After 26 Saturday morning, temperatures may reach 71 by Friday.
Showers & isolated thunder are possible Wednesday after clearing today & sun tomorrow as highs warm to 55-60 by tomorrow. Highs Wednesday will tend to run in the 50s to perhaps some lower 60s after 50s today with clearing & 50s to 60s tomorrow with sun.
Some showers/t’storms are possible in the north Thursday along warm front with partly to mostly cloudy skies & highs 55-70, north to south in the Tri-State.
Highly sheared environment will be over area Friday & into Friday night. Wind fields through the troposphere will become very strong with winds at 5,000′, even 2000′ perhaps 55-65 mph as low-level jet strengthens. +110 mph upper jet streaks will nose in & pass, strengthening the surface low to our northwest that may produce a wind storm of wind-driven snow from Nebraska to Minnesota.
A long, large-scale QLCS squall line will likely develop just west of the Mississippi River & race eastward at +55 mph. Although CAPE may end up (especially surface CAPE) being modest, there should be enough, given the shear & dynamics, for severe weather threat.
Damaging straight-line winds would be the risk, though meso-vortices that develop in the narrow line may support isolated, brief, rain-wrapped tornado risk.
We will continue to monitor. Even since last week there has been a severe weather signature from Illinois to Arkansas & northeastern Texas. It has always been a question of CAPE, despite the highly-sheared environment. Today, there is better consensus from models & now even SPC of severe risk expansion farther east with bit better CAPE forecast.
This would tend to occur Friday evening-night.
Otherwise, Friday looks like a warm, windy day with south-southwest winds gusting to 40 mph at times.
Saturday looks windy & cooler with highs in the 50s with clearing.