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#1
February 25th 05, 12:01 PM
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[WR] S.Essex . Continuous snow and scientific measurement.
Well, more scientific than some! It has been snowing more or less
continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave |
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#2
February 25th 05, 12:12 PM
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[WR] S.Essex . Continuous snow and scientific measurement.
Dave.C wrote:
Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Interesting. I noticed that when the snow was cold dry and fluffy, but settling on ground that hadn't seen a frost for a while, it wouldn't settle, even when the air temperature was near zero. But, after a frost (-2c) even wet sloppy snow had no problems settling at all. -- Chris www.ivy-house.net Swaffham, Norfolk |
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#3
February 25th 05, 12:12 PM
posted to uk.sci.weather
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[WR] S.Essex . Continuous snow and scientific measurement.
Dave.C wrote:
Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Interesting. I noticed that when the snow was cold dry and fluffy, but settling on ground that hadn't seen a frost for a while, it wouldn't settle, even when the air temperature was near zero. But, after a frost (-2c) even wet sloppy snow had no problems settling at all. -- Chris www.ivy-house.net Swaffham, Norfolk |
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#4
February 25th 05, 12:12 PM
posted to uk.sci.weather
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[WR] S.Essex . Continuous snow and scientific measurement.
Dave.C wrote:
Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Interesting. I noticed that when the snow was cold dry and fluffy, but settling on ground that hadn't seen a frost for a while, it wouldn't settle, even when the air temperature was near zero. But, after a frost (-2c) even wet sloppy snow had no problems settling at all. -- Chris www.ivy-house.net Swaffham, Norfolk |
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#5
February 25th 05, 12:12 PM
posted to uk.sci.weather
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[WR] S.Essex . Continuous snow and scientific measurement.
Dave.C wrote:
Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Interesting. I noticed that when the snow was cold dry and fluffy, but settling on ground that hadn't seen a frost for a while, it wouldn't settle, even when the air temperature was near zero. But, after a frost (-2c) even wet sloppy snow had no problems settling at all. -- Chris www.ivy-house.net Swaffham, Norfolk |
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#6
February 25th 05, 08:50 PM
posted to uk.sci.weather
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S.Essex . Continuous snow and scientific measurement.
Dave.C wrote: Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Dave It's the vegetation that's giving it away as far as I'm concerned. Daffodils mid-Jan, crocuses, sound of lawnmowers everywhere- could easily be mistaken for April. Even in other mild-winter years I don't recall seeing anything like that. February 94 we got a decent amount of snow here in a similar setup after a mild Jan, (but that followed a very cold, frosty autumn- did this get the soil cold enough to counter January?) I've noticed that even when it's got down to -2 or -3 the ground has barely frozen, frost has covered the grass but it's not been hard underfoot. Your 1cm temp would explain why. Cars however have iced easily. Edmund |
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#7
February 25th 05, 08:50 PM
posted to uk.sci.weather
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S.Essex . Continuous snow and scientific measurement.
Dave.C wrote: Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Dave It's the vegetation that's giving it away as far as I'm concerned. Daffodils mid-Jan, crocuses, sound of lawnmowers everywhere- could easily be mistaken for April. Even in other mild-winter years I don't recall seeing anything like that. February 94 we got a decent amount of snow here in a similar setup after a mild Jan, (but that followed a very cold, frosty autumn- did this get the soil cold enough to counter January?) I've noticed that even when it's got down to -2 or -3 the ground has barely frozen, frost has covered the grass but it's not been hard underfoot. Your 1cm temp would explain why. Cars however have iced easily. Edmund |
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#8
February 25th 05, 08:50 PM
posted to uk.sci.weather
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S.Essex . Continuous snow and scientific measurement.
Dave.C wrote: Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Dave It's the vegetation that's giving it away as far as I'm concerned. Daffodils mid-Jan, crocuses, sound of lawnmowers everywhere- could easily be mistaken for April. Even in other mild-winter years I don't recall seeing anything like that. February 94 we got a decent amount of snow here in a similar setup after a mild Jan, (but that followed a very cold, frosty autumn- did this get the soil cold enough to counter January?) I've noticed that even when it's got down to -2 or -3 the ground has barely frozen, frost has covered the grass but it's not been hard underfoot. Your 1cm temp would explain why. Cars however have iced easily. Edmund |
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#9
February 25th 05, 08:50 PM
posted to uk.sci.weather
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S.Essex . Continuous snow and scientific measurement.
Dave.C wrote: Well, more scientific than some! It has been snowing more or less continuously here this morning, often with reasonable intensity, certainly more than it would seem on the radar, but not settling. Overnight min was -0.8C and overnight did settle but has been melting during morning. 2 metre air temp is 1.3C as at 11.30 hrs. I have then taken a soil reading with an accurate mercury in glass thermometer at 1cm depth. Temperature was 2.4C. In my experience most other cold spells of this length would have produced enough overnight low temperatures for the ground, near to the surface, in the morning especially, to be colder than the air. Sufficient snow cover, given the amount of snow I have had, would then have built up, to prevent further melting. This is evidenced now by deeper patches still remaining. It's not rocket science, I know, but I am sure this is the biggest factor why the snow is not settling here rather than SST's too high (6C), too late in the year, too much solar radiation, air not cold enough and other much mooted theories. Dave Dave It's the vegetation that's giving it away as far as I'm concerned. Daffodils mid-Jan, crocuses, sound of lawnmowers everywhere- could easily be mistaken for April. Even in other mild-winter years I don't recall seeing anything like that. February 94 we got a decent amount of snow here in a similar setup after a mild Jan, (but that followed a very cold, frosty autumn- did this get the soil cold enough to counter January?) I've noticed that even when it's got down to -2 or -3 the ground has barely frozen, frost has covered the grass but it's not been hard underfoot. Your 1cm temp would explain why. Cars however have iced easily. Edmund |
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