SPC 1730Z Day 2 Outlook

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1150 AM CDT Tue Oct 13 2020

Valid 141200Z - 151200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are unlikely across the contiguous United States on
Wednesday.

...Synopsis...
A substantial positive-tilt upper trough will move across the
northern Plains toward the Great Lakes Wednesday, with strong winds
aloft and tight midlevel temperature gradient extending westward
across the central Plains and into northern Rockies. At the surface,
low pressure will deepen slightly as it moves from North Dakota
toward lake Superior during the day. A cold front will trail
southwestward from the low into the central Plains, while a dryline
develops over western Texas and southwest Oklahoma.

Given high pressure in place over the eastern states, moisture
return ahead of this system will be meager, with little instability
forecast to support thunderstorms. Dewpoints near 60 F may
eventually reach I-35 in Oklahoma, with a narrow band of 50s F ahead
of the cold front from Kansas into Missouri. However, forecast
soundings indicate capping will exist along the dryline, and most of
the cold front. In addition, midlevel lapse rates will be poor south
of the mid/upper jet.

..Jewell.. 10/13/2020

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