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    Day 2 Outlook >
Jul 27, 2021 0100 UTC Day 1 Convective Outlook
Updated: Tue Jul 27 00:38:59 UTC 2021 (Print Version | 20210727 0100Z Day 1 shapefile | 20210727 0100Z Day 1 KML)
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 Forecast Discussion
   SPC AC 270038

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0738 PM CDT Mon Jul 26 2021

   Valid 270100Z - 271200Z

   ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
   OF NORTHERN MINNESOTA INTO NORTHWEST WISCONSIN...

   ...SUMMARY...
   Supercells and bowing structures with large hail and damaging winds
   are expected overnight from eastern North Dakota into northern
   Wisconsin.

   ...ND to WI...

   Weak mid-level disturbance appears to be affecting northern MN this
   evening. This feature will track southeast toward northern Lake MI
   overnight with mid-level height rises expected in its wake across
   the upper MS Valley. Several clusters of severe thunderstorms have
   evolved across northern MN and this activity is propagating
   southeast at 30-35kt toward the western portions of Lake
   Superior/northwestern WI. Latest thinking is this convection will
   continue to grow upscale as a reservoir of buoyancy currently
   extends ahead of this activity downstream across northern WI. Severe
   damaging winds and large hail are likely with this evolving complex
   of storms.

   Across eastern ND, strong surface heating allowed temperatures to
   rise well into the 90s to near 100F ahead of the surface low.
   Isolated thunderstorms have developed along the boundary west of JMS
   but updrafts are currently struggling. It's not entirely clear how
   much additional convection will develop along the front, but a very
   unstable air mass does exist across eastern ND/western MN. Any
   storms that mature in this environment may produce damaging
   winds/hail.

   ..Darrow.. 07/27/2021

   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z

        
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Page last modified: July 27, 2021
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