Severe Weather Threat Day 1 Sun Aug 25

Nrn-Nern Sd/Sern Nd...Central Mn...Nrn Wi/Part Of Upper Mi...

Tstms Developed Late This Afternoon To The Early Evening Over Nwrn Into North Central Sd And Over North Central Mn. Weak Midlevel
Impulses Tracking Ewd Through The Nrn Extent Of A Large High
Centered Over Mo This Evening Appear To Be Providing Sufficient Deep Layer Ascent And Weakening Of Some Inhibition/Cap That Was Still Present On The 00z Soundings At Bis/Abr/Mpx.

A Strengthening Swly Llj Into Srn/Central Mn This Forecast Period Will Support An Increase In Low Level Waa...And When Combined With Ascent With The Two Aforementioned Midlevel Impulses May Prove Sufficient For Additional Storm Development. An Increase In Deep Layer Shear Across The Slight Risk Area To 30-40 Kt And Residual Moderate To Strong Instability Will Support At Least Isolated Severe Storms This Evening...With Models Suggesting One Or Two Clusters Of Storms Yet Later This Evening.

For These Reasons/Factors...The Slight Risk Area Has Been Expanded Wwd Into Nern Sd And Far Sern Nd And Also To Include More Of East Central Mn And Wrn/Central Upper Mi.

Pacific Nw...

A Shortwave Trough...Currently Moving Nnewd Through Central/Nrn Ore Per Satellite Imagery...Will Progress Nnewd Through Wa And Nrn Id By 12z Monday. Although Ascent With This Feature May Support
Additional Convection Along Its Path...A More Stable Environment
Located Over Central Wa And Eventual Boundary Layer Cooling/
Stabilization Should Support A Further Diminishing Trend In Stronger
Tstm Development.

Thus...The Overall Severe Weather Threat Is Expected To Be Less Than 5 Percent.


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