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January storm threat discussion #2


Ian

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Matt tried to answer and gave his opinion which is what I was after, but I think torch is pretty subjective and depends on each person's own definition.

I saw his post after I made mine - I agree with his response. A fluke day (like the Saturday two weeks ago) to me isn't really a torch. Needs to be a few days like that in a row.

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Matt tried to answer and gave his opinion which is what I was after, but I think torch is pretty subjective and depends on each person's own definition.

plus, since those are 850 temps, we still could be stuck at a raw 50 degrees at 2m

I didn't look at 2m temps, but just sayin' it may not "feel" like a torch

of course, that's no consolation to the fact that it is a cr@ppy pattern with no reasonable hope for snow...so why did I even bother to post this? :ee:

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Some of the "warmers" on the board made it seem like we'd have a week to 10 days of unbroken 60's and 70's, if not stating that explicitly, by showing the extreme long-range model progs. Until I see kids swimming in the creeks around here, like February '76, I'll feel like I dodged the flame. :P

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in jan 2007 we had 2 separate 5 day periods that averaged +20 and +19 respectively and in Jan 2008 we had a 7 day period that averaged +18....is that what we are looking at?...I am not seeing anything like that, but maybe it does happen at some point in the next 2 weeks

I don't think anything that extreme, but a 10 day period of +10-+14 seems in the realm

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that would be a torch imo, especially if no minus days in the period....+14 over 10 days would be significant

It doesn't look like the intensity is as great as we've seen in previous Januarys (according to your previous post), but the duration may be the significant part. I only have the weeklies as a guide, but the Week 2 (Jan 23-29) is +9-10, which is pretty significant for an ensemble at that lead time.

Interestingly, we haven't seen the Euro op intensity the warmth as those dates have been coming into its range, which is what I thought would happen and why I was starting to chirp about 70 at PHL/BWI/DCA last week. That appears to be the error I made in my analysis of the pattern.

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that would be a torch imo, especially if no minus days in the period....+14 over 10 days would be significant

The only thing that could ruin that would be a sneaky high to the north that would turn our winds around to the east. Then it's low clouds and drizzle city with temps in the upper 40's by day, low 40's at night. While still well above normal, not my idea of enjoyable weather.

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Totally off topic but i am going to Detroit tomorrow and i am thrilled with the chance i get to see an inch of snow there. That show's how sad this winter has been when the highlight of your trip is the possibility of seeing an inch of snow. I will let you guys know what snow looks like if i can post from there tomorrow.

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For the second straight run the gefs ens mean is showing a negative NAO at the end of the run with high heights over Greenland and lower across our area while also showing the negative anomaly center over Ak shifting to near the Aleutians, that would start to dry out the west again as a weak positive pna pattern tried to develop. 384 ensemble mean forecast still can be pretty bad but at least it shows a potentially more interesting pattern than will be present for the next 10 to 12 days.

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It doesn't look like the intensity is as great as we've seen in previous Januarys (according to your previous post), but the duration may be the significant part. I only have the weeklies as a guide, but the Week 2 (Jan 23-29) is +9-10, which is pretty significant for an ensemble at that lead time.

Interestingly, we haven't seen the Euro op intensity the warmth as those dates have been coming into its range, which is what I thought would happen and why I was starting to chirp about 70 at PHL/BWI/DCA last week. That appears to be the error I made in my analysis of the pattern.

Thanks for your thoughts, Adam! :)

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For the second straight run the gefs ens mean is showing a negative NAO at the end of the run with high heights over Greenland and lower across our area while also showing the negative anomaly center over Ak shifting to near the Aleutians, that would start to dry out the west again as a weak positive pna pattern tried to develop. 384 ensemble mean forecast still can be pretty bad but at least it shows a potentially more interesting pattern than will be present for the next 10 to 12 days.

The Euro ensembles support the idea of blocking in the Davis Straight by the end of January...the PAC isnt quite as good as it has the lower height anomaly a little E of the GEFS...but its still retrograded enough to pop a bit of a ridge over W Canada and PAC NW.

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The Euro ensembles support the idea of blocking in the Davis Straight by the end of January...the PAC isnt quite as good as it has the lower height anomaly a little E of the GEFS...but its still retrograded enough to pop a bit of a ridge over W Canada and PAC NW.

That's nice to hear. It might make me temper my article a little tomorrow.

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That's nice to hear. It might make me temper my article a little tomorrow.

I'm pleasantly surprised to see the NAO signal popping up more on the ensembles...just a couple days ago it didn't really have it but its been showing up a lot stronger the past couple of runs.

Hopefully it isn't a false signal.

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I'm pleasantly surprised to see the NAO signal popping up more on the ensembles...just a couple days ago it didn't really have it but its been showing up a lot stronger the past couple of runs.

Hopefully it isn't a false signal.

That's also my hope. It's funny, this is the best look that a long range prog has had all winter and it seems like it is slipping by the radar. It's still too early to dash off and say there is going to be a pattern change but it the signal continues for several more runs, I'd be surprised if some of the more aggressive forecasters didn't start calling for a pattern change. Heck I might even bite. I guess JB might already have done that but he's been all over the place this year.

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