Mid-latitude Climates. Marine West Coast Climate. UK Air Masses. Air mass types m = maritime, wet c = continental, dry P = polar, cold T = tropical, warm A mP cP mT cT. UK Weather.
Air mass types
m = maritime, wet
c = continental, dry
P = polar, cold
T = tropical, warm
Westerly Unsettled weather with variable wind directions as depressions cross the country. Mild and stormy in winter, generally cool and cloudy in summer (mP, mPw, mT).
NW Cool, changeable conditions. Strong winds and showers affect windward coasts especially, but the southern part of Britain may have dry, bright weather (mP, mA).
Northerly Cold weather at all seasons, often associated with polar lows. Snow and sleet showers in winter, especially in the north and east (mA).
Easterly Cold in the winter half-year, sometimes very severe weather in the south and east with snow or sleet. Warm in summer with dry weather in the west.\' Occasionally thundery (cA, cP).
Southerly Warm and thundery in summer. In winter it may be associated with a low in the Atlantic giving mild, damp weather especially in the south-west or with a high over central Europe, in which case it is cold and dry (mT or cT, summer; mT or cP, winter).
Cyclonic Rainy, unsettled conditions often accompanied by gales and thunderstorms. This type may refer either to the rapid passage of depressions across the country or to the persistence of a deep depression (mP, mPw, mT).
Anticyclonic Warm and dry in summer, occasional thunderstorms (mT, cT). Cold and frosty in winter with fog, especially in autumn (cP).
Westerlies bring damp air, uplift by Rockies.
Warm damp air from Atlantic. Hurricanes.
Sub-tropical high, descending, dry air.
Wind from east.
Note difference in wind direction and how cold air advances under the warm sector