On Mon, 06 Feb 2017 09:36:04 +0000, Dave Liquorice wrote:

> On Sun, 5 Feb 2017 23:36:16 -0000 (UTC), Martin Gregorie wrote:
>
>>> http://www.howhill.com/images/timelapse/20140701.mp4
>>>
>>> This is from before the average level checking so it's the whole
> 0000
>>> to 2359 day squeezed into 1'55".n be found...
>>
>> Fabulous sky! Have you any idea what the windspeed was? Its difficult
>> to tell how strong the wind was with the timelapse, but the cloud
>> development makes it look like a very interesting soaring day indeed.
>
> http://www.howhill.com/weather/view.php?t=a&y=2014&m=07
>
> All of July, rather than just the 1st, which looks like it was just
> short of 20 C and only F2 to F3 gusting just over 10 mph, so very little
> wind chill. It would have been a calm, warm and pleasant day.
>
Yes, agreed, though sometimes somewhat different weather can be rather
good too. Wind up to 25kts/30mph at flying height is OK - beyond that the
wind tends to break up thermals. Some of the best flying days have been
those in May with a moderate (10-15kt) cold northerly and not much cloud,
so plenty of strong sun heating the ground. This makes for an unstable
airmass and plenty of thermals, but these conditions were a lot more
common in the naughties.


--
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |

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