- The NCEP weekly rainfall forecast predicts total rainfall up to 35 mm in Kegalla and Ratnapura districts during 18th - 24th July.
- Between 10 - 16 Jul: up to 50 mm of rainfall was recorded in Ratnapura and Galle districts on the 10th.
- From 8 - 14 Jul: minimum temperature of 20 OC was recorded from Nuwara Eliya and Badulla districts while eastern coastal regions including Anuradhapura district recorded a maximum temperature between 35-40 OC.
- From 10 - 16 Jul: up to 72 km/h, northwesterly winds were experienced by the entire island.
- Average sea surface temperature was observed in the seas around Sri Lanka.
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Weekly Monitoring: On July 10th, Ratnapura and Galle districts received up to 50 mm of rainfall; Gampaha, Colombo, Kalutara, Nuwara Eliya, Monaragala and Hambantota districts up to 30 mm; and Puttalam, Kurunegala, Matale, Kandy, Kegalla and Badulla districts up to 20 mm. On the 11th, Gampaha, Colombo, Kegalla, Ratnapura, Nuwara Eliya and Badulla districts received up to 15 mm of rainfall; and most of areas of the southern part of the island up to 10 mm. On the 12th, Kegalla and Kandy districts received up to 5 mm of rainfall. No significant rainfalls were recorded in any part of the island on the 13th. On the 14th, Nuwara Eliya district received up to 30 mm of rainfall; and Ratnapura, Kandy, Monaragala and Hambantota districts up to 15 mm. On the 15th, Nuwara Eliya district received up to 30 mm of rainfall; Colombo, Kalutara, Galle, Matara, Hambantota, Ratnapura, Badulla and Monaragala districts up to 20 mm; and Gampaha, Puttalam, Kegalla, Matale and Ampara districts up to 15 mm. On the 16th, Nuwara Eliya districts received up to 20 mm of rainfall; and Matale, Kandy, Badulla, Monaragala, Kegalla, Ratnapura, Gampaha, Colombo, Kalutara and Galle districts up to 5 mm.
Total Rainfall for past week : The RFE 2.0 tool shows up to 75-100 mm of total rainfall in Nuwara Eliya district; up to 50-75 mm of total rainfall in Colombo, Kalutara, Ratnapura, Kegalla and Badulla districts; and up to 25-50 mm in most of areas of the southern part of the island. Above average rainfall up to 25-50 mm is shown for Nuwara Eliya district. Below average rainfall up to 36-60 mm is shown for Ratnapura district; and up to 10-25 mm is shown for Vavuniya, Anuradhapura, Polonnaruwa, Trincomalee, Batticaloa, Matale, Ampara, Kurunegala, Kegalla, Colombo, Kalutara and Galle districts.
Monthly Monitoring: During June - above average rainfall conditions were experienced by the western and south-western regions of the island. Ratnapura district received up to 210 mm above average rainfall; Kegalla, Nuwara Eliya and Kalutara districts up to 150 mm; and Puttalam, Kurunegala, Colombo, Galle and Matara districts up to 60 mm. The CPC Unified Precipitation Analysis tool shows up to 500 mm of total rainfall in Ratnapura district; up to 300 mm Kegalla, Colombo and Kalutara districts; up to ~200 mm Gampaha, Galle and Nuwara Eliya districts; and up to 150 mm in Jaffna, Vavuniya, Anuradhapura, Trincomalee, Polonnaruwa, Kurunegala, Matale, Kandy, Badulla, Monaragala, Ampara and Hambantota districts.
NOAA NCEP Models:
From 18th – 24th Jul: Total rainfall between 25-35 mm in Kegalla and Ratnapura districts; and between 15-25 mm in Gampaha, Kurunegala, Kandy, Nuwara Eliya and Matara districts.
From 25th – 31st Jul: Total rainfall between 25-35 mm in Kegalla and Ratnapura districts; and between 15-25 mm in Gampaha, Kurunegala, Kandy, Nuwara Eliya and Matara districts.IMD WRF Model Forecast:
20th July: No Rainfall.
21st July: No Rainfall.
IRI Weekly forecast:
From 18th – 23th Jul: Total rainfall up to 25 mm expected for most parts of the island.
Ocean State (Text Courtesy IRI)
PACIFIC SEAS STATE : July 12, 2018
In early July 2018, the east-central tropical Pacific waters reflected ENSO-neutral conditions, with slightly above average SST. The key atmospheric variables also suggested neutral conditions. The subsurface water temperature continued to be above-average. The official CPC/IRI outlook calls for neutral conditions through northern summer season, with a 65% chance of El Niño development during fall, rising to 70% for winter 2018-19. An El Niño watch is in effect. The latest forecasts of statistical and dynamical models collectively favor weak El Niño development by late summer, growing to weak or moderate strength during fall and winter; forecasters are largely buying into this scenario now that the spring barrier is largely passed.
INDIAN OCEAN STATE : Average sea surface temperature was observed in the seas around Sri Lanka.