SPC AC 270600

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0100 AM CDT Thu Aug 27 2020

   Valid 281200Z - 291200Z

   ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM A PORTION
   OF EASTERN IOWA INTO SOUTHERN WISCONSIN AND NORTHERN ILLINOIS...

   ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE UPPER
   MISSISSIPPI VALLEY INTO THE GREAT LAKES AND OHIO VALLEY AS WELL AS
   THE TENNESSEE VALLEY...

   ...SUMMARY...
   Strong to severe storms are possible Friday from a portion of the
   upper Mississippi Valley, Great Lakes and Ohio Valley with large
   hail and damaging wind the main threats. Other severe storms may
   occur across the TN Valley region with a few tornadoes and damaging
   wind the primary threats.

   ...Middle Mississippi Valley through the Great Lakes and Ohio
   Valley...

   East-west quasi-stationary front will stretch across the Great
   Lakes into southern portions of the Northeast States early Friday.
   Elevated storms will be ongoing within zone of isentropic
   ascent north of this boundary. Rich low-level moisture with upper
   60s to low 70s F dewpoints will reside in the warm sector farther
   south. The atmosphere will likely become moderately to strongly
   unstable as the boundary layer warms during the afternoon with
   MLCAPE from 2000-3000 J/kg MLCAPE likely. A southeast-advancing cold
   front will accompany a progressive northern-stream trough through
   the upper MS Valley during the afternoon, continuing into the
   Midwest during the evening. Additional storms will likely develop as
   the front interacts with the destabilizing boundary layer from
   southern WI into IA, and this activity will subsequently spread
   southeast. Vertical wind profiles will strengthen as the upper
   trough advances east-southeast, and potential will exist for
   organized storms including a few supercells as well as lines with
   bowing segments. Damaging wind and hail should be the main threats.

   ...Tennessee and Kentucky...

   The remnants of Hurricane Laura should be located over northeast
   Arkansas by 12Z Friday based on the latest forecast track from the
   National Hurricane Center. This feature is forecast to advance east
   northeast during the period through western TN and KY as it begins
   to interact with the southern fringe of the mid-latitude westerlies.
   The kinematic environment associated with the remnants of Laura
   should remain favorable for a few tornadoes, especially during the
   afternoon when the boundary layer will have the potential to be more
   unstable. However, the threat may continue into the overnight across
   portions of TN and KY as the system continues east.

   ...Central Plains...

   It still appears more substantial thunderstorm initiation along the
   cold front will probably remain limited across the central Plains
   during the afternoon. A greater signal exists in the upslope region
   of CO where storms will likely develop over the higher terrain later
   in the day. This activity will spread east possibly reaching the
   central High Plains, posing a risk for a few damaging wind gusts and
   hail during the evening. Additional storms may develop overnight
   across KS, mainly north of the front, and some of this activity may
   become capable of producing hail and locally strong wind gusts.

   ..Dial.. 08/27/2020

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   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z