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Model discussion thread


ORH_wxman

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The Euro is out to lunch. First of all we won't radiate at all - secondly, the Euro temps at 925 and 850 don't come close to supporting a high of -6. I'd say something 20F higher than that is more likely.

Yeah I agree. I was thinking like -2 at BDL and maybe hills -6 or so. If we can manage an inch or 2 between squalls and clipper then maybe a bit colder. How much snow does BDL and HFD have left?
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The Euro is out to lunch. First of all we won't radiate at all - secondly, the Euro temps at 925 and 850 don't come close to supporting a high of -6. I'd say something 20F higher than that is more likely. 

 

We have an internal site that I think it is straight 2mt temp data and not blended in anyway (Coastalwx may know). It has BDL at 20/-1 on Thursday off the (Low res I think) Euro. Most of the day is in the teens, but we warm in the evening and overnight on SW flow.

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We have an internal site that I think it is straight 2mt temp data and not blended in anyway (Coastalwx may know). It has BDL at 20/-1 on Thursday off the (Low res I think) Euro. Most of the day is in the teens, but we warm in the evening and overnight on SW flow.

 

I think it's just raw data. Not sure on the resolution though. Not sure it warms that much though at BDL.

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It may be mitigated though if some areas sort of decouple? Kind of weird to keep warming, but it could happen. It's like a 12 hr brutal cold shot. I guess we'll see.

 

I would think the timing differences between the Nam and the GFS would have serious implications on who might decouple.  Nam would seem a lot more bullish on that.

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We have an internal site that I think it is straight 2mt temp data and not blended in anyway (Coastalwx may know). It has BDL at 20/-1 on Thursday off the (Low res I think) Euro. Most of the day is in the teens, but we warm in the evening and overnight on SW flow.

 

Yeah it's the high res Euro that seems to have the super-cold 2m temp bias for whatever reason. 

 

The lower res Euro is definitely more realistic. 

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Will the lows rival Jan 2004?  I know it is much shorter lived

 

I don't think so...we are about 4C warmer than that outbreak aloft..2004 got to like -31 or -32C 850 temps and this one is more like -27C...perhaps briefly -28C...this is for ORH. I see ORH maybe getting to like -6F or -7F or so vs -12F in 2004.

 

Also, this is a quick shot, so I definitely don't see a daytime high barely above 0F like that year. We'd need it to hang around another 8-10 hours. The low temps are what will be the story of this outbreak.

 

Christmas 1980 had a very short duration (but intense) cold shot too...it lasted basically like 24 hours.

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I don't think so...we are about 4C warmer than that outbreak aloft..2004 got to like -31 or -32C 850 temps and this one is more like -27C...perhaps briefly -28C...this is for ORH. I see ORH maybe getting to like -6F or -7F or so vs -12F in 2004.

 

Also, this is a quick shot, so I definitely don't see a daytime high barely above 0F like that year. We'd need it to hang around another 8-10 hours. The low temps are what will be the story of this outbreak.

 

Christmas 1980 had a very short duration (but intense) cold shot too...it lasted basically like 24 hours.

 

My plan is to stay indoors this time!

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I don't think so...we are about 4C warmer than that outbreak aloft..2004 got to like -31 or -32C 850 temps and this one is more like -27C...perhaps briefly -28C...this is for ORH. I see ORH maybe getting to like -6F or -7F or so vs -12F in 2004.

 

Also, this is a quick shot, so I definitely don't see a daytime high barely above 0F like that year. We'd need it to hang around another 8-10 hours. The low temps are what will be the story of this outbreak.

 

Christmas 1980 had a very short duration (but intense) cold shot too...it lasted basically like 24 hours.

 

Was thinking about 1980 earlier. The core of that cold came in around 12z with that one and temperatures dropped after sunrise. This one will be about 6-10 hours earlier in the day I think. 

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So this set up is coldest for the higher elevations /non radiators right ?

Also prob not a huge spread between Boston and the burbs ?

 

 

Yeah numbers are pretty uniform since its strong CAA from the NNW...BOS will still have the UHI, but it won't be as glaring. MET is 3F and MAV is 4F for BOS, but I'm guessing those numbers will come down there because the usual BOS climo is playing into that still about 60-72 hours out.

 

I'm not sure BOS will go below 0F, but it will be close. I'd think they would if we had good snow cover across the CP to the north of BOS, but unless the clipper can dust things with an inch or so, then they won't have that advantage.

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So this set up is coldest for the higher elevations /non radiators right ?

Also prob not a huge spread between Boston and the burbs ?

 

Another resemblance to 2004, as the wind never quit.  My coldest afternoon highs here, -11 and -8, were on days with lows of -23 and -22.  Plenty cold but nothing extraordinary like the highs - my median bottom-of-winter temp is -24. 

12z GFS suggests Thursday temps about 0/-15 at my place, assuming no cheap start/end of period highs.  It also sports an H5 temp of -49C at FVE, about the lowest I've ever noted, and about 0.15" total qpf in the foothills for the entire 16-day period. 

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Yeah numbers are pretty uniform since its strong CAA from the NNW...BOS will still have the UHI, but it won't be as glaring. MET is 3F and MAV is 4F for BOS, but I'm guessing those numbers will come down there because the usual BOS climo is playing into that still about 60-72 hours out.

 

I'm not sure BOS will go below 0F, but it will be close. I'd think they would if we had good snow cover across the CP to the north of BOS, but unless the clipper can dust things with an inch or so, then they won't have that advantage.

 

Just looked at MAV/MET for TAN and the GFS is actually coming in colder then the NAM right now.  GFS is just below 0F and the NAM slightly above.  Will have to keep an eye on the winds.  If they go calm and we have clear skies, I'll take the under.  I'm think -5/-6F right now.  Not quite the coldest reading I've seen in my 10 years living there but close.

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I don't think so...we are about 4C warmer than that outbreak aloft..2004 got to like -31 or -32C 850 temps and this one is more like -27C...perhaps briefly -28C...this is for ORH. I see ORH maybe getting to like -6F or -7F or so vs -12F in 2004.

 

Also, this is a quick shot, so I definitely don't see a daytime high barely above 0F like that year. We'd need it to hang around another 8-10 hours. The low temps are what will be the story of this outbreak.

 

Christmas 1980 had a very short duration (but intense) cold shot too...it lasted basically like 24 hours.

 

Yeah that trend was headed that way ... but since about three days ago the signal has been taming some.

 

No kidding about the quick shot!  12-18 hour period where the temperatures are hugely controlled by the advention terms.  This is the type of air mass we get in winter that almost entirely mutes the effect of the feebled sun.  1pm low, 1am high Nice!   Although ... I haven't looked at the timing as such. 

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Verbatim the GFS OP is ~ 6 hours of steady light snow for all of New England for Friday.   :snowing:

 

Edit:  looks dryer on the Para GFS...

 

Edit 2: Also Tuesday of next week looks like a chance for a coastal to me : ) I'm seeing a kinky little s/w over the MA that certainly has room to slide north east.

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James gets his 4" on Friday on the Canadian from that clipper. Would be another elevated ratio event likely if it did verify(18z GFS had ~15:1 ratios in the text data when it had this which would seem about right).

 

GFS and ParaGFS both were lighter on QPF overall and kept the best of it in NNE.

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