U.S. Severe Weather Forecast (Convective Outlook)

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Storm Prediction Center ac 240526 


Day 2 convective outlook 
National Weather Service Storm Prediction Center Norman OK 
1226 am CDT sun Sep 24 2017 


Valid 251200z - 261200z 


..no severe thunderstorm areas forecast... 


... 
scattered showers and storms are expected in portions of the 
southern Great Plains. The severe risk with this activity is 
expected to be minimal. 


... 
A persistent longwave trough will remain across the west while 
making slow eastward progress into the Dakotas. Downstream, 
meridionally oriented mid-level flow will remain in place from the 
southern High Plains northward to Minnesota and vicinity - although 
this flow should be weaker relative to past days. Ridging will also 
remain located across the northeast. 


At the surface, a slow-moving cold front will advance southward 
across the plains and extend from northeastern New Mexico 
northeastward to western Wisconsin by early evening. Southerly flow 
ahead of this front will maintain 60s f dewpoints, while convergence 
Fosters an arc of convection from The Big Bend areas of Texas 
northward into western Oklahoma and into Iowa. 


Although surface heating ahead/away from ongoing convection may 
Foster weak destabilization during peak heating hours, weak 
mid-level lapse rates and modest vertical shear should result in any 
damaging wind threat being too sparse to merit severe probabilities 
at this time. 


.Cook.. 09/24/2017 


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