On 18 July, 19:14, Tudor Hughes wrote:
* * Have a look at this:

* * * * * * * * *http://weather.noaa.gov/weather/current/SAWH.html

Ushuaia (the most southerly town in the world) is on the the south
coast of Tierra del Fuego with mountains to the north. *This is a warm
airstream, but even so......
* * * * *There appears to be an error in the recent dewpoints, which I
think should be negative. *The whole thing may be an error but I don't
think so.
* * * * The July mean is 1°C and normal weather is wind and sleet.

Tudor Hughes, Warlingham, Surrey.

Guess you have seen what has happened since? Midnight last night
(19th) temp 15 dew pt -5 with NW wind now just 18 hours later -0.1
snowing and a 20kt SW'ly. Back to normal now!