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| uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#1
February 18th 06, 09:00 PM
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[WR] Exmoor
Travelling over Exmoor this evening, experienced a short but sharp shower
starting as rain turning to wet snow... |
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#2
February 18th 06, 09:44 PM
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[WR] Exmoor
" cupra" wrote in message ... Travelling over Exmoor this evening, experienced a short but sharp shower starting as rain turning to wet snow... Any idea what altitude? Will. -- |
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#3
February 18th 06, 09:47 PM
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[WR] Exmoor
Will Hand wrote:
" cupra" wrote in message ... Travelling over Exmoor this evening, experienced a short but sharp shower starting as rain turning to wet snow... Any idea what altitude? Will. Not sure - will have a look at a map..... (car sensor was showing +2.5DegC at the time) |
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#4
February 18th 06, 09:53 PM
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[WR] Exmoor
Will Hand wrote:
" cupra" wrote in message ... Travelling over Exmoor this evening, experienced a short but sharp shower starting as rain turning to wet snow... Any idea what altitude? Will. Appox 400m asl - between Challacombe and Simonsbath. |
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#5
February 18th 06, 10:14 PM
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[WR] Exmoor
" cupra" wrote in message ... Will Hand wrote: " cupra" wrote in message ... Travelling over Exmoor this evening, experienced a short but sharp shower starting as rain turning to wet snow... Any idea what altitude? Will. Appox 400m asl - between Challacombe and Simonsbath. Brilliant, many thanks! At 310m asl I am now recording +3.2 degC, so we have a lapse rate of circa 0.7 deg C/90 m. Which puts the zero deg isotherm at circa 600m asl. Given my relative humidity of 95% the wet-bulb freezing level will be around 550m asl. So any snow falling should immediately lie at that level with snow falling down to 400m asl as you observed. No change to forecast :-) Will. -- |
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#6
February 18th 06, 10:23 PM
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[WR] Exmoor
Will Hand wrote:
" cupra" wrote in message ... Will Hand wrote: " cupra" wrote in message ... Travelling over Exmoor this evening, experienced a short but sharp shower starting as rain turning to wet snow... Any idea what altitude? Will. Appox 400m asl - between Challacombe and Simonsbath. Brilliant, many thanks! At 310m asl I am now recording +3.2 degC, so we have a lapse rate of circa 0.7 deg C/90 m. Which puts the zero deg isotherm at circa 600m asl. Given my relative humidity of 95% the wet-bulb freezing level will be around 550m asl. So any snow falling should immediately lie at that level with snow falling down to 400m asl as you observed. No change to forecast :-) Will. Glad to assist! Had a look at the radar - looks like it was a firly short lived event (the stars were shining brightly a couple of miles down the road) |
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