Highlights
• Showers of 35 mm expected in Eastern province during 1st - 7th March. A drop in rainfall over the rest of the country.
• Heavy rainfall was experienced in Northern and; Eastern provinces. Up to 81 mm max in Batticaloa on 18thFeb.
• From 16th - 22nd Feb: up to 5 km/h Northeasterly winds were experienced around along Sri Lanka.
• Sea surface temperature was observed near- neutral all along around Sri Lanka.
Monitoring
Rainfall
Total Rainfall for the Past Week: The RFE 2.0 tool shows Cumulative rainfall by Districts:- 25 – 50 mm - Badulla, Kilinochchi, Mullaitivu, Mannar, Nuwara Eliya, Ratnapura, Kalutara, Matara
- 10 – 25 mm - Moneragala, Vavuniya, Kandy, Kurunegala, Kegalle, Gampaha, Colombo, Galle, Hambantota
- 2 – 5 mm - Anuradhapura, Polonnaruwa, Ampara, Matale, Puttalam
There was no rainfall in the week in the remaining districts.
Total Rainfall for the Past Week:
- 25 – 50 mm - Badulla, Kilinochchi, Mullaitivu, Mannar, Nuwara Eliya, Ratnapura, Kalutara, Matara
- 10 – 25 mm - Moneragala, Vavuniya, Kandy, Kurunegala, Kegalle, Gampaha, Colombo, Galle, Hambantota
- 2 – 5 mm - Anuradhapura, Polonnaruwa, Ampara, Matale, Puttalam
Total rainfall Anomalies by DistrictsRainfall Excess- 25 – 50 mm - Kilinochchi, Mullaitivu, Mannar
- 10 – 25 mm - Badulla, Moneragala, Vavuniya, Nuwara Eliya, Ratnapura, Kalutara, Galle, Matara, Hambantota
Rainfall Deficit- 25 – 50 mm Puttalam, Kurunegala
- 10 – 25 mm Polonnaruwa, Matale
There was no rainfall in the week in the remaining districts.
Monthly Monitoring: Dekadal Rainfall by Districts:
- 25 – 50 mm - Kilinochchi, Mullaitivu, Mannar
- 10 – 25 mm - Badulla, Moneragala, Vavuniya, Nuwara Eliya, Ratnapura, Kalutara, Galle, Matara, Hambantota
- 25 – 50 mm Puttalam, Kurunegala
- 10 – 25 mm Polonnaruwa, Matale
1st – 10th February:- 8 mm - Ampara, Kalutara, Galle, Hambantota
- 6 mm - Ratnapura, Matara, Moneragala
- 4 mm - Batticaloa, Kandy, Nuwara Eliya, Badulla
- 2 mm - Jaffna, Vavuniya, Mannar Anuradhapura, Polonnaruwa, Trincomalee, Matale, Puttalam, Kurunegala, Kegalle, Gampaha, Colombo
- 8 mm - Ampara, Kalutara, Galle, Hambantota
- 6 mm - Ratnapura, Matara, Moneragala
- 4 mm - Batticaloa, Kandy, Nuwara Eliya, Badulla
- 2 mm - Jaffna, Vavuniya, Mannar Anuradhapura, Polonnaruwa, Trincomalee, Matale, Puttalam, Kurunegala, Kegalle, Gampaha, Colombo
11th – 20th February:
- 4 mm - Badulla, Moneragala, Kilinochchi, Mullaitivu, Mannar, Nuwara Eliya, Kegalle, Ratnapura, Matara, Hambantota
- 2 mm - Jaffna, Vavuniya, Polonnaruwa, Batticaloa, Ampara, Matale, Kandy, Colombo, Kalutara, Galle
- 4 mm - Badulla, Moneragala, Kilinochchi, Mullaitivu, Mannar, Nuwara Eliya, Kegalle, Ratnapura, Matara, Hambantota
- 2 mm - Jaffna, Vavuniya, Polonnaruwa, Batticaloa, Ampara, Matale, Kandy, Colombo, Kalutara, Galle
Predictions
Rainfall
14-day prediction:NOAA NCEP models:
From 27th – 28th February:
Total rainfall by Provinces:
25 mm - Eastern
From 1st – 7th March:
Total rainfall by Provinces:
35 mm - Eastern
MJO based OLR predictions:
For the next 15 days:
MJO shall slightly suppress the rainfall during 27th Feb – 4th Mar and Neutral during 5th – 9th March.
Ocean State (Text Courtesy IRI)
Pacific sea state: February 17, 2021
Equatorial Eastern and western Pacific SST reached La Niña threshold in mid-February, and the atmospheric variables were either ENSO-neutral or indicative of weak La Niña conditions.
Indian Ocean State
Sea surface temperature was observed near-neutral all along around Sri Lanka.