Soundings from the 12k NAM stink and are similar to the 12z hrrr with most of us just way too warm in the lower levels.
Man it really is close, maybe a few snow islands, completely rate driven3k has a few blips of snowView attachment 58735
Man that is so close. I mean, I think that sounding would produced a few flakes mixed in. It would be nice not to have to rely on an isothermal layer all the way up to 800 mb, and I think that's really what's going to kill this event. It looks like we're already forcing a ton of ascent, so it's difficult to imagine the precip could get much heavier to cover those last few degrees at the surface. If we could just get things a degree or two cooler anywhere aloft, we could see a more widespread changeover at least.
Yeah it’s not impossible for last minute trends, but unlikely, 3km is close while the hrrr slightly mixes out the BL which kills it, (I though that was a bias the old hrrr has, I guess they didn’t fix it)Man that is so close. I mean, I think that sounding would produced a few flakes mixed in. It would be nice not to have to rely on an isothermal layer all the way up to 800 mb, and I think that's really what's going to kill this event. It looks like we're already forcing a ton of ascent, so it's difficult to imagine the precip could get much heavier to cover those last few degrees at the surface. If we could just get things a degree or two cooler anywhere aloft, we could see a more widespread changeover at least.
I bet there will be a few people, though, who get to see some huge mangled aggregate flakes. That's what you get when you are melting so much above the surface.
Last degree is the hardest1 degree less in all layers is all I’m asking View attachment 58768View attachment 58769
I wouldn't complain it's not trash dayEven if snow mixes in by some miracle, I can’t imagine this would even be a trash can topper outside the mountains.
That's painful1 degree less in all layers is all I’m asking View attachment 58768View attachment 58769
1 degree less in all layers is all I’m asking View attachment 58768View attachment 58769
RGEM for tonight looks to be significantly colder at the surface than the NAM or any other model. That cold air sticks around as precip sets in. But I guess RGEM doesn't have heavy enough precipitation to generate a strong isothermal layer like the 3km NAM?