Climate Bulletin For Sri Lanka (6 August 2021)

  

Highlights          

                   

  • Fairly heavy rainfalls are predicted in Western, Sabaragamuwa, Northcentral, Central & Southern provinces during 6th -9th  Aug.

  • Fairly heavy rainfalls were experienced in the Western, Central & Sabaragamuwa provinces with max of 54 mm in Ratnapura district on 27th July.

  • From 26th July - 1st August: up to  15 km/h from the South westerly were experienced over the island.

  • Sea surface temperature was observed above 0.5℃ around all of Sri Lanka.

Download full report ↓

---

Monitoring

Rainfall

Total Rainfall for the Past Week: 

The RFE 2.0 tool shows Cumulative rainfall by Districts:

• 10 - 25 mm - Mullaitivu, Vavuniya, Anuradhapura, Trincomalee
• 5 – 10 mm  - Jaffna, Mannar, Kalutara, Moneragala, Badulla
• 2 – 5 mm    - Killinochchi, Puttalam, Kurunegala, Ratnapura, Ampara

Weekly rainfall Anomalies by Districts:

Rainfall Excess

• 10 - 25 mm - Puttalam, Kurunegala, Kandy, Nuwara Eliya, Gampaha, Colombo, Kalutara, Galle, Matara, Hambantota, Kegalle, Ratnapura, Moneragala, Badulla, Ampara, Batticaloa

Monthly Monitoring: 

Dekadal Rainfall by Districts:

11^th – 20^th July:

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

21^st – 31^st July:

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

Predictions

Rainfall

14-day prediction: 
NOAA NCEP models: 

From 3^rd – 9^th August: 

Total rainfall by Provinces

• 75 mm - Western, Sabaragamuwa
• 65 mm - Southern, North central, Central
• 35 mm - Uva, Eastern, North western
• 25 mm - Northern

From 10^th – 16^th August: 

Total rainfall by Provinces:

• 95 mm - Sabaragamuwa, Western
• 85 mm - Southern, North Central
• 75 mm - North Western, Central
• 65 mm - Northern, Uva, Eastern

MJO based OLR predictions:

For the next 15 days: 

MJO shall be neutral the rainfall during 6^th – 16^th August. 

Ocean State (Text Courtesy IRI)

Pacific Sea Sate: July 28, 2021 

Equatorial SSTs were below average in parts of the eastern Pacific Ocean and near average across the rest of the Pacific Ocean in late July and most key atmospheric variables were ENSO –Neutral condition. A large majority of the model forecasts predict ENSO-neutral likely to continue through the Northern Hemisphere summer.

Indian Sea Sate

Sea surface temperature was observed above 0.5℃ around all of Sri Lanka.