Winter Storm Maybe Tuesday?

This image pretty much summarizes thinking at this time.

The GFS doesn't have the front coming in until Tuesday afternoon which is considered to be too slow by the good people at the Ft. Worth WFO. 

Here is the 500 mb relative vorticity for noon on Tuesday according to the GFS. The trough is very strong and given that the highest vorticity maximum is still on the back side it isn't done digging.

At this point the GFS has a lot of precipitation breaking out across Texas and Oklahoma, but by the time temperatures drop below freezing Tuesday night moist of the precipitation is ended.
However given the amount of precipitation and given that it is not due strictly to lifting along the front but from the large trough digging into the west a significant icing event could occur if the front is 6 to 12 hours faster in this case.

Looks like a potentially nasty storm for Oklahoma and the Texas Panhandle at least.

Here is the 1000 - 500mb thickness. The critical 540 line (generally considered to be the rain snow line) is still pretty far north of the Red River according to the GFS.  

Here is an image from the ECMWF... looks quite a bit different. Its much faster with just about everything and even stronger with the trough. High pressure is already building deep into South Texas and northern gulf which indicates the front has already pushed deep into South Texas by 6am Tuesday. Not sure, but it probably doesn't have as much precipitation in North Texas guessing  by how far south the trough has dug  (not to mention its speed).