Johnno Posted December 7, 2013 Share Posted December 7, 2013 Sleep started mixing here about 15 mins ago, sleet and rain for now Link to comment Share on other sites More sharing options...
Tropopause_Fold Posted December 7, 2013 Share Posted December 7, 2013 Alright well enjoy. About to have some me time with son in bed and mom at neighbors. Smithwicks FTW. Link to comment Share on other sites More sharing options...
RUNNAWAYICEBERG Posted December 7, 2013 Share Posted December 7, 2013 Alright well enjoy. About to have some me time with son in bed and mom at neighbors. Smithwicks FTW. one would think you always have "me" time with that post count. Link to comment Share on other sites More sharing options...
N. OF PIKE Posted December 7, 2013 Share Posted December 7, 2013 Looks like hvy precip will be a bit further south than modeled, looks like wxmanmitch to MpM riding N line maybe over to MHT later. Who knows just more weenie interpretation Lets get hubb dave and Ashburnham poster to flip next hour for some real fun, that radar looks juiced in sw mass , also looks like plenty more to impact the nw ct over to hft tolland / orh corridor later. I am wondering if my area (10 miles n of bos) can dynamically cool down if that precip traverses us without weakening much Link to comment Share on other sites More sharing options...
Tropopause_Fold Posted December 7, 2013 Share Posted December 7, 2013 i'm out as well... think snow. Link to comment Share on other sites More sharing options...
SnowMan Posted December 7, 2013 Share Posted December 7, 2013 35.9 here now... Link to comment Share on other sites More sharing options...
dendrite Posted December 7, 2013 Share Posted December 7, 2013 The only thing good about cloud physics...you can relate it to snow. heh, I love that stuff. Link to comment Share on other sites More sharing options...
HIPPYVALLEY Posted December 7, 2013 Share Posted December 7, 2013 33F. Mix of rain and cat paws now. Hopefully we flip soon. Link to comment Share on other sites More sharing options...
Typhoon Tip Posted December 7, 2013 Share Posted December 7, 2013 Sleet really ripping now... rattling away on the awning outside the front door. Ayer 36 Link to comment Share on other sites More sharing options...
moneypitmike Posted December 7, 2013 Share Posted December 7, 2013 Down to 31.7. Let it snow let it snow let it snow. Link to comment Share on other sites More sharing options...
CapturedNature Posted December 7, 2013 Share Posted December 7, 2013 Sleet mixing in just started 35.2 Straight rain and 36° here but I'm sure it's coming. 34/32 over in Union. Great discussion mets on snow growth. It's reminding me of a lot of stuff I set aside to make room for my current career. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 7, 2013 Share Posted December 7, 2013 Just read a nice article about Bergeron process. Seems very appropriate tonight Link to comment Share on other sites More sharing options...
Modfan Posted December 7, 2013 Share Posted December 7, 2013 37 here, and just a moderate rain Link to comment Share on other sites More sharing options...
SnowMan Posted December 7, 2013 Share Posted December 7, 2013 Just read a nice article about Bergeron process. Seems very appropriate tonight Link? Link to comment Share on other sites More sharing options...
Snowciopath Posted December 7, 2013 Share Posted December 7, 2013 A few sleet pellets starting to come down here in Ashford. 36F Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 7, 2013 Share Posted December 7, 2013 Link? http://weather.cod.edu/sirvatka/bergeron.html Link to comment Share on other sites More sharing options...
eduggs Posted December 7, 2013 Share Posted December 7, 2013 Mixed precip all the way back to BGM. Must be some sneaky warm layer near 800mb. Surprised it hasn't mixed out in heavier echoes. What I see outside isn't pure sleet. Looks more like partially melted flakes that refroze in a colder layer. ASOUT I don't remember much talk of a sneaky warm layer for the southern tier of NY. And it turns out that's not the problem at BGM. Link to comment Share on other sites More sharing options...
Nor'easterblizzard Posted December 7, 2013 Share Posted December 7, 2013 IP/RN now. 37/34 Temp/DP Link to comment Share on other sites More sharing options...
CoastalWx Posted December 7, 2013 Share Posted December 7, 2013 heh, I love that stuff. That stuff I loved...but of course the prof wasn't my favorite so that may be part of the problem. Link to comment Share on other sites More sharing options...
dendrite Posted December 7, 2013 Share Posted December 7, 2013 When you say lift is below that do you mean it isn't strong enough to get the water droplets into the snow growth zone? sorry for noob question but I have zero understanding as to how this works... When we talk about the snow growth zone usually what we mean is the temperature zone in the cloud that produces the best crystal growth which is the -12C to -18C layer. If you get a deep layer of those temps with saturation and good lift you'll start cranking out some large dendrites. You can still get snow growth outside of that temp zone, but you start seeing smaller dendrites or other crystal types. The problem in those -RAPL areas is that cloud temps are mediocre to produce ice nuclei so like Scott said, you have mostly supercooled droplets precipitating via that lift. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted December 7, 2013 Share Posted December 7, 2013 Some weird **** falling out there now. Not really sleet pellets, but not snow Ice rimed drops? Link to comment Share on other sites More sharing options...
SnowMan Posted December 7, 2013 Share Posted December 7, 2013 Mangled flakes mixing in 35.7 Link to comment Share on other sites More sharing options...
SnowMan Posted December 7, 2013 Share Posted December 7, 2013 http://weather.cod.edu/sirvatka/bergeron.html When we talk about the snow growth zone usually what we mean is the temperature zone in the cloud that produces the best crystal growth which is the -12C to -18C layer. If you get a deep layer of those temps with saturation and good lift you'll start cranking out some large dendrites. You can still get snow growth outside of that temp zone, but you start seeing smaller dendrites or other crystal types. The problem in those -RAPL areas is that cloud temps are mediocre to produce ice nuclei so like Scott said, you have mostly supercooled droplets precipitating via that lift. Thanks! Link to comment Share on other sites More sharing options...
powderfreak Posted December 7, 2013 Share Posted December 7, 2013 The problem in those -RAPL areas is that cloud temps are mediocre to produce ice nuclei so like Scott said, you have mostly supercooled droplets precipitating via that lift. It's a pretty interesting situation when you are getting sleet but it's not from melting and refreezing of flakes... super-cooled droplets falling and freezing on their way down, and then possibly melting right at the surface to form that RNPL mix. Don't see that too often. Link to comment Share on other sites More sharing options...
dendrite Posted December 7, 2013 Share Posted December 7, 2013 It's a pretty interesting situation when you are getting sleet but it's not from melting and refreezing of flakes... super-cooled droplets falling and freezing on their way down, and then possibly melting right at the surface to form that RNPL mix. Don't see that too often. Usually when you see it it's brief and during WAA situations where you start torching the mid-levels, but there's a lingering cold dry layer around 875-925mb or something. Link to comment Share on other sites More sharing options...
dryslot Posted December 7, 2013 Share Posted December 7, 2013 Some weird **** falling out there now. Not really sleet pellets, but not snow Ice rimed drops? graupel Link to comment Share on other sites More sharing options...
Bostonseminole Posted December 7, 2013 Author Share Posted December 7, 2013 38 with sleet mixing in Link to comment Share on other sites More sharing options...
wxmanmitch Posted December 7, 2013 Share Posted December 7, 2013 Back to sleet now with the lighter precip. That warm layer up there is very stubborn. Link to comment Share on other sites More sharing options...
ROOSTA Posted December 7, 2013 Share Posted December 7, 2013 Pinging on the bulkhead. Just think back 10 years ago. Nice to be out of the gate (winter) and chasing swifty. T= 40.7°F Td=37.7°F Link to comment Share on other sites More sharing options...
CT Rain Posted December 7, 2013 Share Posted December 7, 2013 lol this past page has made me LOL - well done everyone. Seems like things are on target. Snow growth issues on the northern fringe near ALB with sneaky warm layers causing issues even where it is 33F. I posted earlier that I thought this wouldn't be your typical "the boundary layer is killing us stuff" - rather a lot of mid level warmth that is in no hurry to leave. We are advecting a nice shot of cold from the sfc through 900 mb so we should continue to tickle the sleet south. Link to comment Share on other sites More sharing options...
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