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what are the 5 UK weather stations?
Camborne
Heathrow
Hurn
Leeming
Leuchars
what are the 3 overseas weather stations?
Beijing
Jacksonville
Perth
to how many d.p.s is daily mean temperature?
1
daily total rainfall unit
mm
what does tr mean in daily total rainfall?
less than 0.05 mm
daily total sunshine unit
hours
daily maximum relative humidity unit
%
what are humidity values above 95% associated with?
mist and fog
daily mean windspeed unit
knots
how many mph is 1 knot?
1.15
daily mean wind direction unit
degrees relative to true North
and corresponding cardinal direction
what is daily mean wind direction rounded to?
nearest 10 degrees
what is the daily maximum gust direction?
direction wind was blowing in the hour the corresponding daily maximum gust occurred
daily maximum gust direction unit
degrees relative to true North
and cardinal direction
what is cloud cover?
fraction of celestial dome covered by cloud
cloud cover unit
okta (eighth of celestial dome)
visibility unit
decametres (Dm)
what is unavailable visibility data indicated by?
-
pressure unit
hectopascals hPa
equivalent to bar or 1,000 millibars
2015 windspeed range in Heathrow
3-19 knots
what would you expect in Jacksonville?
high temp
more rainfall than UK
moderate windspeeds
what would you expect in Beijing?
lower avg temp than Jacksonville
more variation in temp
Liz Truss opening up new pork markets
what would you expect in Perth?
reversed seasons to others
high windspeeds
what months does the LDS cover?
May to October
which two years does the LDS cover?
1987 and 2015
how is daily mean temp calculated?
the average of hourly readings over a 24-hour period
what is daily total sunshine rounded to?
nearest tenth of an hour
what scale categorises mean windspeed?
Beaufort scale
how many steps on the Beaufort scale
give an example of a Beaufort classification with a descriptive term and avg windspeed?
4
moderate
11 to 16 knots
what is a knot also called?
nautical mile an hour
what is visibility?
greatest horizontal distance at which an object can be seen in daylight
what value do you use for trace rainfall?
0.025 mm
when was the storm of 1987?
15th to 16th October in UK
what areas did the 1987 storm affect?
south and south-east of England
what is the typical range of pressure?
995 to 1005 HPa