Expect occasionally windy and cooler conditions
Advisory
Singapore, 16 December 2015 – In the next fortnight, Northeast Monsoon conditions are forecast to prevail over the region with low level winds blowing predominantly from the northeast or northwest.
2. During this period, thundery showers are expected mostly in the afternoon and early evening on five to seven days due to convergence of winds coupled with strong solar heating of land areas. Occasionally windy conditions and cooler temperatures can be expected. In addition, widespread moderate to heavy rain arising from the strengthening of the monsoon winds are likely on two to three days in the second half of the period. The temperature range for the fortnight is forecast to be between 22 and 33 degrees Celsius.
3. Based on long-term statistics, December is the wettest month in the year. The rainfall for December 2015 is likely to be normal.
Review of 1 – 15 December 2015
4. Northeast Monsoon conditions prevailed over the region in the first fortnight of December 2015, with low level winds blowing predominantly from the northeast or northwest.
5. Singapore experienced thundery showers in the afternoon and early evening on most days in December 2015 due to strong solar heating of land areas and convergence of winds over the region. The thundery showers were heaviest on 1 December 2015 where the highest total daily rainfall recorded was 114.2 mm in Sentosa. In addition, there were a few warm days where the highest daily maximum temperature recorded ranged between 34.2 and 34.7 degrees Celsius. On a few rainy days, the lowest daily minimum temperature recorded was between 22.4 and 22.8 degrees Celsius.
6. Most parts of Singapore received above average rainfall in the first fortnight of December 2015. The highest rainfall of 273 mm to 327 mm (95% to 120% above average) was recorded in the southern and central parts of Singapore around Sentosa and Orchard areas respectively. The eastern part of the island around Pulau Ubin received the lowest rainfall where 106 mm to 119 mm (0 to 30% below average) was recorded.
