O Surface wind: mean 240° true, 15 knots; varying between 200° and 280°;
minimum visibility 8 km; slight rain; cloud: 3-4 oktas base 1000 feet, 5-7
oktas base 2500 feet, 8 oktas base 8000 feet; temperature +18°C, dewpoint
+ 15°C; QNH 993 mb; Trend: temporarily, lasting less than hour, or, if
recurring, lasting less than half the trend, visibility 3000 metres in rain with
5-7 oktas at base 800 feet, 8 oktas 2000 feet.