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Winter 2013-14 Pattern Discussion II


buckeyefan1

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I LOVE your honesty. If our politicians thought more like you we would all be much better for it. You should consider a run for mayor!

 

I have no future in politics.  If they were dumb enough to elect me, within three months I would piss off everyone.  Most, multiple times.

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FWIW--

Larry Cosgrove commented on this.
 
1549330_10153737064085235_1595488262_t.j
 
A brief update on the two upcoming storm threats that seem likely to affect the eastern half of the nation on February 3 - 5 and February 8 - 11....

1) The first disturbance in the sequence will have a vast moisture connection. So while in theory its central pressure may not be all that intimidating, an area from Texas and Oklahoma to the Great Lakes and Eastern Seaboard are likely to see a good deal of precipitation. Followed by a fairly intense cold pool through the Midwes...t and much of the Old South.

2) I suspect the February 3 - 5 system will redevelop off of the Virginia Capes, leaving open the possibility for heavy snows in the Northeast. But the GFS ensemble run seems to favor a fast-moving low that moves just west of the spine of the Appalachian Mountains. In that scenario, the Corn belt and lower Great Lakes get hammered by a snow and ice event. Heavy rain and thunderstorms would occur in the warm sector from SE TX and LA into the Tennessee Valley.

3) There is considerable support for a "end winter with a bang" storm 10 to 12 days from now. Same starting point (near Houston TX) as the prior system, but far stronger, taking a more eastward path into NC before climbing up the coast into Nova Scotia. If this feature interacts with the still-impressive Arctic vortex near James Bay, I think very heavy snow, strong wind and biting cold will invade the Dixie states into the Atlantic Coastal Plain. That is a preliminary outlook, and probably will change in later comments.

4) The retreat of the -AO styled blocking signal opens the door to a broad semizonal flow (with embedded shortwaves) across the U.S. after February 13. If so, everyone below the Canadian border sees a fast, huge warm-up with the weather threats shifting to flooding rainfall episodes in the Midwest and Tennessee Valley.

Keep your eye on those storms...

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How much of that is from today's system? Note the snow far south.

TW

 

 None of it is from today's system as it isn't a map of snowcover. It is new snow and it is absolutely way overblown/misleading. The Euro clown maps are laughable from any provider it seems. I don't use WxBell and mine are also overblown. It even kept showing ~4" of snow for SAV-CHS up through this morning's run when we knew there was little snow accum. possible with 850's above 0C! This clown has north ATL getting 2" of snow. That's impossible with 850's well above 0 C. A lot of what they're showing is actually ZR, which would be the primary threat imo if this were to verify closely. So, they're applying a 10:1 multiplier to ZR and are calling it snowfall lol.

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12z hr. 240 snow take it with a Hugh grain of salt.

 

ecmwf_tsnow_se_41.png

 

Yep, this Euro clown map (like most of them) is bogus. Whereas there really is snow in spots, especially N NC, much of what they're calling snow in the CAD regions on this map is actually ZR lmao. This last system was a great example indicating the bogusness of these maps.

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Yep, this Euro clown map (like most of them) is bogus. Whereas there really is snow in spots, especially N NC, much of what they're calling snow in the CAD regions on this map is actually ZR lmao. This last system was a great example indicating the bogusness of these maps.

I figured it was, I couldn't figure out the temps for that storm on there maps? Can you post temp map for the possible CAD event? TIA

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I figured it was, I couldn't figure out the temps for that storm on there maps? Can you post temp map for the possible CAD event? TIA

 

 I have no map I can post, but can say that it has most of the main CAD region in the 20's to low 30's. Then again, in CAD situations, the Euro tends to have a warm bias. Details this far out are, of course, not important.

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Well I'll say this looking at the 18z coming in. That whole "warm up" isn't much of a warm up and doesn't last long. GFS wants the PV dropping in on repeat. 

 

 Fwiw, the 18Z gfs is still another GFS/Euro run showing a MAJOR ZR for much of the main CAD region in the 2/7-8 period. This run has a whopping 1.5-3" of qpf! It isn't this one run that is so sig and details are unimportant. However, it is that there have been several recent runs that have been hinting at a threat and this shows the potential.

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jeesh this all snuck up while watching the storm we just had lol.  i cant believe there is something else on the horizon (but i sure aint complainin')

 

as we have talked about, patterns do tend to repeat, and after what just happened as long as there is any of this cold air we have been getting this winter lurking about i wouldnt discount anything.  the indexes etc. may not look great, but who cares if we get another dixie storm? 

 

we have had a couple of ice storms sort of forecasted but none has really played out since dec 05 around here (i am talking anything over .25") and wtih this dense cold air i wouldnt be surprised to get an overrunning cad event. 

 

my guess is all that will be needed is a 20% of .10" freezing rain and the entire state of ga will shut down before we even see a drop lol

 

as long as we have this colder air coming in i say lets get what we can while the getting is good :)  it realistically cant last forever, and once it pops up north of us again we might not see if for a while

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 Fwiw, the 18Z gfs is still another GFS/Euro run showing a MAJOR ZR for much of the main CAD region in the 2/7-8 period. This run has a whopping 1.5-3" of qpf! It isn't this one run that is so sig and details are unimportant. However, it is that there have been several recent runs that have been hinting at a threat and this shows the potential.

 

The gfs, euro, and cmc are all showing a storm in this time frame so that's a good sign.

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Top right panel please; of course these have been all over the place this winter and this is fantasy land however even the possibility is exciting.

 

attachicon.gifv2_012914_CFSv2.png

 

Yeah, can we cash in on that one now?  :snowing:   This one is waaay out there in time. Has there ever been a storm modeled 10 days out that actually happened in the southeast (not necessarily as modeled but happened at all) ?

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