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Severe Thunderstorm Watch 419
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WW0419 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 419
   NWS Storm Prediction Center Norman OK
   205 PM CDT Tue Aug 10 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Eastern Iowa
     A small part of northwestern Illinois
     Southwestern Wisconsin

   * Effective this Tuesday afternoon and evening from 205 PM until
     800 PM CDT.

   * Primary threats include...
     Scattered damaging winds and isolated significant gusts to 75
       mph likely
     Scattered large hail events to 1.5 inches in diameter possible

   SUMMARY...Thunderstorms are forming across parts of central and
   northeastern Iowa, and these storms have the potential to increase
   in both coverage and intensity through the afternoon.  The storm
   environment appears favorable for storm clusters capable of
   producing isolated significant severe outflow gusts to 75 mph and
   isolated large hail.

   The severe thunderstorm watch area is approximately along and 50
   statute miles east and west of a line from 80 miles north northwest
   of Dubuque IA to 20 miles west southwest of Burlington IA. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).

   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
   1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 600. Mean storm motion vector
   27025.

   ...Thompson
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