Storm Prediction Center Severe Thunderstorm Watch 641

Note: 
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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   SEL1

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 641
   NWS Storm Prediction Center Norman OK
   1245 AM CDT Wed Sep 2 2026

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Southeast Minnesota
     Western and Central Wisconsin

   * Effective this Wednesday morning from 1245 AM until 600 AM CDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph likely
     Scattered large hail events to 1.5 inches in diameter possible

   SUMMARY...A cluster of intense thunderstorms over southern Minnesota
   will track eastward into Wisconsin overnight.  These storms will
   pose occasional risks of severe wind gusts and large hail.

   The severe thunderstorm watch area is approximately along and 40
   statute miles north and south of a line from 25 miles west of
   Rochester MN to 65 miles east northeast of Camp Douglas WI. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU1).

   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 640...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   26035.

   ...Hart

Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.

   SAW1 
   WW 641 SEVERE TSTM MN WI 020545Z - 021100Z
   AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
   25W RST/ROCHESTER MN/ - 65ENE VOK/CAMP DOUGLAS WI/
   ..AVIATION COORDS.. 35NM N/S /52NNE MCW - 41WSW GRB/
   HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26035.

   LAT...LON 44509300 44868906 43708906 43349300

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU1.

Watch 641 Status Report Message has not been issued yet.

Note:
 Click for Complete Product Text.

Tornadoes

Wind

Hail

Combined Severe Hail/Wind

For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The “Low” category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
“Moderate” from 30% to 60%, and “High” from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.