Baroclinic Zone Posted February 24, 2016 Share Posted February 24, 2016 47/44. Sping is in the air! Link to comment Share on other sites More sharing options...
ORH_wxman Posted February 24, 2016 Share Posted February 24, 2016 It's pretty much turning into an elevation deal now. CON is up to 34F. I'll probably creep up to 32.1F within an hour or 2. SW Merrimack County, up around 1400-1500', is still 29-30F so they have plenty of glazing to go. Yeah the higher terrain is definitely having a half decent glaze event. Link to comment Share on other sites More sharing options...
HoarfrostHubb Posted February 24, 2016 Share Posted February 24, 2016 Yeah the higher terrain is definitely having a half decent glaze event. Yeah. One of the nicer daytime events like this in a while. Haven't seen broken limbs but a lot of droopy boughs Link to comment Share on other sites More sharing options...
powderfreak Posted February 24, 2016 Share Posted February 24, 2016 Yeah the higher terrain is definitely having a half decent glaze event.Still 25F and pouring at 3000-4000ft up here. A solid half inch of ice so far. It just accumulated so fast at those temps and there's cloud droplets/drizzle to go with the sheets of ZR.30.5F at 1,500ft which is actually mostly sleet still from the 2,000ft+ thick subfreezing layer on the east slope. Link to comment Share on other sites More sharing options...
Lava Rock Posted February 24, 2016 Share Posted February 24, 2016 29.7F. Bring on the 50's tonite. Link to comment Share on other sites More sharing options...
dryslot Posted February 24, 2016 Share Posted February 24, 2016 0.8" of snow overnight, Lt glaze, Temp at 30°F Link to comment Share on other sites More sharing options...
Ginx snewx Posted February 24, 2016 Author Share Posted February 24, 2016 Wolcott CT 1000 ft Link to comment Share on other sites More sharing options...
Ginx snewx Posted February 24, 2016 Author Share Posted February 24, 2016 Yeah. One of the nicer daytime events like this in a while. Haven't seen broken limbs but a lot of droopy boughsunder? Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 Wolcott CT 1000 ft Solid quarter inch there. I'm guessing we have a lot of that going on at similar elevations. We have a report from 1800 feet in Alexandria of 1/4 inch, but on the other side of that ridge in Randolph at 1500 feet, it's 37 and rain with no ice. Fun times. Link to comment Share on other sites More sharing options...
CT Rain Posted February 24, 2016 Share Posted February 24, 2016 Solid quarter inch there. I'm guessing we have a lot of that going on at similar elevations. We have a report from 1800 feet in Alexandria of 1/4 inch, but on the other side of that ridge in Randolph at 1500 feet, it's 37 and rain with no ice. Fun times. Interesting - you don't take the maximum there? So it would be the average on both sides of the branch? Link to comment Share on other sites More sharing options...
Baroclinic Zone Posted February 24, 2016 Share Posted February 24, 2016 Slant-stick ice accretion measuring? Link to comment Share on other sites More sharing options...
Ginx snewx Posted February 24, 2016 Author Share Posted February 24, 2016 Solid quarter inch there. I'm guessing we have a lot of that going on at similar elevations. We have a report from 1800 feet in Alexandria of 1/4 inch, but on the other side of that ridge in Randolph at 1500 feet, it's 37 and rain with no ice. Fun times. Heard 26 was a mess ,more from Wolcott per Twitter Link to comment Share on other sites More sharing options...
Damage In Tolland Posted February 24, 2016 Share Posted February 24, 2016 Yeah saw those..that's a solid 1/2 inch of ice with damage. Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 Interesting - you don't take the maximum there? So it would be the average on both sides of the branch? Correct, because the wind favors upwind side accretion you take the average of the up and downwind measurements. Flat surface accumulation is different because there is no wind component assumed to factor in there. Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 Yeah saw those..that's a solid 1/2 inch of ice with damage. No, it's 1/4 inch but still solid damage. Actual impact power companies appear to care more about 1/3 than 1/2 inch amounts. So closer to 1/4 starts the damage cycle. Link to comment Share on other sites More sharing options...
dendrite Posted February 24, 2016 Share Posted February 24, 2016 Interesting - you don't take the maximum there? So it would be the average on both sides of the branch? Yeah...an average of each side... http://www.cocorahs.org/media/docs/Training_IceAccreation.pdf Link to comment Share on other sites More sharing options...
Damage In Tolland Posted February 24, 2016 Share Posted February 24, 2016 Been above 32 here since 8:00am .Ice melted off trees by 9:00 Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 Heard 26 was a mess ,more from Wolcott per Twitter That's good stuff, especially for this ice Our surface was just too marginal when the upper levels torched to get much FZRA at the surface. Our elevations have to be doing well though. Hard to get reports though. Link to comment Share on other sites More sharing options...
CT Rain Posted February 24, 2016 Share Posted February 24, 2016 No, it's 1/4 inch but still solid damage. Actual impact power companies appear to care more about 1/3 than 1/2 inch amounts. So closer to 1/4 starts the damage cycle. I'm surprised the warning criteria isn't 1/4" of accretion. That's a lot of ice! Please take all ice accretion reports I've posted here and sent to NWS over the last 20 years and divide by 2. Link to comment Share on other sites More sharing options...
ORH_wxman Posted February 24, 2016 Share Posted February 24, 2016 No, it's 1/4 inch but still solid damage. Actual impact power companies appear to care more about 1/3 than 1/2 inch amounts. So closer to 1/4 starts the damage cycle. My anecdotel evidence from years of ice storms at elevation in ORH supports the 1/4 inch line...usually get a few sporatic power outages at 1/4 inch but tends to increase rapidly once we're at 3/8" and half an inch is like a chain reaction that goes off. Link to comment Share on other sites More sharing options...
wxeyeNH Posted February 24, 2016 Share Posted February 24, 2016 31.8F cloudy awaiting the "real" rain Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 I'm surprised the warning criteria isn't 1/4" of accretion. That's a lot of ice! Please take all ice accretion reports I've posted here and sent to NWS over the last 20 years and divide by 2. I think a lot of people mess it up. We usually try and post the CoCoRaHS method to social media before we expect significant FZRA to remind our spotters. Of course like I said, it's only on lines or branches that you measure both sides and divide. If you measured your deck, car (hood not window), or other flat surface, it's just the total accretion because wind wasn't involved. Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 My anecdotel evidence from years of ice storms at elevation in ORH supports the 1/4 inch line...usually get a few sporatic power outages at 1/4 inch but tends to increase rapidly once we're at 3/8" and half an inch is like a chain reaction that goes off. Eversource power in NH basically confirmed that with Ekster. Got really worried about 1/3 inch, didn't much care whether we got to 1/2. So basically every time we go sub-warning, 1/4 to 1/2 it's their worst nightmare for impacts. Not much at 1/4, huge at 1/2. Link to comment Share on other sites More sharing options...
ORH_wxman Posted February 24, 2016 Share Posted February 24, 2016 Eversource power in NH basically confirmed that with Ekster. Got really worried about 1/3 inch, didn't much care whether we got to 1/2. So basically every time we go sub-warning, 1/4 to 1/2 it's their worst nightmare for impacts. Not much at 1/4, huge at 1/2. Yeah by the time you are at half an inch, it's already shotguns going off basically. That's what happened in 2008...we actually lost power (almost perfectly timed) right after I had gone on a weenie walk in the dark measuring the ice accretion on various branches and surfaces. I had around 3/8" at that point. Maybe slightly more. By the time we got another 2-3 hours into the storm, the shotguns started going off every 5 seconds or less...so I'd assume by that point we were over half an inch. Link to comment Share on other sites More sharing options...
Ginx snewx Posted February 24, 2016 Author Share Posted February 24, 2016 31.8F cloudy awaiting the "real" raintorrents of rain here at work in SECT Link to comment Share on other sites More sharing options...
CT Rain Posted February 24, 2016 Share Posted February 24, 2016 Yeah by the time you are at half an inch, it's already shotguns going off basically. That's what happened in 2008...we actually lost power (almost perfectly timed) right after I had gone on a weenie walk in the dark measuring the ice accretion on various branches and surfaces. I had around 3/8" at that point. Maybe slightly more. By the time we got another 2-3 hours into the storm, the shotguns started going off every 5 seconds or less...so I'd assume by that point we were over half an inch. What was the final accretion you had in ORH from that one? Link to comment Share on other sites More sharing options...
OceanStWx Posted February 24, 2016 Share Posted February 24, 2016 Yeah by the time you are at half an inch, it's already shotguns going off basically. That's what happened in 2008...we actually lost power (almost perfectly timed) right after I had gone on a weenie walk in the dark measuring the ice accretion on various branches and surfaces. I had around 3/8" at that point. Maybe slightly more. By the time we got another 2-3 hours into the storm, the shotguns started going off every 5 seconds or less...so I'd assume by that point we were over half an inch. Which makes it all the more ironic that we weren't able to verify the 2013 ice event up here because it wasn't widespread enough 1/2 inch reports, but we had basically all greater than 1/3 around here. Link to comment Share on other sites More sharing options...
ORH_wxman Posted February 24, 2016 Share Posted February 24, 2016 What was the final accretion you had in ORH from that one? It was between 1-1.25" Link to comment Share on other sites More sharing options...
ineedsnow Posted February 24, 2016 Share Posted February 24, 2016 Just got home from being in the boston area pike had sleet on grassy areas by exit 10 few little piles left here at home but not much else hope we get a good storm tonight Link to comment Share on other sites More sharing options...
tamarack Posted February 24, 2016 Share Posted February 24, 2016 I honestly feel like I experience more thunderstorms during the winter months as opposed to during the so called 'severe season' Unless it's vastly different there than here, it's a perception/anomaly thing. Days with thunder, 40 years of data from sites in northern, southern and western Maine: DJFM: 14 days with thunder, 2.5% of total MJJA: 467 days with thunder, 83% of total Augusta reporting freezing rain and 29 at 1 PM. Looks like no more than fzdz outside the office, 2 miles SE and 200' lower than the co-op site. No sign of accretion on trees and shrubs, though there might be 1/20" that I can't detect from inside. My anecdotel evidence from years of ice storms at elevation in ORH supports the 1/4 inch line...usually get a few sporatic power outages at 1/4 inch but tends to increase rapidly once we're at 3/8" and half an inch is like a chain reaction that goes off. Anecdotal evidence from a NNE forester (not me, though I agree) with 40+ years of experience: Serious damage begins as accretion (thickest side, not the average) reaches 20mm. Would probably translate to 0.4-0.5" when measured in the prescribed manner. In the 1998 event, I saw grass stems, frozen in vertical position, with diameters approaching 2.5" - soda-can size. Not sure how that would translate. Link to comment Share on other sites More sharing options...
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