Highlights
• Extremely heavy rainfall is predicted in
Western province during 24th - 30th June. Also, from the 1st- 7th July for the same
regions.
• Showers were experienced in Eastern,
Sabaragamuwa & Southern provinces with a max of 58 mm in Ratnapura on 23rd June.
• From 16th- 22nd June: up to 10 km/h from
the West and South were experienced over the island.
• Sea surface temperature was observed neutral
in the seas around Sri Lanka.
Monitoring
Rainfall
Total Rainfall for the Past Week: The RFE 2.0 tool shows Cumulative rainfall by Districts:- 10 – 25 mm - Colombo, Gampaha, Kalutara, Galle, Ratnapura, Kegalle, Nuwara Eliya, Kandy, Matale, Kurunegala, Puttalam, Polonnaruwa, Batticaloa, Ampara, Badullla, Anuradhapura, Trincomalee, Kilinochchi, Mullaitivu, Mannar, Vavuniya, Jaffna
- 2 – 5 mm - Moneragala, Hambantota
Total Rainfall for the Past Week:
- 10 – 25 mm - Colombo, Gampaha, Kalutara, Galle, Ratnapura, Kegalle, Nuwara Eliya, Kandy, Matale, Kurunegala, Puttalam, Polonnaruwa, Batticaloa, Ampara, Badullla, Anuradhapura, Trincomalee, Kilinochchi, Mullaitivu, Mannar, Vavuniya, Jaffna
- 2 – 5 mm - Moneragala, Hambantota
Weekly rainfall Anomalies by Districts:Rainfall Excess- 25 – 50 mm - Kilinochchi, Mullaitivu, Mannar, Vavuniya, Jaffna
- 25 – 50 mm - Kilinochchi, Mullaitivu, Mannar, Vavuniya, Jaffna
Rainfall Deficit- 25 – 50 mm - Galle, Matara, Hambantota, Kalutara, Colombo, Gampaha, Ratnapura, Kegalle, Kurunegala, Moneragala, Kandy
- 10 – 25 mm - Anuradhapura, Polonnaruwa, Puttalam, Matale, Nuwara Eliya, Batticaloa, Ampara, Badulla
- 25 – 50 mm - Galle, Matara, Hambantota, Kalutara, Colombo, Gampaha, Ratnapura, Kegalle, Kurunegala, Moneragala, Kandy
- 10 – 25 mm - Anuradhapura, Polonnaruwa, Puttalam, Matale, Nuwara Eliya, Batticaloa, Ampara, Badulla
Monthly Monitoring: Dekadal Rainfall by Districts:
1st – 10th June:- 18 mm - Gampaha, Colombo, Kalutara
- 16 mm - Kegalle, Ratnapura
- 14 mm - Badulla, Puttalam, Kurunegala
- 12 mm - Kilinochchi, Mannar, Mullaitivu, Vavuniya, Ampara
- 10 mm - Kandy, Nuwara Eliya, Moneragala, Galle, Matara
- 6 mm - Matale, Jaffna
- 4 mm - Hambantota, Batticaloa, Polonnaruwa, Anuradhapura, Trincomalee
- 18 mm - Gampaha, Colombo, Kalutara
- 16 mm - Kegalle, Ratnapura
- 14 mm - Badulla, Puttalam, Kurunegala
- 12 mm - Kilinochchi, Mannar, Mullaitivu, Vavuniya, Ampara
- 10 mm - Kandy, Nuwara Eliya, Moneragala, Galle, Matara
- 6 mm - Matale, Jaffna
- 4 mm - Hambantota, Batticaloa, Polonnaruwa, Anuradhapura, Trincomalee
11th – 20th June:- 4 mm - Gampaha, Colombo, Kalutara, Kegalle, Ratnapura, Mullaitivu, Kilinochchi
- 2 mm - Galle, Matara, Hambantota, Nuwara Eliya, Kandy, Matale, Badullla, Moneragala, Puttalam, Kurunegala, Anuradhapura, Trincomalee, Polonnaruwa, Mannar, Vavuniya, Jaffna
- 4 mm - Gampaha, Colombo, Kalutara, Kegalle, Ratnapura, Mullaitivu, Kilinochchi
- 2 mm - Galle, Matara, Hambantota, Nuwara Eliya, Kandy, Matale, Badullla, Moneragala, Puttalam, Kurunegala, Anuradhapura, Trincomalee, Polonnaruwa, Mannar, Vavuniya, Jaffna
Predictions
Rainfall
14-day prediction:NOAA NCEP models:
From 24th – 30th June:
Total rainfall by Provinces:
- 115 mm - Western, Sabaragamuwa
- 75 mm - Southern, Northwestern
- 65 mm - Central
- 35 mm - Uva, North Central
- 25 mm - Eastern
From 1st – 7th July:
Total rainfall by Provinces:
- 125 mm - Western, Sabaragamuwa
- 105 mm - Northwestern
- 85mm - Central, Southern
- 45 mm - Uva, North Central
- 25 mm - Northern
- 15 mm - Eastern
MJO based OLR predictions:
For the next 15 days:
MJO shall slightly
suppress the rainfall during 23rd- 27th Jun; slightly
enhance during 28th Jun – 2nd Jul and significantly
enhance during 3rd – 7th Jul.
Ocean State (Text Courtesy IRI)
Pacific Sea Sate: June 16, 2021
Equatorial SSTs were below average in parts of the eastern Pacific Ocean and near average across the rest of the Pacific Ocean in mid-June 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 Ocen State
Sea surface temperature was observed neutral in the seas around
Sri Lanka.