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January 2014 pattern discussion


CapturedNature

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Euro ensembles completely break down the EPO ridge within 2-3 days..but leave a vestige up in the Arctic ocean and the ridge tries to rebuild at the end of the run. My guess is the period in the middle where it breaks down is too quick.

The 00z yesterday run was awful lol. Then 12z did a 180 only to come back down a bit but not like yesterday. Just seems too unstable for whatever reason.

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This pattern is a nightmare for me forecasting. For a few weeks I've held the idea of a warm up in the East around the 10th for mid-month and that is what the euro ens show, however, I dont trust it for one second given the hellish time its had at times breaking down Alaskan pattern in the long range (and the insane run-to-run volatility over the weekend)...I thought the MJO would support that warm up idea but I'm not so sure I see that panning out here, so meh. 

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This pattern is a nightmare for me forecasting. For a few weeks I've held the idea of a warm up in the East around the 10th for mid-month and that is what the euro ens show, however, I dont trust it for one second given the hellish time its had at times breaking down Alaskan pattern in the long range (and the insane run-to-run volatility over the weekend)...I thought the MJO would support that warm up idea but I'm not so sure I see that panning out here, so meh. 

 

It's sort of pushing east already. Roundy's stuff shows some nice subsidence in the IO towards mid month. I agree it may get volatile after the 10th...but as long as the PV is on our side and some higher heights exists near the arctic and AK...I have a hard time seeing this break down like the EC tries to do. The fact that it's wavered shows that it has no idea how to handle it. I know it is usually the better guidance, but it doesn't always have to be. Just anecdotal, but it seems the GEFS/GGEM combo has been pretty good. Also, the fast flow is gonna be tough to time these cold shots too.

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I was looking at the objective analogs on the ensembles and the cold signal for the CONUS is overwhelming. Not a single January on there was even close to average save maybe Jan 1951 which had a frigid N plains and NW but some offsetting warmth in the east. But the rest are just frigid.

 

Composite shows near normal for the SE US to above normal in FL and below average from Northeast and then westward basically through the rest of the CONUS.  

 

We'll see how well this idea plays out.

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Is there a better chance of a cold solution or a warm solution for the Jan 7th storm? Could we looking at some sort of secondary transfer and an icy scenario instead of Jan 1996 all over again?

 

 

The antecedent cold is pushing it further SE than previously modeled...it could be an ugly HV runner though like the Euro shows, and perhaps even as far west as a lakes cutter....but we'll also have to watch for a secondary sfc reflection and an icier scenario. Still really far out to figure this one out.

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The antecedent cold is pushing it further SE than previously modeled...it could be an ugly HV runner though like the Euro shows, and perhaps even as far west as a lakes cutter....but we'll also have to watch for a secondary sfc reflection and an icier scenario. Still really far out to figure this one out.

Yeah I mean Somehiw a 960 low over Stowe doesn't seem realistic given the overwhelming expanse of the cold
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Umm..we didn't have nearly the same setup going into that. There wasn't Arctic air enveloping the nation..Not even close

 

Arctic air doesn't mean squat in SNE if the s/w forcing is that strong. Again, I am not saying the euro is right..in fact I do not buy it...but your logic is flawed.

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Umm..we didn't have nearly the same setup going into that. There wasn't Arctic air enveloping the nation..Not even close

 

 

You should check out the sequence from Jan 15-19, 1994...one fo the coldest airmasses to hit the US on record...and we had a low tracking over Logan11's fanny in that. Nobody really remembers it much because it was just a brief shot of mild air in an otherwise frigid pattern...but it can still happen.

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You should check out the sequence from Jan 15-19, 1994...one fo the coldest airmasses to hit the US on record...and we had a low tracking over Logan11's fanny in that. Nobody really remembers it much because it was just a brief shot of mild air in an otherwise frigid pattern...but it can still happen.

i remember that--we went from 5 degrees to 45 degrees in like 3 hours-rained and then flash froze.

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