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Friday, February 26, 2021

Climate Bulletin For Sri Lanka (26 February 2021)



  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.


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 Anomalies by Districts
Rainfall 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:

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

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



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.

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