U.S. Severe Weather Forecast (Convective Outlook)

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Day Three

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Storm Prediction Center ac 260721 


Day 3 convective outlook 
National Weather Service Storm Prediction Center Norman OK 
0221 am CDT Tue Sep 26 2017 


Valid 281200z - 291200z 


..no severe thunderstorm areas forecast... 


... 
severe thunderstorms are not expected across the U.S. On Thursday. 


... 
Northern-stream upper troughing is progged to persist across eastern 
Canada and the Great Lakes/northeast Thursday, shifting gradually 
eastward/southeastward with time. Meanwhile farther west, troughing 
over The Rockies -- drifting slowly northeastward -- is expected to 
weaken with time while ridging persists over the south-central 
states through the period. 


At the surface, a cold front -- shifting off the New England and 
mid-Atlantic coasts at the start of the period, will progress 
southeastward across the southern states, leaving a large area of 
high pressure in its wake to cover the majority of the U.S. By the 
end of the period. 


Along with potential for showers and a few thunderstorms ahead of 
the slowly advancing southern/eastern U.S. Cold front, afternoon 
showers and isolated thunderstorms are also expected across portions 
of The Four Corners states and vicinity near the weakening upper 
low/trough. Finally, showers -- and perhaps a few thunderstorms -- 
are expected over the upper Great Lakes region, mainly during the 
second half of the period. In all areas, risk for severe storms 
appears to be minimal. 


.Goss.. 09/26/2017 


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