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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