This Warmup Won’t Have Sailing Quite as Smooth as the LastMay 13th, 2013 at 10:41 pm by Don Paul under 4 Warn Weather
After the frosty start to this week, a warm front will arrive in WNY by Wednesday AM, ushering in some Sct Showers & Tstorms. This will be elevated convection, so it will not be impacted by the cooler lake waters. The models for wind directional change with increased altitude show quite a bit of low level veering/wind shear, so some thunderstorms with rotation can’t be ruled out. After one or 2 rounds of Sct convective cells into early Wednesday afternoon, things should settle down for a few days, with daytime highs averaging in the low 70s. The chance for Sct convection will probably return by Sunday into Monday and Tuesday. The airmass at that time will be warm and instability will be on the increase. An upper level trough may take on an orientation (negative tilt showing in some ensemble means) which would increase advection of warm & humid air and help create better dynamics for strong tstorms by Tuesday. A cold upper level low well to the NW of the surface low will feed cold air aloft and create more impressive lapse rates.
It’s VERY early in the game, but this kind of pattern can be recognized as one which can increase the chance for severe tstorms over parts of the Great Lakes.