tunafish Posted January 11, 2019 Share Posted January 11, 2019 My CoCoRaHS totals don't reflect storm totals. Maybe I'm doing it wrong. Measured 1.5" on both 1/8 & 1/9 after it stopped snowing each day. My CoCoRaHS reports for 1/7 was 1", 1/8 was .2", and 1/9 was .2" (as that was all that was left when I made my morning observation. I did not wipe my board.) So that PNS will show me at 1.4" when in reality my storm total was 3". Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 2:55 AM, tunafish said: My CoCoRaHS totals don't reflect storm totals. Maybe I'm doing it wrong. Measured 1.5" on both 1/8 & 1/9 after it stopped snowing each day. My CoCoRaHS reports for 1/7 was 1", 1/8 was .2", and 1/9 was .2" (as that was all that was left when I made my morning observation. I did not wipe my board.) So that PNS will show me at 1.4" when in reality my storm total was 3". Expand I'm not sure what the criteria guidelines are for CoCoRaHS reporting, I'm on the spotter network, But probably, Steve (Ginx snewx) Tom (Tamarack) or Brian (Dendrite) can help out here. Link to comment Share on other sites More sharing options...
backedgeapproaching Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 2:55 AM, tunafish said: My CoCoRaHS totals don't reflect storm totals. Maybe I'm doing it wrong. Measured 1.5" on both 1/8 & 1/9 after it stopped snowing each day. My CoCoRaHS reports for 1/7 was 1", 1/8 was .2", and 1/9 was .2" (as that was all that was left when I made my morning observation. I did not wipe my board.) So that PNS will show me at 1.4" when in reality my storm total was 3". Expand When did you measure the 1.5" each day. Are you saying you measured 1.5 at night on 1/8 and 1/9 and then it sublimated down to .2 each morning when you measured? Link to comment Share on other sites More sharing options...
tunafish Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:40 AM, dryslot said: I'm not sure what the criteria guidelines are for CoCoRaHS reporting, I'm on the spotter network, But probably, Steve (Ginx snewx) Tom (Tamarack) or Brian (Dendrite) can help out here. Expand Yeah I brought it up last week and those guys kindly replied. Basically said to take the once daily morning observation on CoCoRaHS as-is, compaction/melting and all. Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:44 AM, tunafish said: Yeah I brought it up last week and those guys kindly replied. Basically said to take the once daily morning observation so CoCoRaHS as-is, compaction/melting and all. Expand My guess is then you make a once daily like 6 or 7 am report time? Link to comment Share on other sites More sharing options...
tunafish Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:43 AM, backedgeapproaching said: When did you measure the 1.5" each day. Are you saying you measured 1.5 at night on 1/8 and 1/9 and then it sublimated down to .2 each morning when you measured? Expand Essentially, yes. I measured for my event total after snow stopped (or flipped to rain). It was mid-late morning on both days. So by 6AM the next day, it had melted down to .2. Fine for CoCoRaHS, misleading for the PNS that picks up my CoCoRaHS and reports it as an event total. Link to comment Share on other sites More sharing options...
tunafish Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:47 AM, dryslot said: My guess is then you make a once daily like 6 or 7 am report time? Expand Correct, for CoCoRaHS. If it's snowing and stops at 11AM, I take a measurement then, but dont report that to CoCoRaHS. That measurement is for my season total on wkevin and if I report via social media Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:49 AM, tunafish said: Correct, for CoCoRaHS. If it's snowing and stops at 11AM, I take a measurement then, but dont report that to CoCoRaHS. That measurement is for my season total on wkevin and if I report via social media Expand Hmm, In that case you can lose a lot from compaction, Melt or sublimation over that period depending on start and stop times for storm systems. Link to comment Share on other sites More sharing options...
backedgeapproaching Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:47 AM, tunafish said: Essentially, yes. I measured for my event total after snow stopped (or flipped to rsin). It was mid-late morning on both days. So by 6AM the next day, it had melted down to .2. Fine for CoCoRaHS, misleading for the PNS that picks up my CoCoRaHS and reports it as an event total. Expand Actually if you are home and can do it---you should measure the 1.5" before it flipped to rain mid morning and note the 1.5" and LE, then report that as new snow the next morning. So new snow would be 1.5 to cocorahs with the snow LE. Now if you not home and couldn't measure the 1.5" and then it rained and it was .2" when you got home, then you would report .2" From Cocorahs One of the difficulties with accurate and consistent snowfall measurement is related to the melting, settling, or evaporation of snow before you have a chance to measure it (especially in the Fall and Spring). Please try to do a measurement as close in time to when the storm ends as possible. Don't wait until 7AM if the snow ended the previous day. During long-duration snowfalls, you may choose to measure and clear the snowboard every six hours. The total snowfall would then be the summation of the different measurements Link to comment Share on other sites More sharing options...
backedgeapproaching Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:52 AM, dryslot said: Hmm, In that case you can lose a lot from compaction, Melt or sublimation over that period depending on start and stop times for storm systems. Expand Right, your not supposed to do it that way if you can help it. Seems like he was home and able to measure...so should have reported 1.5" Link to comment Share on other sites More sharing options...
tunafish Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:52 AM, dryslot said: Hmm, In that case you can lose a lot from compaction, Melt or sublimation over that period depending on start and stop times for storm systems. Expand For sure. That's my concern with the PNS picking up my CoCoRaHS. Doesn't reflect my true storm totals. On 1/11/2019 at 3:55 AM, backedgeapproaching said: Right, your not supposed to do it that way if you can help it. Seems like he was home and able to measure...so should have reported 1.5" Expand You're correct. I'm almost always available to measure as I work around the corner from home and have the flexibility to step out. That info you posted is super helpful, thank you! My first winter reporting through CoCoRaHS. Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:55 AM, backedgeapproaching said: Right, your not supposed to do it that way if you can help it. Seems like he was home and able to measure...so should have reported 1.5" Expand You and i are posting at the same time and i'm missing your post........lol, But i see the criteria you just posted and that's within reason. Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 I try to report every 6 hrs, Clear the board on that interval and report to the WFO, Or when the storm ends, I'm also reporting to local TV affiliates so have to get them totals before they go live with their reports. Link to comment Share on other sites More sharing options...
Ginx snewx Posted January 11, 2019 Share Posted January 11, 2019 Also on Cocorahs you can select a multi day accumulation Link to comment Share on other sites More sharing options...
backedgeapproaching Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:59 AM, tunafish said: For sure. That's my concern with the PNS picking up my CoCoRaHS. Doesn't reflect my true storm totals. You're correct. I'm almost always available to measure as I work around the corner from home and have the flexibility to step out. That info you posted is super helpful, thank you! My first winter reporting through CoCoRaHS. Expand No problem. You would definitely lose a good amount of snow(data and reporting wise)always waiting to 7am like Dryslot said. Nice that your able to go measure easily. Link to comment Share on other sites More sharing options...
J.Spin Posted January 11, 2019 Share Posted January 11, 2019 Event totals: 21.8” Snow/1.61” L.E. Details from the 11:00 P.M. Waterbury observations: New Snow: 1.8 inches New Liquid: 0.05 inches Snow/Water Ratio: 36.0 Snow Density: 2.8% H2O Temperature: 13.5 F Sky: Light Snow (1 to 10 mm flakes) Snow at the stake: 26.0 inches Link to comment Share on other sites More sharing options...
J.Spin Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:54 AM, backedgeapproaching said: Actually if you are home and can do it---you should measure the 1.5" before it flipped to rain mid morning and note the 1.5" and LE, then report that as new snow the next morning. So new snow would be 1.5 to cocorahs with the snow LE. Now if you not home and couldn't measure the 1.5" and then it rained and it was .2" when you got home, then you would report .2" From Cocorahs One of the difficulties with accurate and consistent snowfall measurement is related to the melting, settling, or evaporation of snow before you have a chance to measure it (especially in the Fall and Spring). Please try to do a measurement as close in time to when the storm ends as possible. Don't wait until 7AM if the snow ended the previous day. During long-duration snowfalls, you may choose to measure and clear the snowboard every six hours. The total snowfall would then be the summation of the different measurements Expand Backedge is right on here, as are the others in the conversation. You want to try to catch those “maximum” accumulations before any melting, and that’s what you report to CoCoRaHS. The peak of depth indicates what really happened and is a representation of the event, but if you don’t report that, it’s as if it never really happened. Since I can’t always be home due to work, travel, etc., that’s why I specifically set up my webcam with a close-in zoom on a measurement stick. I can check in on that to know if there was any melting, settling, or whatever. Here’s a shot from my webcam today when I was monitoring this storm while at work: Link to comment Share on other sites More sharing options...
tunafish Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 4:07 AM, dryslot said: I try to report every 6 hrs, Clear the board on that interval and report to the WFO, Or when the storm ends, I'm also reporting to local TV affiliates so have to get them totals before they go live with their reports. Expand Thanks, yeah I've been doing that as well although I think only one, maybe two events have gone longer than 6 hours this season lol Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 9:43 AM, tunafish said: Thanks, yeah I've been doing that as well although I think only one, maybe two events have gone longer than 6 hours this season lolHasn’t been very difficult so far as we haven’t had many events and none I would consider significant. Link to comment Share on other sites More sharing options...
J.Spin Posted January 11, 2019 Share Posted January 11, 2019 Event totals: 22.3” Snow/1.63” L.E. Details from the 6:00 A.M. Waterbury observations: New Snow: 0.5 inches New Liquid: 0.02 inches Snow/Water Ratio: 25.0 Snow Density: 4.0% H2O Temperature: 8.8 F Sky: Light Snow (1 to 3 mm flakes) Snow at the stake: 25.0 inches Link to comment Share on other sites More sharing options...
dryslot Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 1:06 PM, J.Spin said: Event totals: 22.3” Snow/1.63” L.E. Details from the 6:00 A.M. Waterbury observations: New Snow: 0.5 inches New Liquid: 0.02 inches Snow/Water Ratio: 25.0 Snow Density: 4.0% H2O Temperature: 8.8 F Sky: Light Snow (1 to 3 mm flakes) Snow at the stake: 25.0 inches Expand Nice event J up there, You guys have been raking. Link to comment Share on other sites More sharing options...
J.Spin Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 2:32 PM, dryslot said: Nice event J up there, You guys have been raking. Expand Yeah, this past storm was certainly a good extra boost. It’s actually been a while since we’ve had a decent January, but this one is doing well thus far - we’re only a third of the way through the month and this January already has seen more snowfall that any of the previous seven Januarys had in total. We’re not quite at 2007-2008 or 2008-2009 pace overall, but with this latest event this season seems like it wants to try to at least give them a run for their money. Link to comment Share on other sites More sharing options...
tamarack Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:54 AM, backedgeapproaching said: Actually if you are home and can do it---you should measure the 1.5" before it flipped to rain mid morning and note the 1.5" and LE, then report that as new snow the next morning. So new snow would be 1.5 to cocorahs with the snow LE. Now if you not home and couldn't measure the 1.5" and then it rained and it was .2" when you got home, then you would report .2" From Cocorahs One of the difficulties with accurate and consistent snowfall measurement is related to the melting, settling, or evaporation of snow before you have a chance to measure it (especially in the Fall and Spring). Please try to do a measurement as close in time to when the storm ends as possible. Don't wait until 7AM if the snow ended the previous day. During long-duration snowfalls, you may choose to measure and clear the snowboard every six hours. The total snowfall would then be the summation of the different measurements Expand That's the way to measure how much snow actually fell. However, if you enter the depth on the ground, that's as it stands at observation time. A crazy scenario- bare ground on, say, Dec. 10 at 7 AM. Later that morning a quick 2" falls, but by sunset it's gone. Then 3" new is on the board at the 7 AM obs time on 12/11. One would report 5" snowfall but 3" depth. If one captured LE for both the 2" and the 3", the sum would be entered. If it were me and I was unable to get the 2" LE but had the 3" LE, I'd not report LE at all. Link to comment Share on other sites More sharing options...
backedgeapproaching Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:36 PM, tamarack said: That's the way to measure how much snow actually fell. However, if you enter the depth on the ground, that's as it stands at observation time. A crazy scenario- bare ground on, say, Dec. 10 at 7 AM. Later that morning a quick 2" falls, but by sunset it's gone. Then 3" new is on the board at the 7 AM obs time on 12/11. One would report 5" snowfall but 3" depth. If one captured LE for both the 2" and the 3", the sum would be entered. If it were me and I was unable to get the 2" LE but had the 3" LE, I'd not report LE at all. Expand Right, its possible to get say 3" new snow and then it rains and at 7am you have 3" new and 0" depth. Regarding the bolded, I would only report the LE if I added a note in the observations notes section saying i only got the LE for 3" of the 5". Link to comment Share on other sites More sharing options...
powderfreak Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 3:26 PM, J.Spin said: Yeah, this past storm was certainly a good extra boost. It’s actually been a while since we’ve had a decent January, but this one is doing well thus far - we’re only a third of the way through the month and this January already has seen more snowfall that any of the previous seven Januarys had in total. We’re not quite at 2007-2008 or 2008-2009 pace overall, but with this latest event this season seems like it wants to try to at least give them a run for their money. Expand This added a good shot of QPF to the mountain... despite some great fluff during the second half, the high winds packed it a bit. I bet the mountain added a good 1.75-2.0" of liquid equivalent to the snowpack. As of Tuesday before the storm I had 26" and 6.5" of water at the 1,500ft elevation. Be interesting to see the total liquid in the pack during the next survey. That's a healthy refresher to finally get us off that ice crust from the cutters during the holidays. Link to comment Share on other sites More sharing options...
CoastalWx Posted January 11, 2019 Share Posted January 11, 2019 On 1/11/2019 at 11:13 PM, powderfreak said: This added a good shot of QPF to the mountain... despite some great fluff during the second half, the high winds packed it a bit. I bet the mountain added a good 1.75-2.0" of liquid equivalent to the snowpack. As of Tuesday before the storm I had 26" and 6.5" of water at the 1,500ft elevation. Be interesting to see the total liquid in the pack during the next survey. That's a healthy refresher to finally get us off that ice crust from the cutters during the holidays. Expand 26” there before? Wow. Link to comment Share on other sites More sharing options...
LongBeachSurfFreak Posted January 12, 2019 Share Posted January 12, 2019 On 1/11/2019 at 11:13 PM, powderfreak said: This added a good shot of QPF to the mountain... despite some great fluff during the second half, the high winds packed it a bit. I bet the mountain added a good 1.75-2.0" of liquid equivalent to the snowpack. As of Tuesday before the storm I had 26" and 6.5" of water at the 1,500ft elevation. Be interesting to see the total liquid in the pack during the next survey. That's a healthy refresher to finally get us off that ice crust from the cutters during the holidays. Expand That ice is the real problem, it’s like hitting cement. Happy that the mountains are back in good condition even if I’m not partaking for a while. The entire spine did well with this event. Link to comment Share on other sites More sharing options...
powderfreak Posted January 12, 2019 Share Posted January 12, 2019 On 1/11/2019 at 11:34 PM, CoastalWx said: 26” there before? Wow. Expand The snow banks up at the resort look like what 36-40" on the ground would look like now. Totally different world up there in that pocket. Great CAD on the 1,500ft bench on the east slope so the snow never melts and it gets a lot of precip. Such a weenie location the base area of the ski resort is. Link to comment Share on other sites More sharing options...
J.Spin Posted January 12, 2019 Share Posted January 12, 2019 Event totals: 22.5” Snow/1.64” L.E. The clouds have just about cleared out here now and the snow has stopped, so that closes the books on this storm and the numbers above represent the final storm totals. In terms of snowfall, this storm has now taken the top spot for this season at our location, beating out Winter Storm Bruce from the end of November. Details from the 6:00 P.M. Waterbury observations: New Snow: 0.2 inches New Liquid: 0.01 inches Snow/Water Ratio: 20.0 Snow Density: 5.0% H2O Temperature: -1.1 F Sky: Mostly Clear Snow at the stake: 24.0 inches Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.