https://www.bbc.co.uk/weather/108410
At 24.7 degrees N and presumably in a built-up area there are 2c and 3c minima forecast. Seems very cool to me for a Saudi Arabian City, about 2000 feet asl.
A ground frost maybe? Is that where our winter has gone...……

Op dinsdag 7 januari 2020 09:17:26 UTC+1 schreef :
https://www.bbc.co.uk/weather/108410
At 24.7 degrees N and presumably in a built-up area there are 2c and 3c minima forecast. Seems very cool to me for a Saudi Arabian City, about 2000 feet asl.

Isn't it likely to be King Khalid Airport - 35 km from Riyadh ? https://en..wikipedia.org/wiki/King_...tional_Airport

https://tinyurl.com/yz8wa9ma - 6.0°C minimum on Monday night.

Quite cold nights at some other sites in Saudi Arabia as well https://tinyurl.com/yefxon5s

Colin Youngs
Brussels

In message ,
" writes
https://www.bbc.co.uk/weather/108410
At 24.7 degrees N and presumably in a built-up area there are 2c and
3c minima forecast. Seems very cool to me for a Saudi Arabian City,
about 2000 feet asl.
A ground frost maybe? Is that where our winter has gone...……

I know that in deserts it can get very chilly at night, presumably
because clear skies, little wind and low humidity means that heat can be
rapidly radiated out into space.
--
John Hall
"If you haven't got anything nice to say about anybody, come
sit next to me."
Alice Roosevelt Longworth (1884-1980)

Colin Youngs wrote:

Op dinsdag 7 januari 2020 09:17:26 UTC+1 schreef :
https://www.bbc.co.uk/weather/108410
At 24.7 degrees N and presumably in a built-up area there are 2c
and 3c minima forecast. Seems very cool to me for a Saudi Arabian
City, about 2000 feet asl.

Isn't it likely to be King Khalid Airport - 35 km from Riyadh ?
https://en.wikipedia.org/wiki/King_K...tional_Airport

https://tinyurl.com/yz8wa9ma - 6.0°C minimum on Monday night.

Quite cold nights at some other sites in Saudi Arabia as well
https://tinyurl.com/yefxon5s

Colin Youngs
Brussels

I recall one day in the 1970s when I was working in the Gulf one of the
SYNOPs from Riyadh Airport reported continuous moderate snow. I don't
know if that's something that happens there on rare occasions or
whether that particular event was a complete one-off.

There is also a photograph of a similar vintage taken in Bahrain that
shows a bush with icicles hanging from it as a result a sprinkler being
left on overnight on a rare occasion when there was a frost.

I also remember experiencing a 'white' Christmas Day in Abadan, at the
top end of the Gulf, not because of snow but because of a very heavy
hoar frost.

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
https://peakdistrictweather.org
twitter: @TideswellWeathr

The ave daily min temp in January there is 6.9C according to http://worldweather.wmo.int/en/city.html?cityId=216

I see that the MO is a little less chilly for Sun / Mon nights.

Places further north-west in Saudi Arabia apparently have means below 4C.

Julian