Cashtown_Coop Posted December 14, 2013 Share Posted December 14, 2013 around 1/2" here. def not as confident as i was earlier. Link to comment Share on other sites More sharing options...
EasternUSWX Posted December 14, 2013 Share Posted December 14, 2013 Latest HRRR brings the goods between about 6 and 9pm. When the run ends at 12am, it seems to be building another area of moderate snow. I like. Link to comment Share on other sites More sharing options...
EasternUSWX Posted December 14, 2013 Share Posted December 14, 2013 Straight booming here. Link to comment Share on other sites More sharing options...
paxpatriot Posted December 14, 2013 Share Posted December 14, 2013 Not looking too good? I already have over an inch. In Greencastle? I can tell you that temps and rates just east of you in Waynesboro are not good. Nothing is sticking, and temps at my house are at 33.4F. That would be odd considering weather usually isn't much different between those two locations. Link to comment Share on other sites More sharing options...
Voyager Posted December 14, 2013 Share Posted December 14, 2013 Given how light the echoes are on radar, I'm pleasantly surprised that this snow is accumulating. Seems we've got about 1/2" here over the past two hours. I've got light to moderate snow falling here with about 1/8 to 1/4 inch. So far so good... Link to comment Share on other sites More sharing options...
heavy_wx Posted December 14, 2013 Share Posted December 14, 2013 Things could get pretty interesting later this afternoon into the evening as the nose of a 250 mb jest streak approaches southern PA, putting much of the region in the left exit region. This could place areas in central PA in the rising branch of a frontogenetic circulation. The 850 mb low and 700 mb trough over Ohio may bring in some relative unstable, moist air into the region at the same time. This may increase the potential for some banding and possible some CSI. The 12z NAM actually has an unstable layer near 650 mb at this time so straight up elevated convection is a possibility. You can see that the 06z GFS brings in a tongue of moist, lower stability air, which poleward of a westerly jet would favor mid-level -EPV values. The question is where exactly does this area of -EPV and frontogenesis set up. Right now it seems to be along a track to the southeast of UNV based on the 06z GFS. The 12z NAM brings it a bit further north. Link to comment Share on other sites More sharing options...
Porsche Posted December 14, 2013 Share Posted December 14, 2013 Light flurries in Lancaster now. Link to comment Share on other sites More sharing options...
NortheastPAWx Posted December 14, 2013 Author Share Posted December 14, 2013 Hoping you're right - I would kill for TSSN! Last - and one of the few times I had it - was March 2011. Link to comment Share on other sites More sharing options...
PennMan Posted December 14, 2013 Share Posted December 14, 2013 Given how light the echoes are on radar, I'm pleasantly surprised that this snow is accumulating. Seems we've got about 1/2" here over the past two hours. Yeah it's pretty nice snow given the radar. Less than one mile vis. For people worrying about how things look now, I don't believe this period was ever suppose to be that impressive. If you're getting 8", you might get 2-3" in these first 6 hours and the rest in a couple of hours near the end. Link to comment Share on other sites More sharing options...
Mallow Posted December 14, 2013 Share Posted December 14, 2013 Yeah it's pretty nice snow given the radar. Less than one mile vis. For people worrying about how things look now, I don't believe this period was ever suppose to be that impressive. If you're getting 8", you might get 2-3" in these first 6 hours and the rest in a couple of hours near the end. Exactly. It's all about the stuff that's over southern Indiana, southwest Ohio, and northern Kentucky right now. Link to comment Share on other sites More sharing options...
pawatch Posted December 14, 2013 Share Posted December 14, 2013 Heavy - WX nice post!!! As mentioned still more snow to come. Link to comment Share on other sites More sharing options...
Mallow Posted December 14, 2013 Share Posted December 14, 2013 Hoping you're right - I would kill for TSSN! Last - and one of the few times I had it - was March 2011. I have yet to see thundersnow. I was asleep the only time it ever happened where I lived (in Seattle during a Puget Sound Convergence Zone snow squall) Link to comment Share on other sites More sharing options...
canderson Posted December 14, 2013 Share Posted December 14, 2013 We are on the threshold of a light dusting on some metal surfaces and grassy areas here. Link to comment Share on other sites More sharing options...
Mforty Posted December 14, 2013 Share Posted December 14, 2013 Decided to make the trip from Wilmington de to Waynesboro this morning... At 9:30 this morning about 20 miles east of Frederick md on I-70 is where we first saw snow. Link to comment Share on other sites More sharing options...
Itunis Posted December 14, 2013 Share Posted December 14, 2013 I have yet to see thundersnow. I was asleep the only time it ever happened where I lived (in Seattle during a Puget Sound Convergence Zone snow squall) I distinctly remember hearing it in March '09 and I think one other time, back in N. GA. It's neat, and really freaks out people (and dogs!). Snow might have lightened a bit here, but still gradually accumulating. Link to comment Share on other sites More sharing options...
JamieOber Posted December 14, 2013 Share Posted December 14, 2013 1.3 as of 11 am here in Port Matilda. Link to comment Share on other sites More sharing options...
EasternUSWX Posted December 14, 2013 Share Posted December 14, 2013 In Greencastle? I can tell you that temps and rates just east of you in Waynesboro are not good. Nothing is sticking, and temps at my house are at 33.4F. That would be odd considering weather usually isn't much different between those two locations. Is there a heater on there or something? lol Just about 2" here. Link to comment Share on other sites More sharing options...
heavy_wx Posted December 14, 2013 Share Posted December 14, 2013 I'm not that confident we'll have thundersnow. The dynamics for this event are pretty good but they are not extreme like those you would see with strong cyclogenesis. I guess it's a possiblity. Keep an eye out for graupel though, which indicates the potential for charge separation within the cloud. It's definitely a cool thing to experience; I've seen it several times with lake-effect. Link to comment Share on other sites More sharing options...
canderson Posted December 14, 2013 Share Posted December 14, 2013 I have yet to see thundersnow. I was asleep the only time it ever happened where I lived (in Seattle during a Puget Sound Convergence Zone snow squall)We had it in that October 2009 or 2010 storm, Cantore caught in live on air. It was hilarious. Link to comment Share on other sites More sharing options...
paxpatriot Posted December 14, 2013 Share Posted December 14, 2013 Is there a heater on there or something? lol Just about 2" here. Like I said, weird sauce. As I type this, not even a flurry in the air. The fact that you have two inches not 9 miles from where I sit boggles the mind. Link to comment Share on other sites More sharing options...
EasternUSWX Posted December 14, 2013 Share Posted December 14, 2013 Radar is rapidly filling in to the SW. May only lull for 30mins then the real fun begins. Link to comment Share on other sites More sharing options...
JamieOber Posted December 14, 2013 Share Posted December 14, 2013 At this stage this is a VERY nebulous radar. Stuff's popping up and dying and popping up and dying. Probably not real good to judge too much at radar trends either way until mid-afternoon. Link to comment Share on other sites More sharing options...
Laurel Highlands Wx Posted December 14, 2013 Share Posted December 14, 2013 Just about 1.5 here in Northern Cambria. Link to comment Share on other sites More sharing options...
EasternUSWX Posted December 14, 2013 Share Posted December 14, 2013 Like I said, weird sauce. As I type this, not even a flurry in the air. The fact that you have two inches not 6 miles from where I sit boggles the mind. Guess that went for last Sunday's event too where I had 4" and Hagerstown had like 7". Few miles matter sometimes. Link to comment Share on other sites More sharing options...
Laurel Highlands Wx Posted December 14, 2013 Share Posted December 14, 2013 At this stage this is a VERY nebulous radar. Stuff's popping up and dying and popping up and dying. Probably not real good to judge too much at radar trends either way until mid-afternoon. Very strange indeed. I don't ever remember seeing a radar look like this during a snow storm. Link to comment Share on other sites More sharing options...
paxpatriot Posted December 14, 2013 Share Posted December 14, 2013 Guess that went for last Sunday's event too where I had 4" and Hagerstown had like 7". Few miles matter sometimes. Ha, yeah, I'd like to complain, but we did extremely well here in the last two storms. Plus, this won't be getting me any time off work tomorrow, so no great loss either way! Link to comment Share on other sites More sharing options...
Cashtown_Coop Posted December 14, 2013 Share Posted December 14, 2013 0.6" so far. Very light snow 28 Cashtown Link to comment Share on other sites More sharing options...
daxx Posted December 14, 2013 Share Posted December 14, 2013 The radar is looking much better to our southwest. Lets get the thump in here before the changeover! Link to comment Share on other sites More sharing options...
NortheastPAWx Posted December 14, 2013 Author Share Posted December 14, 2013 I'm not that confident we'll have thundersnow. The dynamics for this event are pretty good but they are not extreme like those you would see with strong cyclogenesis. I guess it's a possiblity. Keep an eye out for graupel though, which indicates the potential for charge separation within the cloud. It's definitely a cool thing to experience; I've seen it several times with lake-effect. March 2011 was amazing - that storm went rain to sleet to very heavy snow - got 4-5" in 3 hours, with the thundersnow hitting as soon as it flipped to all snow. That was back at home - and I also distinctly remember the HRRR nailing that band. Link to comment Share on other sites More sharing options...
JamieOber Posted December 14, 2013 Share Posted December 14, 2013 I'm not that confident we'll have thundersnow. The dynamics for this event are pretty good but they are not extreme like those you would see with strong cyclogenesis. I guess it's a possiblity. Keep an eye out for graupel though, which indicates the potential for charge separation within the cloud. It's definitely a cool thing to experience; I've seen it several times with lake-effect. That's what I saw this am. Graupel mixed with the flakes. First time I've seen it is Blizzard of 83, then during an intense cold frontal passage in like 84 or 85, then during the Superstorm. Also saw it during the early Jan 1994 storm. I also have seen it several times with frontal passages. The most amazing was in Jan 2003, half hour that looked like blizzard crossed with a severe t-storm. Mallow should have seen that. Link to comment Share on other sites More sharing options...
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