Climate Bulletin For Sri Lanka (26 February 2021)

 

Highlights                             

•  Showers of 35 mm expected in Eastern province during 1^st - 7^th 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 18^thFeb.

•  From 16^th - 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.

Download full report ↓

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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 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:

1^st – 10^th 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

11^th – 20^th 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

Predictions

Rainfall

14-day prediction: 
NOAA NCEP models: 

From 27^th – 28th February:

Total rainfall by Provinces: 

  25 mm - Eastern

  

From 1^st – 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.

Climate Bulletin For Sri Lanka (19 February 2021)

 

  Highlights                             

•  Showers of 45 mm  expected in Eastern province during 17^th - 23^rd Feb. A drop in rainfall over the rest of the country.

  •  Heavy rainfall was experienced in Southern, Uva and Sabaragamuwa provinces. Up to 104 mm max in Matara on 14^th Feb.

•  From 9^th- 15^th Feb: up to 4 km/h Northeasterly winds were experienced by the entire island.

•  Sea surface temperature was observed near- neutral all along around Sri Lanka.

Download full report ↓

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Monitoring

Rainfall
Total Rainfall for the Past Week: 

The RFE 2.0 tool shows Cumulative rainfall by Districts:

• 25 – 50 mm - Ratnapura, Matara, Badulla, Moneragala, Nuwara Eliya
• 10 – 25 mm - Kegalle, Galle, Hambantota, Kandy
• 5 – 10 mm - Kalutara, Matale
• 2 – 5 mm - Polonnaruwa, Colombo, Ampara, Batticaloa

There was no rainfall in the week in the remaining districts.

Total rainfall Anomalies by Districts

Rainfall Excess

• 25 – 50 mm - Ratnapura, Badulla, Moneragala
• 10 – 25 mm - Hambantota, Nuwara Eliya

Rainfall Deficit

• 25 – 50 mm - Polonnaruwa, Ampara, Batticaloa
• 10 – 25 mm - Vavuniya, Anuradhapura, Puttalam, Kurunegala, Gampaha, Colombo, Kalutara, Kegalle, Galle, Matara, Matale, Trincomalee, Kandy

There was no rainfall in the week in the remaining districts.

Monthly Monitoring: 

Dekadal Rainfall by Districts:

21^st – 31^st January:

• 12 mm - Ampara
• 10 mm - Batticaloa
• 6 mm - Moneragala, Polonnaruwa, Ratnapura
• 4 mm - Hambantota, Matara, Galle, Kalutara, Colombo, Gampaha, Kegalle, Nuwara Eliya, Kandy, Matale, Badulla, Anuradhapura, Trincomalee

• 2 mm - Puttalam, Kurunegala, Mannar, Vavuniya, Mullaitivu, Kilinochchi, Jaffna

1^st – 10^th February:

• 12 mm - Ampara, Hambantota
• 10 mm - Kalutara, Galle
• 6 mm - Ratnapura, Matara, Moneragala
• 4 mm - Kandy, Nuwara Eliya, Badulla, Batticaloa
• 2 mm - Jaffna, Vavuniya, Mannar, Anuradhapura, Polonnaruwa, Puttalam,Kurunegala, Matale, Gampaha, Colombo, Kegalle, Trincomalee

Predictions

Rainfall

14-day prediction: 
NOAA NCEP models: 

From 17^th – 23rd February:

Total rainfall by Provinces: 

  45 mm - Eastern

  

From 24^th  February – 2nd March:

Total rainfall by Provinces:

  25 mm - Eastern

MJO based OLR predictions:

For the next 15 days: 

MJO shall significantly suppress the rainfall during 16th – 25th Feb slightly suppress during 26th Feb –2nd March.

Ocean State (Text Courtesy IRI)

Pacific sea state: February 10, 2021 

Equatorial Eastern and western Pacific SST reached La Niña threshold in Early-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.

Climate Bulletin For Sri Lanka (12 February 2021)

     

                        Highlights                             

•  Showers of 55 mm expected in Eastern province during 10^th -16^th Feb. A drop in rainfall over the rest of the country.

  •  Heavy rainfall was experienced in Eastern and Southern provinces. Up to 87mm max in Kalutara on 8^th Feb.

•  From 2^nd- 8^th Feb: up to 8 km/h Northeasterly winds were experienced by the entire island.

•  Sea surface temperature was observed above 0.5⁰C to the South of Sri Lanka and neutral to the North.

Download full report ↓

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Monitoring

Rainfall
Total Rainfall for the Past Week: 

The RFE 2.0 tool shows Cumulative rainfall by Districts:

• 100 – 150 mm - Hambantota, Ampara
• 75 – 100 mm  - Moneragala
• 50 – 75 mm   -  Kalutara, Galle, Matara, Ratnapura
• 25 – 50 mm  -  Badulla, Batticaloa
• 10 – 25 mm  -  Polonnaruwa, Colombo, Kegalle, Nuwara Eliya, Matale, Kandy
• 5 – 10 mm   -  Trincomalee, Gampaha
• 2 – 5 mm    - Jaffna, Mullaitivu, Vavuniya, Anuradhapura, Puttalam, Kurunegala

Total rainfall Anomalies by Districts

Rainfall Excess

• 50 – 100 mm - Kalutara, Galle, Hambantota, Moneragala, Ampara
• 25 – 50 mm - Matara, Ratnapura
• 10 – 25 mm - Badulla

Rainfall Deficit

• 25 – 50 mm - Mullaitivu, Vavuniya, Anuradhapura, Polonnaruwa, Matale, Batticaloa, Trincomalee, Kurunegala
• 10 – 25 mm - Kilinochchi, Mannar, Puttalam, Gampaha, Colombo, Kegalle, Nuwara Eliya, Kandy

Monthly Monitoring: 

Dekadal Rainfall by Districts:

11^th – 20^th January:

• 18 mm - Galle, Matara, Kalutara, Ratnapura
• 16 mm - Vavuniya
• 14 mm - Batticaloa, Mullaitivu, Kurunegala, Kegalle, Colombo, Moneragala
• 12 mm - Kilinochchi, Hambantota, Ampara, Badulla, Polonnaruwa, Nuwara Eliya, Mannar, Jaffna, Trincomalee
• 10 mm  - Puttalam, Gampaha, Kandy, Matale, Anuradhapura

21^st – 31^st January:

• 12 mm - Ampara
• 10 mm - Batticaloa
•   6 mm - Moneragala, Polonnaruwa, Ratnapura
•  4 mm - Hambantota, Matara, Galle, Kalutara, Colombo, Gampaha, Kegalle, Nuwara Eliya, Kandy, Matale, Badulla, Anuradhapura, Trincomalee 
•  2 mm  - Puttalam, Kurunegala, Mannar, Vavuniya, Mullaitivu, Kilinochchi, Jaffna

Predictions

Rainfall

14-day prediction: 
NOAA NCEP models: 

From 10^th – 16^thFebruary:

Total rainfall by Provinces: 

  55 mm  - Eastern

  25 mm  - Northern

  

From 17^th – 23rd  February:

Total rainfall by Provinces:

  75 mm -  Eastern

  45 mm -  Northern

  25 mm -  North Central

MJO based OLR predictions:

For the next 15 days: 

MJO shall significantly suppress the rainfall during 9^th – 13^th Feb slightly suppressed during 14^th – 23rd Feb.

Ocean State (Text Courtesy IRI)

Pacific sea state: February 3, 2021 

Equatorial Eastern and western Pacific SST reached La Niña threshold in Early-February, and the atmospheric variables were either ENSO-neutral or indicative of weak La Niña conditions.

Indian Ocean State

Sea surface temperature was observed above 0.5⁰C to the South of Sri Lanka and neutral to the North.

Climate Bulletin For Sri Lanka (5 February 2021)

    

                        Highlights                             

• Heavy rainfall of 95 mm expected in Eastern province during 4th - 10th Feb. The drop in rainfall over the rest of the country. 

  •  Dangerously Heavy rainfall was experienced in Eastern & Sabaragamuwa provinces.Up to 218mm max in Batticaloa on 28th Jan.

•  From 27th  Jan- 2nd Fab: up to 8 km/h Easterly to Northeasterly winds were experienced by the entire island.

•  Sea surface temperature was observed near-neutral all along around Sri Lanka.

Download full report ↓

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Monitoring

Rainfall
Total Rainfall for the Past Week: 

The RFE 2.0 tool shows Cumulative rainfall by Districts:

• 100 – 150 mm - Batticaloa, Ampara
•  75  – 100 mm - Moneragala
•  50  –  75 mm  - Polonnaruwa, Badulla, Trincomalee, Kandy, Ratnapura, Kalutara, Colombo, Galle
•  25  –  50 mm - Hambantota, Matara, Gampaha, Kegalle, Nuwara Eliya, Matale, Anuradhapura, Kurunegala
• 10  –  25 mm  - Puttalam, Mannar, Vavuniya, Mullaitivu
•   2  –  5 mm   - Kilinochchi, Jaffna

Total rainfall Anomalies by Districts

Rainfall Excess

• 100 – 200 mm  - Ampara
• 50  –  100 mm  - Batticaloa, Moneragala
• 50  –  100 mm  - Badulla, Hambantota, Matara, Galle, Kalutara, Colombo, Kandy, Ratnapura
• 50  –  100 mm  - Matale, Nuwara Eliya, Polonnaruwa, Kegalle, Gampaha

Rainfall Deficit

• 10 – 25 mm - Puttalam, Kurunegala, Trincomalee, Anuradhapura, Mannar, Vavuniya, Mullaitivu, Kilinochchi, Jaffna 

Monthly Monitoring: 

Dekadal Rainfall by Districts:

11^th – 20^th January:

• 18 mm - Galle, Matara, Kalutara, Ratnapura
• 16 mm - Vavuniya
• 14 mm - Batticaloa, Mullaitivu, Kurunegala, Kegalle, Colombo, Moneragala
• 12 mm - Kilinochchi, Hambantota, Ampara, Badulla, Polonnaruwa, Nuwara Eliya, Mannar, Jaffna, Trincomalee
• 10 mm  - Puttalam, Gampaha, Kandy, Matale, Anuradhapura

21^st – 31^st January:

• 12 mm - Ampara
• 10 mm - Batticaloa
•   6 mm - Moneragala, Polonnaruwa, Ratnapura
•  4 mm - Hambantota, Matara, Galle, Kalutara, Colombo, Gampaha, Kegalle, Nuwara Eliya, Kandy, Matale, Badulla, Anuradhapura, Trincomalee 
•  2 mm  - Puttalam, Kurunegala, Mannar, Vavuniya, Mullaitivu, Kilinochchi, Jaffna

 Predictions

Rainfall

14-day prediction: 
NOAA NCEP models: 

From 4^th – 10^thFebruary:

Total rainfall by Provinces: 

  95 mm - Eastern

  35 mm - Northern, Southern 

  25 mm - Sabaragamuwa, Uva

  15 mm - Western, Central,North-central

  

From 11^th – 17^thFebruary:

Total rainfall by Provinces:

105 mm - Eastern

 55 mm  - Northern

 45 mm  - North-central

 35 mm  - Southern, Sabaragamuwa, Uva

 25 mm  - North-western, Western, Central

MJO based OLR predictions:

For the next 15 days: 

MJO shall significantly suppress the rainfall during 3^rd – 17^th Feb. 

Ocean State (Text Courtesy IRI)

Pacific sea state: January 27, 2021 

Equatorial Eastern Pacific SST reached La Niña threshold in late-January 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.