Day 1 Severe Weather Outlook

Valid 170100Z – 171200Z


Severe risk will remain limited overnight.

…01z Update…

Adjustments to the general thunderstorm lines have been made based
on latest observations and trends. The biggest change is the removal
of thunder altogether across the lower Ohio Valley. Otherwise,
thunderstorms will remain possible along the TX and LA Gulf Coasts
as thunderstorms associated with a weak low continue to shift
westward overnight. Additional isolated to widely scattered
thunderstorms associated with the upper shortwave trough moving
across into the Great Basin will continue through the overnight
hours. Some strong gusts could occur across parts of the Great Basin
given the strong background flow over the region, but convection
itself should remain weak. Additional thunderstorms will develop in
warm advection regime as a shortwave impulse/MCV lifts northeast
across the eastern Dakotas/Upper Midwest.

..Leitman.. 09/17/2019


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