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Severe Thunderstorm Watch 278
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WW0278 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
Moderate Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL8

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 278
   NWS Storm Prediction Center Norman OK
   1000 PM CDT Thu Jun 17 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     North-central/Northeast Iowa
     Southeast Minnesota
     Central/Southern Wisconsin

   * Effective this Thursday night and Friday morning from 1000 PM
     until 400 AM CDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph likely
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible
     A tornado or two possible

   SUMMARY...Organized clusters of storms are expected to accelerate
   east-southeastward across central/southern Wisconsin, while
   additional storms develop across southeast Minnesota and northern
   Iowa late this evening into the overnight. Damaging winds and severe
   hail can be expected through at least the early/middle part of the
   overnight.

   The severe thunderstorm watch area is approximately along and 70
   statute miles north and south of a line from 35 miles north
   northwest of Mason City IA to 35 miles north of Milwaukee WI. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU8).

   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 276...WW 277...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 600. Mean storm motion vector
   29040.

   ...Guyer
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Page last modified: June 18, 2021
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