Extreme meteorologist Dr. Reed Timmer explains how severe storms could lead to dangerous overnight tornadoes in Illinois and surrounding areas.
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00:00 Tornado potential is increasing across northern Illinois this late afternoon
00:05 into the evening hours and the Storm Prediction Center has increased the
00:08 probabilities across northwestern Illinois just to the north of Champaign
00:12 from Kankakee all the way to just east of Davenport, Iowa almost up to the
00:16 Chicago area and a tornado watch is certainly coming. We have strong
00:20 southeasterly winds here to the east of a bulging dry line and that dry line is
00:25 bulging through central Illinois right now moving toward this location behind
00:29 the dry line dew points drop into the 40s and even the 30s winds are gusting
00:33 out of the southwest. Here on the moist side of the dry line though we have
00:36 southeasterly winds and that convergence along that frontal boundary is what
00:40 could initiate storms over the next couple of hours here across northern
00:43 Illinois and there's a lot of low-level wind shear in place which could even
00:47 support the threat of a strong tornado or two here across central and northern
00:51 Illinois pushing into northwestern Indiana and then the night show begins
00:54 overnight tonight. We expect explosive development of supercell storms about
00:58 8, 9, 10 p.m. across far southern Illinois. Those are going to track along the Ohio
01:03 River Valley through southern Indiana eventually into far southwestern Ohio by
01:08 the early morning hours on Wednesday but we're likely about to have the beginning
01:12 of a severe weather outbreak. It's going to peak this evening and in the
01:15 overnight hours tonight probably even through the midnight hour so it's very
01:18 important to keep those weather radios charged up turned on overnight tonight.
01:22 Stay tuned to that incoming severe weather because it could get dangerous
01:26 overnight tonight across the target area.