SPC Oct 12, 2017 0600 UTC Day 2 Convective Outlook

By Newsroom America Feeds at 12 Oct 2017

SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1256 AM CDT Thu Oct 12 2017 Valid 131200Z - 141200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL PLAINS INTO THE LOWER TO MID MISSOURI VALLEY... ...SUMMARY... A marginal threat for hail will be possible Friday night across parts of the central Plains into the lower to mid Missouri Valley. ...Central Plains/Lower to Mid Missouri Valley... An upper-level trough will move across the Intermountain West from Friday into Friday night. Ahead of the trough, flow will be west-southwesterly from the Southern Rockies to the Great Lakes. At the surface, a corridor of low-level moisture is forecast to be in place from the southern Plains into the lower Missouri Valley where low-level flow will strengthen Friday night. This will provide support for scattered thunderstorm development after 06Z Friday night. NAM forecast soundings at that time in central and northeast Kansas show instability mostly above the 850 mb level with MUCAPE values in the 1500 to 2000 J/kg range. In addition, effective shear is forecast to be 40 to 50 kt with steep mid-level lapse rates. This may be enough for a marginal hail threat with elevated storms during the overnight period. ..Broyles.. 10/12/2017 Read more



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