The appearance of rainy spells was due to a low-pressure trough connecting with a range of upper-air wind convergence at 1,500 meters above the surface.
(Illustrative photo:SGGP)
It is forecast that the medium-heavy rains will continue to maintain in the Northern and Central regions from now until May 18 with average rainfalls between 50 mm and 120 mm, even up to 150 mm along with risks of lightning, hail, thunderstorm, whirlwinds, landslide, flash flood and flooding in the mountainous provinces.
However, the hot climate is warned to return the Northern and Central regions from May 19.
