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Friday, March 5, 2021

Climate Bulletin For Sri Lanka ( 5 March 2021)



  Showers of 55 mm expected in Eastern province during 4th 10th  March. A drop in rainfall over the rest of the country.
  •  Heavy rainfall was experienced in Western and Southern provinces. Up to 79 mm max in Kalutara on 23rd  Feb. 
•  From 23rd Feb - 1st  March: up to 6 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 - Kalutara, Galle
  • 10 – 25 mm - Matara, Ratnapura
  • 5 – 10 mm - Kurunegala, Kandy, Gampaha, Colombo, Kegalle
  • 2 – 5 mm - Puttalam, Nuwara Eliya
There was no rainfall in the week in the remaining districts.

Total rainfall Anomalies by Districts
Rainfall Excess
  • 25 – 50 mm - Kalutara, Galle
Rainfall Deficit
  • 10 – 25 mm - Mullaitivu, Mannar, Vavuniya, Puttalam, Kurunegala, Anuradhapura, Polonnaruwa, Batticaloa, Ampara, Badulla, Moneragala, Matale, Kandy, Nuwara Eliya, Colombo, Matara, Hambantotta, Kegalle, Ratnapura
There was no rainfall in the week in the remaining districts.

Monthly Monitoring
Dekadal Rainfall by Districts:

11th – 20th February:
  • 6 mm - Kilinochchi, Mullaitivu, Mannar
  • 4 mm - Badulla, Moneragala, Nuwara Eliya, Matara, Hambantota, Kegalle, Ratnapura
  • 2 mm - Jaffana, Vavuniya, Polonnaruwa, Batticaloa, Ampara, Matale, Kandy, Colombo, Kalutara, Galle

21st – 28th February:

  • 6 mm - Kalutara, Galle, Ratnapura
  • 4 mm - Nuwara Eliya, Colombo, Matara, Kegalle
  • 2 mm -Puttalam, Kurunegala, Ampara, Badulla, Moneragala, Matale, Kandy, Gampaha, Hambantota



14-day prediction: 
NOAA NCEP models: 
From 4th – 10th March:
Total rainfall by Provinces: 
  • 55 mm - Eastern
  • 35 mm - Uva
  • 25 mm - North Central, North western, Southern, Western, Central, Sabaragamuwa
  • 15 mm - Northern
From 11th – 17th March:
Total rainfall by Provinces:
  • 45 mm   - Eastern
  • 25 mm   - Central, Uva
  • 15 mm -Northern, North Central, North western, Southern, Western, Sabaragamuwa
MJO based OLR predictions:
For the next 15 days: 
MJO shall slightly suppress the rainfall during 3rd–7th March and Neutral during 8th – 17th  March.

Ocean State (Text Courtesy IRI)
Pacific sea state: February 24, 2021 
Equatorial Eastern and western Pacific SST reached La Niña threshold in late-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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