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March 7th-9th Potential Storm


wisconsinwx

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Yeah, at hr 69 it has a 1004 low just west of chicago. I guess it ended up tracking more NEish to the WI/IL border area.

Hour 66:

Couldn't get much closer for here. That said, since the location of the 0C line is at the end of that 6 hour precip period, all of that liquid is rain most likely.

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Surface is probably too warm for any good accumlations for you wisconsin.

I got the NAM data so far out to hr 60, and your surface temps is already 34-35.

Hoosier, if the surface is like 33, and the 700, 750, 800, 850 etc is below freezing except the 900mb area, that would be snow, correct?

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Surface is probably too warm for any good accumlations for you wisconsin.

I got the NAM data so far out to hr 60, and your surface temps is already 34-35.

Hoosier, if the surface is like 33, and the 700, 750, 800, 850 etc is below freezing except the 900mb area, that would be snow, correct?

I knew they wouldn't be at or below freezing, but even being close to freezing is a moral victory, given the possibility of 40 degree temps.

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Surface is probably too warm for any good accumlations for you wisconsin.

I got the NAM data so far out to hr 60, and your surface temps is already 34-35.

Hoosier, if the surface is like 33, and the 700, 750, 800, 850 etc is below freezing except the 900mb area, that would be snow, correct?

If the 900 mb area isn't too warm, probably.

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NAM continues with a wet bulb snowfall event for YYZ. If the pcpn could start earlier or the low tracks further south I'd be more comfortable buying into this.

Get the euro to come south and i'd be a lot more comfortable in you pulling out a detroit feb. 20/21.. Euro is just blazing warm/cold rain. Hopefully it was blazing before the 12z run.

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Thanks. So as long as everything is below 0, the surface temp could be a bit above 32 right? I checked the snow depth (I know, not very accurate etc) and it has parts of s. wi in the 8 inch range, which would make sense.

As long as everything, from say, 925mb and up is below freezing, and as long as that the air closest to the sfc is not too much above freezing (say less than 33.5), you can get accumulating snow...assuming sufficient precip rates.

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btw...regardless of what the EURO or GGEM shows tonight, I'm not buying any type of retrograding secondary low in the OV. Progressive GFS is the ticket. We've seen twice this winter thus far where the EURO and GGEM try to go nuts with full latitude, uber neg. tilt storms in the medium range and subsequently getting open fist b**ch slapped by the GFS.

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The recent parade of storms over the last few weeks have tracked along the existing baroclinic zone. The snow in the cold sector has generally been limited to fairly narrow swaths. This storm now appears to be no different. Without significant amounts of cold air on the move, I don't see any real possibility for widespread snows anytime soon. Sure this system will no doubt lay down a narrow band of decent snows, but it appears to be narrow enough that it will take up until the last second to completely narrow down where it ends up. We need an impressive push of arctic air if we're going to see something more impressive in the wintry department IMO.

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