Highlights
• 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.
Monitoring
Rainfall
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 for the Past Week:
- 25 – 50 mm - Kalutara, Galle
- 10 – 25 mm - Matara, Ratnapura
- 5 – 10 mm - Kurunegala, Kandy, Gampaha, Colombo, Kegalle
- 2 – 5 mm - Puttalam, Nuwara Eliya
Total rainfall Anomalies by DistrictsRainfall 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:
- 25 – 50 mm - Kalutara, Galle
- 10 – 25 mm - Mullaitivu, Mannar, Vavuniya, Puttalam, Kurunegala, Anuradhapura, Polonnaruwa, Batticaloa, Ampara, Badulla, Moneragala, Matale, Kandy, Nuwara Eliya, Colombo, Matara, Hambantotta, Kegalle, Ratnapura
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
- 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
- 6 mm - Kalutara, Galle, Ratnapura
- 4 mm - Nuwara Eliya, Colombo, Matara, Kegalle
- 2 mm -Puttalam, Kurunegala, Ampara, Badulla, Moneragala, Matale, Kandy, Gampaha, Hambantota
Predictions
Rainfall
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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