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February storm threat discussion


Ellinwood

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Gfs doesn't phase the northern vort. Instead it acts like confluence crushing this storm. The ggem, jma, ukie and now euro, all phase the northern vort which as a result expands the precip north.

Yeah, was just going through the various runs and noticed that. Might be time to employ the weenie rationale of GFS having a S/E bias or some nonsense.

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Can I just point out, a couple of hours early, that now that folks are beginning to get buzzed, is when the next model run will suddenly show 60 degree rain for Sunday PM....?

Just prep, as it seems to happen every time. We need a hotdog-jumping-off-a-roof emoticon.

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Yeah, was just going through the various runs and noticed that. Might be time to employ the weenie rationale of GFS having a S/E bias or some nonsense.

But in this case the northern piece is too far NORTH on the GFS. It doesnt dive in south enough to phase with the cutoff.

18z NAM and GFS will be telling.

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Well at 60 hours, the sfc temp is like 40F for DC and upper 30s for the suburbs (and low 40s SE of DC)...so that is pretty warm to start, but then it cools. That's why I said it would probably be rain changing to snow if Euro was taken at face value.

My thoughts behind my last post were 1) at 60 hours the Euro is probably too warm at the surface, especially given 2) DC northward will be on the northern side of the frontal boundary, giving them a light wind of out the north. By giving the actual temp range of mid 30s to 40, that lets people know that, because it's the Euro 60 hours out with a light north wind, they could probably chop off several degrees from the forecast and get it that much closer to snow at the onset.

That's just my analysis given the 12z Euro solution, anyway.

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My thoughts behind my last post were 1) at 60 hours the Euro is probably too warm at the surface, especially given 2) DC northward will be on the northern side of the frontal boundary, giving them a light wind of out the north. By giving the actual temp range of mid 30s to 40, that lets people know that, because it's the Euro 60 hours out with a light north wind, they could probably chop off several degrees from the forecast and get it that much closer to snow at the onset.

That's just my analysis given the 12z Euro solution, anyway.

agree.. i think the euro solution would be all snow pretty much if it comes to pass. but there's always grave danger being on the edge if you don't want to get screwed so might need some mass weenie energy to keep it coming north a bit.

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Well, it is true that several of the GFS ens members liked us. Now the Euro paints snow down around the Harrisonburg area. We never did punt. We took a couple of timeouts, then had the refs review the last spot of the ball, so we still have options here.

I called a late timeout just before I punted the ball away... mayb a super long FG try now?

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agree.. i think the euro solution would be all snow pretty much if it comes to pass. but there's always grave danger being on the edge if you don't want to get screwed so might need some mass weenie energy to keep it coming north a bit.

I'm sure steadier precip would help...if the precip stays light, it would obviously be a little tougher to cool the BL. With temps aloft decently cold, I'd def root for a tick north/stronger to get heavier precip.

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