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Pre Xmas storm


mahk_webstah

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For the 1998 ice storm I was living just north of Burlington in Colchesterand working in Stowe.  It was two completely different worlds.  In Colchester telephone poles were snapped because of the ice and we were without power for 5 days.  In Stowe there was decorative ice on the trees :)

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For the 1998 ice storm I was living just north of Burlington in Colchesterand working in Stowe.  It was two completely different worlds.  In Colchester telephone poles were snapped because of the ice and we were without power for 5 days.  In Stowe there was decorative ice on the trees :)

That scares me because I am in winooski. If we see anything like that I will lose heat. I have gas but it is a wall furnace that needs to be plugged in to work.

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It looks like about an inch falls there with temps under 32F, but if some of it is sleet then you might be spared serious damage.

 

http://wxweb.meteostar.com/sample/sample.shtml?text=kbtv

 

Look at the entrenched cold just up the road from you in CYUL....

 

http://wxweb.meteostar.com/sample/sample.shtml?text=cyul

 

That scares me because I am in winooski. If we see anything like that I will lose heat. I have gas but it is a wall furnace that needs to be plugged in to work.

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That scares me because I am in winooski. If we see anything like that I will lose heat. I have gas but it is a wall furnace that needs to be plugged in to work.

 

As long as the boundary is south of BTV and the winds out of the north, that cold low level air in southern Quebec will continue draining down. 

 

I was just looking over the GFS and NAM MOS data, and those have BTV and MVL seeing similar temperatures (colder at MVL on Sunday morning though), while MPV remains above freezing throughout the event.  Interesting gradient as MPV at 1,200ft is a classic ice spot.

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There is usually a 2,000ft layer where the normal dynamics of temp decreasing wih height apply before you hit the inversion. Thats why te ORH hills got Nailed in the 2008 iceslorm.

 

Yeah I see that all the time here in mixed events... its funny because a lot of Mets always hammer the "lower elevations" for ice, but then 1,000-3,000ft gets destroyed at like 29F while the people at 350ft in the "lower elevations" were 32-33F during the whole event.

 

At the ski resort, in 99% of these events, the worst icing and coldest temperatures are at our 2,500ft station, but 1,500ft base is usually pretty close, while down in town its warmed above freezing below 1,000ft. 

 

We usually end up with a temp profile that looks like this, and then ends up confusing people when all the TV mets said the mountain valleys will get the most ice, with less at higher elevations:

4,000ft...35F RN

2,500ft...29F ZR

1,500ft...30F ZR

   750ft...33F RN

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I have seen it plenty of times out here west of KALB.  Cold tends to siphon down the Champlain/Hudson Valleys and at 1k feet here I'm always colder than ALB with more ZR and sometimes I'm even colder than up at GLF in the valley.

 

 

Yeah I see that all the time here in mixed events... its funny because a lot of Mets always hammer the "lower elevations" for ice, but then 1,000-3,000ft gets destroyed at like 29F while the people at 350ft in the "lower elevations" were 32-33F during the whole event.

 

At the ski resort, in 99% of these events, the worst icing and coldest temperatures are at our 2,500ft station, but 1,500ft base is usually pretty close, while down in town its warmed above freezing below 1,000ft. 

 

We usually end up with a temp profile that looks like this, and then ends up confusing people when all the TV mets said the mountain valleys will get the most ice, with less at higher elevations:

4,000ft...35F RN

2,500ft...29F ZR

1,500ft...30F ZR

   750ft...33F RN

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Please explain this to me, in 98 I went for a weenie drive through VT up to Jay peak then to N Maine.,the elevations were far more destructed than the valleys, seems elevation rather than Latitude played a big role, how does this occur when temps are warmer at height on all soundings. it looked like tornadic damage with all the sheared off hillsides, worse at the peaks,

 

I've seen the same in VT during more mundane icing events.  I think a look at the soundings would probably show temp decreasing with height until hitting an elevated warm layer.  The summits were below that warm layer. 

 

It does still call into question what is causing damming above (or at least at the level of) ridge tops.  Admittedly I have little understanding of the physics of cold air damming other than the usual layman's "banked up against the mountains" theme.

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I think Brunswick could be borderline , esp the south side of town. Close to ocean, i mean perhaps u just get a 32/33 cold rain most of time

I am in the NE corner of town farthest away from the ocean. I forgot to mention that the storm total is 0.7-0.9 QPF and most of that is FZRA. I feel the stationary front will stay off shore. Sunday after the main precip has moved away the temps will come up to 32-35F however during Saturday Night into Sunday the temps stay 28-31F.  

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As long as the boundary is south of BTV and the winds out of the north, that cold low level air in southern Quebec will continue draining down. 

 

I was just looking over the GFS and NAM MOS data, and those have BTV and MVL seeing similar temperatures (colder at MVL on Sunday morning though), while MPV remains above freezing throughout the event.  Interesting gradient as MPV at 1,200ft is a classic ice spot.

I've never really thought of MPV as a great icing spot.  It is located on a pretty wide plateau and cold often drains off into the valleys.  I'm sure that you could probably convince me otherwise with stats but it never seems like this area gets hit particularly hard with ice - which I am fine with.

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The 1998 ice was very elevational as one neared the Whites, incl;uding a "sandwich" effect: mostly RA in Gorham, NH to massive destruction at 2,000' to January's warmest ever on the Rockpile.  However, in the Kennebec and Androscoggin drainages downstream from the mts, elevation appeared to be much less important, and I even saw some aspect effect - north to east aspects had more ice, perhaps because they accreted more than other directions during the lighter precip, while the heavier stuff treated everyone the same.  I saw one of the best examples of this in autumn 1998 while traveling east on the Hurricane Mountain Road in NH/Maine, north of IZG.  Damage was modest on the west-facing NH section, got worse but not terrible at the height of land, but perhaps 200' in elevation down the east slope was terrible, including the most totally destroyed forest stand I saw anywhere.  It was mostly beech which had been about 60' tall and were 10-15" in diameter.  Beech is a strong wood, but once the load gets heavy enough, things really go downhill.  This stand had essentially 100% loss of limbs, which were piled 5-6' deep all around the "asparagus trees", which probably then died.  In Hebron, Maine, where I tracked recovery in a stand with 60% crown loss from ice nearly 3" thick, beech had no regrowth near the breaks and the larger ones died, though a few mid-sized ones had sprouts near the bottom of the tree.

That's amazing stuff

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yeah but it's looking a little better to me...baby steps

 

This is the warmest run yet ... I understand what people want, but this isn't the case... Unless you want baby-steps in the warm direction. But the NAM sucks at that time range.  

 

GFS looks like it is staying course, but not sure how it will handle the fields when it lifts that wave through NYS.

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This is the warmest run yet ... I understand what people want, but this isn't the case... Unless you want baby-steps in the warm direction. But the NAM sucks at that time range.

GFS looks like it is staying course, but not sure how it will handle the fields when it lifts that wave through NYS.

Ah. I interpreted it wrong then and only looked at it through 48. Deleted post since analysis was way off.
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