Brett répond:   Cold Air holding On near Montreal Just a quick update on the ongoing storm moving up into eastern Canada   I am getting quite concerned that the low-level cold air may indeed hold on across the Montreal region into tonight as the warm front just to the south is having a very difficult time moving northward. My earlier forecast was based on the assumption that this front would push just north of Montreal causing a gradual change to mixed precipitation then rain. As it looks now, surface temperatures will almost certainly remain below freezing in Montreal through the duration of the storm leading to even higher snow accumulations and a continuation of the nasty road conditions. A big question for later Tuesday evening will be whether or not the snow changes over to sleet or freezing rain. Warmer air is indeed moving in aloft as we speak and just a narrow wedge of +1 celsius air well above the ground could cause the change to sleet and if it gets thicker then freezing rain tonight. But does it really matter? The storm has already been a lot worse than earlier forecasts had shown. My feeling at this time is that there will be a few hours of freezing rain later tonight, but snowfall for the storm should range from 20-25 cm. I heard some areas north of the river have already had in excess of 25 cm.   As of 4 pm Tue the front was north of Sherbrooke (-1 celsius with a south wind), but still south of Cornwall (-7 northeast wind) and Montreal (-10 northeast wind).    Why is this happening?   1. The storm system over the Midwestern U.S. is weaker and more strung out than we thought it would be yesterday. With that being the case, the push of warmer air at the low-levels is not nearly as strong and the storm ends up taking a slightly farther south and east track.   2. Computer models are now focusing more energy on a second, likely stronger storm moving out of the Gulf region Wednesday night, and I believe the energy going into this second storm has robbed this first storm to some extent, leaving it weaker and less likely to push northward into the colder air.   Speaking of that second storm late Thursday night and Friday, it appears that this storm could bring moderate accumulations of snow across extreme eastern Quebec, interior northern New England and northern New Brunswick. More on that later.