Baroclinic Zone Posted October 13, 2012 Share Posted October 13, 2012 Well OWD is in a valley. I know where it is, it's a radiating mecca so the low temps are accurate. Same as KTAN. As far as the high temps go, they seem ok to me. I never noticed them as being too hot. There is a subtle ridge line just to the nw of that owd that likely aids in downsloping and the neponset river valley is what allows it to radiate. Ktan is similar with a subtle ridge to its nw as well as the taunton river and surrounding bogs. 25f was my low Link to comment Share on other sites More sharing options...
Mr Torchey Posted October 13, 2012 Share Posted October 13, 2012 Down to 34 this morning. The grass did not appear to be frosted in my neighborhood, though cars and roofs of houses were covered in it. I'm sure it was AOB 32 north of route 1 away from the water. And, I didn't close my windows - I like it cold. His fascination with you is very creepy, who checks meso net stations two states away? Perhaps Tim should move to Fairfield County, he is obsessed with this part of the world. Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 About 35º now. I'm actually a few miles form Union. Anyone know where the station is there? There are spots in Union above 1000' and some valleys a few hundred feet lower. It's actually a sensor I have out in my sugarbush off Stickney Hill Rd. It's about 50-75' from the top of the hill so it radiates well at the beginning of the night and then slows down. I've attached a map showing where it is....it's the dot on the right. The one on the left is where it connects to the Internet. Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 Looks like 25° was my low. Lots of frost out there. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 It's actually a sensor I have out in my sugarbush off Stickney Hill Rd. It's about 50-75' from the top of the hill so it radiates well at the beginning of the night and then slows down. I've attached a map showing where it is....it's the dot on the right. The one on the left is where it connects to the Internet. Is it an unshielded probe or something? The top of that hill doesn't look like it'd radiate well at all. Link to comment Share on other sites More sharing options...
wxmanmitch Posted October 13, 2012 Share Posted October 13, 2012 Had a low of 22.5° F. Heavy, heavy frost. Leaves are spontaneously falling off the trees now that the sun is up, even with no wind. Not sure what causes it, but it always happens the morning after a hard freeze. Link to comment Share on other sites More sharing options...
CoastalWx Posted October 13, 2012 Share Posted October 13, 2012 Had a low of 22.5° F. Heavy, heavy frost. Leaves are spontaneously falling off the trees now that the sun is up, even with no wind. Not sure what causes it, but it always happens the morning after a hard freeze. I love that. Just gently raining leaves. Link to comment Share on other sites More sharing options...
MBRI Posted October 13, 2012 Share Posted October 13, 2012 25.2 at 7:17 say's my station Link to comment Share on other sites More sharing options...
Logan11 Posted October 13, 2012 Share Posted October 13, 2012 19 was the low at my place and at what's his names place in the Glen. Had frost on my car this morning so at least skin temp was 32. Even the leftover drops from yesterday's rain were frozen. Link to comment Share on other sites More sharing options...
Baroclinic Zone Posted October 13, 2012 Share Posted October 13, 2012 Love the gently falling leaves with no wind's Link to comment Share on other sites More sharing options...
Logan11 Posted October 13, 2012 Share Posted October 13, 2012 That always used to happen with the catalpa trees that I had when living in the HV. They never got pretty..just dropped all at once after a hard freeze. Had a low of 22.5° F. Heavy, heavy frost. Leaves are spontaneously falling off the trees now that the sun is up, even with no wind. Not sure what causes it, but it always happens the morning after a hard freeze. Link to comment Share on other sites More sharing options...
radarman Posted October 13, 2012 Share Posted October 13, 2012 26.5 in Amherst for the low. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 Is it an unshielded probe or something? The top of that hill doesn't look like it'd radiate well at all. MADIS says it is too cold at night and too warm during the day. That indicates some shielding issues to me. Even if you have a passive shield you can see some error. http://weather.gladstonefamily.net/site/D8905 By comparison, here's mine with the fan aspiration. I actually run my fan at a slightly higher voltage than what Davis sets it at so that I get better accuracy and response. http://weather.gladstonefamily.net/site/C7324 If you are using a FARS up there then idk how to explain it. Link to comment Share on other sites More sharing options...
wxmanmitch Posted October 13, 2012 Share Posted October 13, 2012 I love that. Just gently raining leaves. So do I. We're not far from where we were at the onset of the October snow storm last year, meaning we're about 2 weeks ahead of last year. Leaves are about 55-60% down here. After tonight and tomorrow's rain, it'll likely be closer to 75%. Rick and Pete over on MRGland are reporting lows of 19° F. Link to comment Share on other sites More sharing options...
HIPPYVALLEY Posted October 13, 2012 Share Posted October 13, 2012 Hit 24F a little after 6am this morning imby. Some plants are done but amazingly many look like they survived now that the sun is up. Link to comment Share on other sites More sharing options...
dryslot Posted October 13, 2012 Share Posted October 13, 2012 Bottomed out here at 24.3F this am, Winds have kicked up out of the WNW gusting to 13 mph Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 Is it an unshielded probe or something? The top of that hill doesn't look like it'd radiate well at all. The sensor and probe are in a small shield (it has to stay dry) which isn't big enough because it suffers from solar issues during the day but that shouldn't matter at night. It's on a level spot on the northern slope. I'm not sure how well the contour detail or my dot shows where the sensor is, but that's where it is. Stickney Hill is the southern edge of nice bowl that is solidly about 1000' and is surrounded by 12-1300' hills. This map might give a bigger picture. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 The sensor and probe are in a small shield (it has to stay dry) which isn't big enough because it suffers from solar issues during the day but that shouldn't matter at night. It's on a level spot on the northern slope. I'm not sure how well the contour detail or my dot shows where the sensor is, but that's where it is. Stickney Hill is the southern edge of nice bowl that is solidly about 1000' and is surrounded by 12-1300' hills. This map might give a bigger picture. Well a small passive shield will radiate and suffer heat loss too. Then you have conduction issues with the temp probe. Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 MADIS says it is too cold at night and too warm during the day. That indicates some shielding issues to me. Even if you have a passive shield you can see some error. http://weather.glads....net/site/D8905 By comparison, here's mine with the fan aspiration. I actually run my fan at a slightly higher voltage than what Davis sets it at so that I get better accuracy and response. http://weather.glads....net/site/C7324 If you are using a FARS up there then idk how to explain it. No FARS up there, that's for sure. I have power issues already. It's a remote location that I have a small solar panel charging a battery to power a wireless router. I've thought about improving the shielding but in the end I'm only using it for me to know how conditions are for maple sap in the spring and not an ASOS quality station. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 btw...I'm not jumping on you and calling your data bad. I just like viewing home sites and analyzing the data and siting. It'd be interesting to see if the numbers came in closer to the MADIS analysis with a FARS. Those of us with home stations obviously do our best. It's nice having stations to fill in the gaps between ASOS/AWOS. What do you have out there for a "home brew"? I'm going to play around with some instrumentation in the coming months to make some supplemental sensors to my Davis. My long shot project is a forward scattering visibility sensor using IR LEDs, a fresnel lens, and a light-to-voltage receiver to measure scattered irradiance. Then I just need to determine an extinction coefficient and plug everything into the MOR vis equations to estimate visibility. It'll probably be 10000x harder than I made it sound. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 No FARS up there, that's for sure. I have power issues already. It's a remote location that I have a small solar panel charging a battery to power a wireless router. I've thought about improving the shielding but in the end I'm only using it for me to know how conditions are for maple sap in the spring and not an ASOS quality station. Are you good with electronics and hobby type instrumentation? If so I may PM you one of these days. Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 Well a small passive shield will radiate and suffer heat loss too. Then you have conduction issues with the temp probe. It's a $50 sensor from LaCrosse. That may be the case. lol I tested the unit before I deployed it up there against my NBS certified thermometer (out of curiosity) and it was off by less than a degree which I can compensate for in my script that retrieves that data but I'm not doing that. The average nighttime error is 0.6° which is pretty close to what I measured. Link to comment Share on other sites More sharing options...
CapturedNature Posted October 13, 2012 Share Posted October 13, 2012 btw...I'm not jumping on you and calling your data bad. I just like viewing home sites and analyzing the data and siting. It'd be interesting to see if the numbers came in closer to the MADIS analysis with a FARS. Those of us with home stations obviously do our best. It's nice having stations to fill in the gaps between ASOS/AWOS. What do you have out there for a "home brew"? I'm going to play around with some instrumentation in the coming months to make some supplemental sensors to my Davis. My long shot project is a forward scattering visibility sensor using IR LEDs, a fresnel lens, and a light-to-voltage receiver to measure scattered irradiance. Then I just need to determine an extinction coefficient and plug everything into the MOR vis equations to estimate visibility. It'll probably be 10000x harder than I made it sound. Are you good with electronics and hobby type instrumentation? If so I may PM you one of these days. I wish I was better but I can do something. I have old school weather instruments but I wanted to be able to see what the weather was at my house when I was away so I started looking at options. I saw the LaCrosse as a cheap way to get temperature/humidity and calculate the dewpoint. I retrieve the data from weatherdirect.com and then format it for WU and MADIS. Once I got it working, I worked on the setup for my sugarbush. It does fill in a gap and I hope the data helps at some level. I'd be interested your visibility sensor....I'm working on a similar project to measure snow depth using an ultrasonic sensor and I'm not having much luck but I have a month or so to work on it. Link to comment Share on other sites More sharing options...
ORH_wxman Posted October 13, 2012 Share Posted October 13, 2012 Record low for BDL at 27F breaks the old record of 28F....ORH missed theirs by a couple, but still earliest reading in the 20s since 1993. BOS with their earliest reading of 35F also since 1993. Pretty cold morning, even if a brief cold shot. Link to comment Share on other sites More sharing options...
It's Always Sunny Posted October 13, 2012 Share Posted October 13, 2012 KOWD hit 23 and KMQE hit 30. Nice radiation inversion this morning. Link to comment Share on other sites More sharing options...
dendrite Posted October 13, 2012 Share Posted October 13, 2012 I'd be interested your visibility sensor....I'm working on a similar project to measure snow depth using an ultrasonic sensor and I'm not having much luck but I have a month or so to work on it. I have my ultrasonic snow sensor running right now in my room. I'm running it via POE with some shielded cat5e. It's just a simple Parallax Ping))) sensor hooked up to a BASIC stamp. All I really need to do is make the mast to mount it and then calibrate the height to = 0. I'm going to temperature compensate the speed of sound equation using my Davis 2m FARS temp. Ideally I'd have an IR temp probe out there aimed at the ground and I'd take an average of the 2m and skin temp in an attempt to find the mean temp of the column of air being sampled, but that will have to wait for now. I'm already using an IR temp probe aiming upward to estimate nighttime cloud cover by measuring the "temperature" difference between clear sky and clouds. It works pretty well for low/middle clouds.Anyways, I'll probably house the Ping))) in an old Davis shield to protect it from the elements. I'm not sure it'll be accurate enough to give me new snowfall (tenths of an inch) since I will probably ditch outlying samples and use an averaged sampling rate of about 10 minutes, but it should be good enough for snow depth (whole inches). We'll see. Most of the enjoyment comes from just playing around with the instrumentation. If it actually works it's like the cherry on top. lol Link to comment Share on other sites More sharing options...
Mr Torchey Posted October 13, 2012 Share Posted October 13, 2012 Amazing what you can see on a one hour walk this time of year, from cars caked on ice to hearty October blooming montuak daisies to a wonderful sunrise over majestic LIS. May god bless all of you, and may god bless the 27 time World Champion NY Yankees Link to comment Share on other sites More sharing options...
snowman21 Posted October 13, 2012 Share Posted October 13, 2012 I have my ultrasonic snow sensor running right now in my room. I'm running it via POE with some shielded cat5e. It's just a simple Parallax Ping))) sensor hooked up to a BASIC stamp. All I really need to do is make the mast to mount it and then calibrate the height to = 0. I'm going to temperature compensate the speed of sound equation using my Davis 2m FARS temp. Ideally I'd have an IR temp probe out there aimed at the ground and I'd take an average of the 2m and skin temp in an attempt to find the mean temp of the column of air being sampled, but that will have to wait for now. I'm already using an IR temp probe aiming upward to estimate nighttime cloud cover by measuring the "temperature" difference between clear sky and clouds. It works pretty well for low/middle clouds. Anyways, I'll probably house the Ping))) in an old Davis shield to protect it from the elements. I'm not sure it'll be accurate enough to give me new snowfall (tenths of an inch) since I will probably ditch outlying samples and use an averaged sampling rate of about 10 minutes, but it should be good enough for snow depth (whole inches). We'll see. Most of the enjoyment comes from just playing around with the instrumentation. If it actually works it's like the cherry on top. lol Have you seen http://ccc.atmos.colostate.edu/pdfs/Brazenec_Thesis_ALL.pdf I think this was part of the initial exploration of automating snow measurements for ASOS and the precursor to WFO GRR's experimental snow depth sensor. Some of the compaction models might help in making your sensor more accurate for real time accumulation use. Link to comment Share on other sites More sharing options...
ORH_wxman Posted October 13, 2012 Share Posted October 13, 2012 On a side note, ORH yesterday put up their first -10 departure since June. Today should be the 2nd....maybe be awhile again after that. Link to comment Share on other sites More sharing options...
powderfreak Posted October 13, 2012 Share Posted October 13, 2012 Have you seen http://ccc.atmos.colostate.edu/pdfs/Brazenec_Thesis_ALL.pdf I think this was part of the initial exploration of automating snow measurements for ASOS and the precursor to WFO GRR's experimental snow depth sensor. Some of the compaction models might help in making your sensor more accurate for real time accumulation use. Awesome discussion! I want one on the mountain to watch snowfall remotely. How much might something like that cost? Anyone have any idea? I know they use them with good accuracy out west at spots like Alta, Utah. Link to comment Share on other sites More sharing options...
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