts to 90
       mph likely
     Isolated large hail events to 1 inch in diameter possible

   SUMMARY...A developing squall line will move rapidly northeastward
   from northern Kansas and Nebraska across Iowa and adjacent areas of
   Minnesota and Missouri through this evening.  Widespread damaging
   winds are expected, with peak gusts near 90 mph possible.  A mix of
   embedded supercells and smaller-scale circulations in the line will
   also pose a threat for tornadoes, with a strong tornado or two
   possible.

   The tornado watch area is approximately along and 110 statute miles
   north and south of a line from 15 miles southwest of Hastings NE to
   50 miles south southeast of Mason City IA. For a complete depiction
   of the watch see the associated watch outline update (WOUS64 KWNS
   WOU3).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Tornado Watch means conditions are favorable for
   tornadoes and 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.

   &&

   AVIATION...Tornadoes and a few severe thunderstorms with hail
   surface and aloft to 1 inch. Extreme turbulence and surface wind
   gusts to 80 knots. A few cumulonimbi with maximum tops to 450. Mean
   storm motion vector 23060.

   ...Thompson