Severe storms possible Saturday evening


Decatur, Ill. (WAND-TV) SATURDAY FORECAST UPDATE: Storms across the central Plains Friday evening will slide into central Illinois by Saturday morning. Storms are expected to diminish in strength as they arrive across the area. The Storm Prediction Center has a 1-Marginal Risk (Green) from Bloomington to Decatur to Vandalia west in place. The greatest risk for severe storms late Friday night into Saturday morning will be to our west.

A break in the action is expected into Saturday afternoon with hot and muggy conditions. An isolated storm can’t be ruled out Saturday afternoon with main line of storms set to arrive in the evening. We will be watching closely to see what impacts morning or afternoon storms could have on the atomsphere. If we don't see much develop in the afternoon, then evening storms would have a very unstable environment to work with. Still some uncertainty with respect to this forecast. Storms are expected to fire across Missouri and Iowa and form into a squall line as the approach. The SPC has a 3-Enhanced Risk (Orange) in place from Champaign to Decatur to Springfield northwest and a 2-Slight Risk (Yellow) from I-72 to I-70.

Timing: Storms fire northwest of the Illinois River between 7 to 8 PM and approach the I-55 corridor, Lincoln to Springfield to Carlinville by 10 to 11 PM. Watseka to Decatur to Taylorville can expect storms by 11 PM to Midnight and then east of I-57 by 1 to 2 AM. Severe threat expected to diminish by 2 AM as storms push off into Indiana. Forecast models are still showing some disagreement with respect to timing of the line pushing through. We will be working out some of these finer details with the next couple of model runs. 

Main Threats: Damaging Winds and Hail. Tornado threat looks to be low.

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