SPC 0600Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1245 AM CDT Tue Oct 20 2020

Valid 211200Z - 221200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
No severe thunderstorms are expected across the continental United
States on Wednesday or Wednesday night.

...DISCUSSION...
Southwest mid-level flow will become established from the High
Plains to the Great Lakes from Wednesday into Wednesday night as an
upper-level trough moves across the western U.S. At the surface,
moisture advection will take place across the central Plains and mid
to upper Mississippi Valley as a low deepens in the central High
Plains. Thunderstorms will be possible Wednesday evening into the
overnight period along the northern edge of the moist sector as the
low-level jet strengthens, from Kansas east-northeastward into Iowa
and northern Illinois. Instability is forecast to be weak along this
corridor and unfavorable for a severe threat. Isolated thunderstorms
may also develop on Wednesday across in the Gulf Coast States and
Carolinas, where weak deep-layer shear will negate the potential for
a severe threat. A few non-severe storms may also occur in the lower
Great Lakes region on Wednesday.

..Broyles.. 10/20/2020

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