Highlights

Rainfall Prediction: From 25^th Nov – 01^st Dec,  heavy rainfall (>135 mm) is predicted for the Eastern Plains and Northern Plains; fairly heavy rainfall (50-100 mm) is expected in Western Hills, Western Plains, Eastern Hills, Southern Plains. From 08^th – 14^th Dec , the rainfall shall increase further.

Monitored Rainfall: During 26^th  November – 2^nd December, Cyclone Ditwah resulted significantly above average rainfall in SL, with daily average rainfall reaching 104 mm on 26^th, 157 on 27^th and 59 on 28^th.Polonnaruwa, Anuradhapura, Mannar, Vavuniya and Mullaitivu received above 200 mm rainfall from 26^th – 29^th Nov.

Monitored and Predicted Wind: From 17^th -23^rd Nov, winds at 1.5 km height were mostly from the northeast speeds ranging 4-8 m/s. From 03^rd – 09^th Dec, wind speeds are predicted to be in the range of 2-6 m/s coming from the northeast.

Monitored Sea and Land Temperature: Sri Lanka recorded seasonable temp across its regions. The Southern plains were the warmest, with maximum temp of 29.9°C. The sea surface temp was warmer than average around Sri  Lanka, ranging between 0.3°C and 1°C above average.