Two rounds of thunderstorms Tuesday, severe threat — TIMELINE

Severe weather likely Monday night and Tuesday southeast of St. Louis

Isolated tornadoes, hail, and heavy rain are expected, with strong wind gusts and damaging straight-line winds. Large hail is also possible, with a small tornado risk.

The Ohio Valley appears to be at the center of the potential for severe storms on Tuesday. Timing puts the storms through the area between 11 p.m. and 2 a.m.

Rain chances will linger into the early morning hours on Wednesday. They have moved up to a Moderate Risk of severe storms and tornadoes (red area on the map) from IN and OH south to northwest Mississippi.

Closer to 5pm, the squall line with damaging winds will move in from southern IL. At this time the threat of severe weather looks less certain, but we will continue to monitor this threat for you over the coming days.

A few lingering showers will be around Wednesday morning, before drier air takes over Wednesday afternoon.

Storms will move through in two rounds Tuesday, but scattered rain could fall through the entire day. Wednesday will be mostly sunny with a high of 53 degrees and a low of 31 degrees. Temperatures have already warmed up into the lower 70s as highs will make a run for the upper 70s by the afternoon.

The severe weather activity stems from a warming air mass in combination with a strong low-pressure system leading to a favorable environment for severe and supercell thunderstorms.

Light snow accumulations will be possible Friday night into Saturday morning.

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