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What Is The Highest Temperature Snow Can Fall At?


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#1 Lightningboy

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Posted 07 January 2009 - 22:24

Ok this is something thats confused me for a while

What is the Highest temperature that snow can fall at?
someone tells me is 2c
someone else tells me its 3c
Ryan Sandown Isle of wight:

Days with Thunder: 3
Thunderstorms within 10 miles: 1
Last Thunderstorm witness: 25/3/10, A very good elevated storm for march many CG'S witnessed some very big, along with very loud thunder, torrential rain, small hail and very strong winds, Lasted for about 30-45 minutes maybe bit longer.
Days With Snow falling 13
Days with Snow lying 9


YNWA

#2 shuggee

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Posted 07 January 2009 - 22:33

TWS's answer in the other thread about temperature and drizzle gives you a good idea:

http://www.netweathe...s...t&p=1417869
Views expressed in my posts here on netweather are entirely personal.

#3 Lightningboy

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Posted 07 January 2009 - 22:35

ok thankyou :)
Ryan Sandown Isle of wight:

Days with Thunder: 3
Thunderstorms within 10 miles: 1
Last Thunderstorm witness: 25/3/10, A very good elevated storm for march many CG'S witnessed some very big, along with very loud thunder, torrential rain, small hail and very strong winds, Lasted for about 30-45 minutes maybe bit longer.
Days With Snow falling 13
Days with Snow lying 9


YNWA

#4 Dave J

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Posted 07 January 2009 - 22:37

Ok this is something thats confused me for a while

What is the Highest temperature that snow can fall at?
someone tells me is 2c
someone else tells me its 3c


Well it could theoretically snow with an air temperatures as high as 8C, but you would need a dew point of -23C (RH: 11%) and this is extremely unlikely! In reality it's more like around 4C as an absolute limit in the UK (which still requires a dew point of -8C) and is likely to occur in Spring when you get a cold northerly outbreak with strong sunshine able to heat the air at the surface very quickly drying it out - then a heavy shower with a strong downdraft passing over which will lead to very strong evaporative cooling occurring reducing the air temperature to the wet bulb temperature (in this case around 0C) and snow to fall to the surface.

Edit - what TWS said basically. :)

Edited by Dave J, 07 January 2009 - 22:37 .

With every high there is always a low. Just remember in those lows to stay strong and move along.

#5 Lightningboy

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Posted 07 January 2009 - 22:41

thankyou for the help,
sounds interesting
Ryan Sandown Isle of wight:

Days with Thunder: 3
Thunderstorms within 10 miles: 1
Last Thunderstorm witness: 25/3/10, A very good elevated storm for march many CG'S witnessed some very big, along with very loud thunder, torrential rain, small hail and very strong winds, Lasted for about 30-45 minutes maybe bit longer.
Days With Snow falling 13
Days with Snow lying 9


YNWA