Is it better to run lower tire pressures (<28 psi) in the snow?
Looks like I found my answer with a little Googling:
[i]"The Tire Industry Safety Council offers these additional tips for winter driving:
Never reduce tire pressure to increase traction on snow, ice, or in mud. It doesn’t work, and your tires will be seriously underinflated.
Check your tire pressure frequently during cold weather. Every time the outside temperature drops 10 degrees Fahrenheit, the air pressure inside your tires goes down about 1 pound per square inch."[/i]
For driving through snow you actually want a narrower tire. Cuts through snow better and has a longer (parallel to the car) contact patch for increased straight-line traction. Decreasing pressures past 28 would widen the contact patch.
(I know you probably found this out, just posting more information)