wx2fish Posted January 20, 2019 Share Posted January 20, 2019 Just now, ORH_wxman said: I don't see anything to stop it really...esp in NE MA and SE NH. if anything, we're only more likely to get a mesolow forming out to the east of MA to strengthen the CAD. Outside of being on the wrong side of the CF, the only warming mechanism I can see is latent heat...but once in the barrier jet, it is going to easily offset that I think. The biggest question for me is how far SW that secondary push of cold air gets. Should be getting to Ray soon. Just passed through here just north of the border. 24 to 21F in about 10 min Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 2 minutes ago, Ginx snewx said: http://glossary.ametsoc.org/wiki/Barrier_jet This is like ageostrophic flow? Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 2 minutes ago, ORH_wxman said: I don't see anything to stop it really...esp in NE MA and SE NH. if anything, we're only more likely to get a mesolow forming out to the east of MA to strengthen the CAD. Outside of being on the wrong side of the CF, the only warming mechanism I can see is latent heat...but once in the barrier jet, it is going to easily offset that I think. The biggest question for me is how far SW that secondary push of cold air gets. Should be getting to Ray soon. I'm watching the station like a hawk...will let you guys know. Link to comment Share on other sites More sharing options...
ORH_wxman Posted January 20, 2019 Share Posted January 20, 2019 Just now, 40/70 Benchmark said: I'm watching the station like a hawk...will let you guys know. What are you at now? I'll bet you're in the upper teens within an hour. Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 1 minute ago, 40/70 Benchmark said: I'm watching the station like a hawk...will let you guys know. Just dropped two degrees... Link to comment Share on other sites More sharing options...
weathafella Posted January 20, 2019 Share Posted January 20, 2019 First widespread snow event in 2 months. Pretty sad. Link to comment Share on other sites More sharing options...
codfishsnowman Posted January 20, 2019 Share Posted January 20, 2019 at least an inch new, snowing hard but small flakes if it can double intensity or see better flake size we will do fine in only a few hours...we shall see I think the rt2 area will see near double digit amounts b4 pellets Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 17 minutes ago, 40/70 Benchmark said: 26.6/24.6 3/4" Snow growth still stinks. 23.0/20.0 Link to comment Share on other sites More sharing options...
ORH_wxman Posted January 20, 2019 Share Posted January 20, 2019 Just now, weathafella said: First widespread snow event in 2 months. Pretty sad. Enjoy the next few hours...should get some pretty decent goodies over the next 3-4 hours, the good forcing starting to move in. Link to comment Share on other sites More sharing options...
OceanStWx Posted January 20, 2019 Share Posted January 20, 2019 1 minute ago, ORH_wxman said: I don't see anything to stop it really...esp in NE MA and SE NH. if anything, we're only more likely to get a mesolow forming out to the east of MA to strengthen the CAD. Outside of being on the wrong side of the CF, the only warming mechanism I can see is latent heat release form non-snow ptype...but once in the barrier jet, it is going to easily offset that I think. The biggest question for me is how far SW that secondary push of cold air gets. Should be getting to Ray soon. I don't see real strong evidence of the coastal front yet for SNE, but it's really sharp just off the coast from PWM (especially on spectrum width). Link to comment Share on other sites More sharing options...
snowgeek Posted January 20, 2019 Share Posted January 20, 2019 8F / 5f. Dumping here now. Up to 4" Probably close to 2"/hr stuff right now. Was supposed to ski Gore tomorrow but threw the old back out this morning putting my socks on. Will probably be up all night in pain LOL but at least I'll get to watch the storm. Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 22.5/19.8 NNW wind Link to comment Share on other sites More sharing options...
Spanks45 Posted January 20, 2019 Share Posted January 20, 2019 Temperature and dewpoint have actually started to drop a bit over the past hour, now down to 28.5/27.1. The sleet line is close though, you can hear an occasional ping on the glass. 2.1" on the snow board so far.... Link to comment Share on other sites More sharing options...
Bostonseminole Posted January 20, 2019 Share Posted January 20, 2019 the trajectory of that arctic air likely means I'm on the wrong side from what I can see right now. Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 1 minute ago, Bostonseminole said: the trajectory of that arctic air likely means I'm on the wrong side from what I can see right now. I agree....128 will not be spared this time. Link to comment Share on other sites More sharing options...
BuildingScienceWx Posted January 20, 2019 Share Posted January 20, 2019 1.75", heaviest snow of the evening. 1-2"/hr rates. Mix is very close though. 28/28 Link to comment Share on other sites More sharing options...
codfishsnowman Posted January 20, 2019 Share Posted January 20, 2019 2 minutes ago, snowgeek said: 8F / 5f. Dumping here now. Up to 4" Probably close to 2"/hr stuff right now. Was supposed to ski Gore tomorrow but threw the old back out this morning putting my socks on. Will probably be up all night in pain LOL but at least I'll get to watch the storm. omg back pain is the worst, I hope you feel better by tomorrow...this will be a great event for your area Link to comment Share on other sites More sharing options...
rimetree Posted January 20, 2019 Share Posted January 20, 2019 Down to 16F...snow picking up a bit but hard to tell as it's really fluffy Link to comment Share on other sites More sharing options...
ORH_wxman Posted January 20, 2019 Share Posted January 20, 2019 Just now, 40/70 Benchmark said: I agree....128 will not be spared this time. There's a very possible risk of areas really close to Boston getting big ice in this....gotta watch really closely. Kind of been underplayed a bit in all the threats in this storm. Sneaky cold drain and if a mesolow forms tomorrow AM, forget it. Link to comment Share on other sites More sharing options...
OceanStWx Posted January 20, 2019 Share Posted January 20, 2019 6 minutes ago, 40/70 Benchmark said: This is like ageostrophic flow? That's part of the process, but the barrier jet is formed when cold air encounters the terrain. It gets banked there plus cools further due to upslope adiabatic cooling. WAA over the top keeps it from rising over the mountains. Then the pressure gradient gets that cold dome to start moving to the S along the terrain. When we anchor the high, that jet can be quite effective at replenishing the supply of cold. Link to comment Share on other sites More sharing options...
Ginx snewx Posted January 20, 2019 Share Posted January 20, 2019 9 minutes ago, 40/70 Benchmark said: This is like ageostrophic flow? No ageo is at the surface, a barrier jet is about 1 to 2k Barrier jets are formed when at least part of the overall wind flow is perpendicular to a mountain range. In particular, cold air masses — which are very dense — are blocked by higher terrain. With warmer air above, this lid of stability blocks the air from flowing over the mountaintops. Instead, the airflow becomes parallel to the mountain chain and accelerates into a jet. The highest winds are found on the windward side of the mountain range below the ridge peaks. Wind speeds can exceed 50 kt. Barrier jets have been noted in many locations around the world where there is a combination of cold air and mountainous terrain Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 1 minute ago, ORH_wxman said: There's a very possible risk of areas really close to Boston getting big ice in this....gotta watch really closely. 20.7/18.0 NW wind Link to comment Share on other sites More sharing options...
40/70 Benchmark Posted January 20, 2019 Author Share Posted January 20, 2019 2 minutes ago, OceanStWx said: That's part of the process, but the barrier jet is formed when cold air encounters the terrain. It gets banked there plus cools further due to upslope adiabatic cooling. WAA over the top keeps it from rising over the mountains. Then the pressure gradient gets that cold dome to start moving to the S along the terrain. When we anchor the high, that jet can be quite effective at replenishing the supply of cold. Yea, the cold drains down and pools against the east slope of the ORH hills. Link to comment Share on other sites More sharing options...
Ginx snewx Posted January 20, 2019 Share Posted January 20, 2019 Took a digger on the steps lol ok just a knee divot swelling but I had to get out in it. Felt fantastic, surprised how windy it is. First plow went by since Nov 15, whats 65 days between friends Link to comment Share on other sites More sharing options...
512high Posted January 20, 2019 Share Posted January 20, 2019 ASH back and forth 23F now 22F 3mph, light snow Link to comment Share on other sites More sharing options...
Bostonseminole Posted January 20, 2019 Share Posted January 20, 2019 6 minutes ago, 40/70 Benchmark said: I agree....128 will not be spared this time. hope folks are ready, luckily is Sunday. Link to comment Share on other sites More sharing options...
weathafella Posted January 20, 2019 Share Posted January 20, 2019 1 minute ago, Ginx snewx said: Took a digger on the steps lol ok just a knee divot swelling but I had to get out in it. Felt fantastic, surprised how windy it is. First plow went by since Nov 15, whats 65 days between friends Be careful please! But I know the allure for sure... Link to comment Share on other sites More sharing options...
snowgeek Posted January 20, 2019 Share Posted January 20, 2019 omg back pain is the worst, I hope you feel better by tomorrow...this will be a great event for your areaThanks. I hope so! I’ll be happy if I can walk behind my new snowblower tomorrow. . Link to comment Share on other sites More sharing options...
powderfreak Posted January 20, 2019 Share Posted January 20, 2019 Just a nice steady snow at BTV this evening. A balmy -6F and snowing. That is one of the coldest observations you will ever see heading into a decent snow event. Link to comment Share on other sites More sharing options...
dryslot Posted January 20, 2019 Share Posted January 20, 2019 46 minutes ago, Hoth said: Also has been slowly bringing the surface low further south each run. And moves the snow totals up here, Mid levels seem to be cooling more ea run too. Link to comment Share on other sites More sharing options...
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