Large Data Set

How many UK weather stations?

5

How many overseas weather stations?

3

What is the time span for the data?

May-Oct 1987

May-Oct 2015

Location of Leuchars

Eastern Scotland

Location of Leeming

North East

Location of Heathrow

London/central England

Location of Hurn

South Western coast

Location of Camborne

Cornwall

What did the great storm of 1987 effect?

Heathrow – more rainfall, stronger windspeed etc

Daily maximum temperature units

Degrees Celsius, 1dp

Daily total rainfall units

Millimetres

How much is trace rainfall and what to do with it?

<0.05mm, treated as 0

Daily total sunshine units

Hours, 1dp

Daily maximum relative humidity units

Percentage

Daily mean windspeed units (2)

Knots – 1kn = 1.15 mph

Beaufort scale – light/moderate/fresh

Daily maximum gust units

Knots

Daily mean wind direction units

Degrees relative to true north, nearest 10 degrees

Daily maximum gust direction units

Degrees relative to true north

Cloud cover units

Oktas – fraction of celestial dome covered by cloud 0-8

Visibility units

Decametres – 1dm=10m, measured horizontally

Pressure units

Hectopascals, nearest whole number

What is high pressure associated with?

Good weather

What is low pressure associated with?

Rain, cold, cloud etc

Range in Uk pressures

980-1040 hPa

Range in overseas pressures

1000-1040 hPa