Hoth Posted December 12, 2017 Share Posted December 12, 2017 12 minutes ago, moneypitmike said: Just measured 3.25" of man snow. Temp rising steadily. 29.4". Pit 2? Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 Just now, ORH_wxman said: That won't do much to the snow pack though at least...your wetbulb should really be above about 36-37 to get melting accelerating beyond a very slow drip. Don’t water molecules start to take on a hexagonal arrangement around +3C or +4C? I thought I remember learning that in chemistry. Maybe that explains the 37Fish cutoff as to when the pack starts to get obliterated. Link to comment Share on other sites More sharing options...
HIPPYVALLEY Posted December 12, 2017 Share Posted December 12, 2017 Fun morning, even if it does change to drizzle. Link to comment Share on other sites More sharing options...
dryslot Posted December 12, 2017 Share Posted December 12, 2017 Ha, CAD fail on the models ASUS41 KGYX 121705 RWRGYX WEATHER ROUNDUP FOR MAINE AND NEW HAMPSHIRE NATIONAL WEATHER SERVICE GRAY ME 1200 PM EST TUE DEC 12 2017 MEZ002-005-006-010-012-015-018-020-021-024-026-027-029-121800- MAINE CITY SKY/WX TMP DP RH WIND PRES REMARKS PORTLAND LGT SNOW 23 20 88 VRB6 29.71F VSB 3/4 SANFORD LGT SNOW 22 20 92 N8 29.68F FOG BAR HARBOR FLURRIES 28 26 92 NE8 29.79F WISCASSET LGT SNOW 22 19 89 VRB3 29.74F FOG ROCKLAND CLOUDY 30 28 92 NE9 29.74F FRYEBURG SNOW 19 17 92 N6 29.71F VSB 1/2 LEWISTONAUBURN LGT SNOW 17 15 92 N13 29.72F VSB 3/4 WCI 4 AUGUSTA LGT SNOW 17 13 84 N10 29.74F VSB 3/4 WCI 5 WATERVILLE LGT SNOW 16 12 86 NE9 29.72F FOG BANGOR LGT SNOW 19 16 88 NW10 29.82F VSB 3/4 WCI 7 GREENVILLE N/A 15 13 91 E7 29.71F MILLINOCKET SNOW 12 8 84 N6 29.84F VSB 1/4 HOULTON LGT SNOW 14 11 87 NE6 29.86F VSB 3/4 PRESQUE ISLE SNOW 9 5 84 NE6 29.90F VSB 1/2 FRENCHVILLE LGT SNOW 6 2 83 E8 29.87F VSB 3/4 CARIBOU LGT SNOW 11 5 77 NE6 29.88F VSB 3/4 $$ Link to comment Share on other sites More sharing options...
ORH_wxman Posted December 12, 2017 Share Posted December 12, 2017 1 minute ago, dendrite said: Don’t water molecules start to take on a hexagonal arrangement around +3C or +4C? I thought I remember learning that in chemistry. Maybe that explains the 37Fish cutoff as to when the pack starts to get obliterated. Yeah the crystal structure changes...I'm not a total expert on the actual physics of why, but I know that wetbulb temp typically works really well. Walt Drag used to use that benchmark too when talking any snow melt into rivers/streams. It's why we don't really fear those 44/21 days...the wetbulb isn't that high on those days so the snow melts slowly....but we really hate the 44/44 rainstorms. Link to comment Share on other sites More sharing options...
CoastalWx Posted December 12, 2017 Share Posted December 12, 2017 Good stuff in the far interior and NNE. Jealous, but nice to see the old proverbs of CAD come to life. As we have see hundreds of times. Link to comment Share on other sites More sharing options...
wx2fish Posted December 12, 2017 Share Posted December 12, 2017 Looks like the ZR is making it close to MHT on the traffic cams. Still below freezing down through Salem/Haverhill for now. Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 Back to 1/4SM-1/2SM with big growth. Probably an inch per hour rate...if we could just sustain this for a few hours... Link to comment Share on other sites More sharing options...
WxBlue Posted December 12, 2017 Share Posted December 12, 2017 Rain/snow line pretty much locking onto MA/NH border for now. DAW/PSM still in mid 20s with light to moderate snowfall rate. Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 Just now, WxBlue said: Rain/snow line pretty much locking onto MA/NH border for now. DAW/PSM still in mid 20s with light to moderate snowfall rate. It’s made it past Salem and Derry on the RWIS sites. I can’t tell if it’s made it back to ASH yet...vis is up to 1 1/2SM there despite the -SN. Maybe some mixing? I’m hoping to slide that max column 0C just to my SE this afternoon. Link to comment Share on other sites More sharing options...
HIPPYVALLEY Posted December 12, 2017 Share Posted December 12, 2017 Up to 34° but just plastering right now. Hold off the sleet for another half hour and I'll break 4" Link to comment Share on other sites More sharing options...
WxBlue Posted December 12, 2017 Share Posted December 12, 2017 1 minute ago, dendrite said: It’s made it past Salem and Derry on the RWIS sites. I can’t tell if it’s made it back to ASH yet...vis is up to 1 1/2SM there despite the -SN. Maybe some mixing? I’m hoping to slide that max column 0C just to my SE this afternoon. Also got report of rain falling in Hampton per co-worker, but that was a hour ago. Warm air surge is barely moving north. Link to comment Share on other sites More sharing options...
wx2fish Posted December 12, 2017 Share Posted December 12, 2017 Just now, dendrite said: It’s made it past Salem and Derry on the RWIS sites. I can’t tell if it’s made it back to ASH yet...vis is up to 1 1/2SM there despite the -SN. Maybe some mixing? I’m hoping to slide that max column 0C just to my SE this afternoon. Coworker said it flipped in Auburn a few minutes ago Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 Just now, wx2fish said: Coworker said it flipped in Auburn a few minutes ago My mom texted me 30 secs ago that the snow just suddenly let up in S Hooksett near the Auburn line. Link to comment Share on other sites More sharing options...
WxBlue Posted December 12, 2017 Share Posted December 12, 2017 Trying to time my lunch break close to the flip so I can measure the new snow. Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 1 minute ago, WxBlue said: Trying to time my lunch break close to the flip so I can measure the new snow. Link to comment Share on other sites More sharing options...
wx2fish Posted December 12, 2017 Share Posted December 12, 2017 2 minutes ago, dendrite said: My mom texted me 30 secs ago that the snow just suddenly let up in S Hooksett near the Auburn line. Definitely a sneaky layer just off the deck despite how well were doing at the surface. Ive been inching up at home but still 29.4F Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 -RAPL at MHT now. Although it’s 29F so it should be -FZRAPL. Link to comment Share on other sites More sharing options...
MarkO Posted December 12, 2017 Share Posted December 12, 2017 Still holding out at 32.4. The water drops hanging on the trees has that unique look as if it's almost frozen. I believe it was 9 years ago today when it had that same look, except I was on the other side of 32. So close to accretion right now. I actually have it accreting on my north facing concrete steps. As for the pack loss, it's really only gaining density. The ice patches in my driveway are still there. As for water at 4 deg C: "These effects are due to the reduction of thermal motion with cooling, which allows water molecules to form more hydrogen bonds that prevent the molecules from coming close to each other.[33] While below 4 °C the breakage of hydrogen bonds due to heating allows water molecules to pack closer despite the increase in the thermal motion (which tends to expand a liquid), above 4 °C water expands as the temperature increases.[33]Water near the boiling point is about 4% less dense than water at 4 °C (39 °F).[35][e]" Link to comment Share on other sites More sharing options...
alex Posted December 12, 2017 Share Posted December 12, 2017 It's been ripping all day here; P&C gives an additional 3-7 today, 3-7 overnight and 1-3 tomorrow. Great system for us... Link to comment Share on other sites More sharing options...
WxBlue Posted December 12, 2017 Share Posted December 12, 2017 PSM flipped to freezing rain. Link to comment Share on other sites More sharing options...
dendrite Posted December 12, 2017 Share Posted December 12, 2017 Yup...this is our low/mid level warm push. The overperforming CAD obviously helps less and less the higher you go. It’ll be a close call here on the afternoon QPF. Link to comment Share on other sites More sharing options...
tamarack Posted December 12, 2017 Share Posted December 12, 2017 31 minutes ago, Lava Rock said: maybe 1". 17F About the same in Augusta, with identical temp (at noon), and now back to teeny flakelets. Maybe Chris's qpf caution was right. Unless those upstream echoes bulk up, I doubt my place will reach warning criteria unless ratios are north of 15:1. As long as it's all frozen, I won't complain. Link to comment Share on other sites More sharing options...
HIPPYVALLEY Posted December 12, 2017 Share Posted December 12, 2017 We meh' our way to 4". BOX forecast from last night was pretty spot on. Link to comment Share on other sites More sharing options...
Ginx snewx Posted December 12, 2017 Share Posted December 12, 2017 2 minutes ago, HIPPYVALLEY said: We meh' our way to 4". BOX forecast from last night was pretty spot on. MPM should be tarred and feathered Link to comment Share on other sites More sharing options...
dryslot Posted December 12, 2017 Share Posted December 12, 2017 20 minutes ago, WxBlue said: Trying to time my lunch break close to the flip so I can measure the new snow. Fast learner............. Link to comment Share on other sites More sharing options...
mahk_webstah Posted December 12, 2017 Share Posted December 12, 2017 23 minutes ago, dendrite said: It’s made it past Salem and Derry on the RWIS sites. I can’t tell if it’s made it back to ASH yet...vis is up to 1 1/2SM there despite the -SN. Maybe some mixing? I’m hoping to slide that max column 0C just to my SE this afternoon. Its a race, with the good echoes to our west. An area of weaker returns in sw nh but so far we keep redeveloping returns to our s and ssw that come over us. Would be nice to get into a steady period of heavy snow again. 7" on the ground here so I'm thinking I'm at 4 or a bit more now. Link to comment Share on other sites More sharing options...
radarman Posted December 12, 2017 Share Posted December 12, 2017 6 minutes ago, HIPPYVALLEY said: We meh' our way to 4". BOX forecast from last night was pretty spot on. Not close to 4" in Amherst, but we are back to mostly snow again in the better lift, after a period of rain earlier. Very little PL. Link to comment Share on other sites More sharing options...
mahk_webstah Posted December 12, 2017 Share Posted December 12, 2017 16 minutes ago, dendrite said: -RAPL at MHT now. Although it’s 29F so it should be -FZRAPL. lighter echoes allowed the warming to come easier? would heavy s?now hold it off a bit Link to comment Share on other sites More sharing options...
WxBlue Posted December 12, 2017 Share Posted December 12, 2017 1 minute ago, dryslot said: Fast learner............. I don't think I ever measured on top of old snow pack before thankfully, there's a spot where my board was where I can measure the new snow. Link to comment Share on other sites More sharing options...
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