First Chase Day
It really does feel like Christmas morning! The first chase day of 2018 is upon us. We’re in Nebraska, heading westward towards the Nebraska Panhandle later this morning. Forecast models are in good agreement on the overall setup later today, but the setup itself presents a tremendous amount of complications and subtleties (when does it not?) that will make it a very difficult chase. The first chase usually is the toughest and today does not look to be any different.
The synoptics of the setup features favorable moisture return into the upslope regions of Colorado and Wyoming with favorably positioned instability developing amid a swath of notable mid level winds. This mid level wind maxima shifts eastward into Colorado later today with 500hPa wind speeds exceeding 55kts by 21z. The NAM and HRRR as well as other convective allowing models are in good agreement on this.