Mon-Tue, Sept 20-21st Severe T'Storm Episode Update #1

(11:45AM - 9/20/21) A storm system moving through the region will bring severe t'storm potential to portions of the state, this evening through Tuesday morning.

Summary...
A storm system moved through the Plains and into the Midwest Sunday night into this morning, and will push through the Midwest and Great Lakes this afternoon through Tuesday. This storm system will bring severe t'storm potential to portions of the state, this evening through early Tuesday morning.

​​Forecast...
Monday Evening - Tuesday Morning, Sept 20-21st...
As a storm system moves through the Midwest and Great Lakes today into Tuesday, a cold front will sweep eastward across the state, from this evening through Tuesday morning. Scattered showers and t'storms are expected to develop this afternoon along this cold front across portions of Southern Minnesota, Iowa and Northern Missouri. This activity will then move eastward and across a large portion of the state, from this evening into Tuesday morning. An environment favorable for some severe t'storm potential will be in place across a large portion of the state ahead of this activity. This environment will feature low instability of 500-2,000J/KG, dew points in the low 60's to low 70's, modest, good forcing, and modest lapse rates of 5.5-7.0C. This environment will be supportive of upwards of an isolated severe t'storm risk (level 1) across a large portion of the state. Damaging winds and hail will be the severe weather threats, though an isolated tornado can't be ruled out.

​Below are the severe t'storm forecast for this event.

JP