Singapore residents can expect short, thundery showers on most afternoons for the remainder of April. The Meteorological Service Singapore (MSS) issued its fortnightly weather advisory on April 16, forecasting these showers may extend into the evening on some days.
Sumatra Squalls and Inter-Monsoon Conditions
In addition to the afternoon showers, MSS indicates that Sumatra squalls may bring widespread thundery showers with gusty winds during pre-dawn hours and mornings on one or two days. These squalls are described as a vigorous line of thunderstorms traveling towards the South China Sea, caused by convection over the Malacca Strait and converging land breezes.
Prevailing winds will generally be light and variable, shifting from the south-east or south-west on some days. Daily maximum temperatures are expected to range between 33 and 34 degrees Celsius, potentially reaching 35 degrees Celsius on a few days.
rainfall for the second half of April is expected to be near average across most of the island, though some days may experience little rainfall. These conditions are linked to the continuation of inter-monsoon conditions, which are expected to last until May.
The first half of April saw more rainfall than the latter half of March, with most thundery showers occurring in the afternoons due to daytime heating. Maximum temperatures exceeded 34 degrees Celsius on 12 days in the previous fortnight, peaking at 35.4 degrees Celsius at Paya Lebar on April 5.
Rainfall varied across the island, with Bedok North registering 91% below average rainfall, whereas Seletar recorded 5% above average rainfall during the recent two-week period.
Frequently Asked Questions
What are Sumatra squalls?
Sumatra squalls are a common and vigorous line of thunderstorms that develop over Sumatra and move towards the South China Sea.
When are Sumatra squalls most likely to occur?
Sumatra squalls may occur at any time of year, but are most common from April to November.
What kind of weather is expected for the rest of April?
Short, thundery showers are expected on most afternoons, potentially extending into the evening. Sumatra squalls may also bring widespread showers and gusty winds during pre-dawn hours and mornings on one or two days.
How will you prepare for the possibility of afternoon showers and potential squalls in the coming weeks?
