Highlights: Wet weather conditions prevailed in many parts of the country during 19th-25th October, with the highest recorded rainfall of 90mm in Kegalle on 24th. Minimum temperature of 15 OC was recorded from Nuwara Eliya district while the maximum temperature between 35-40 OC was recorded from Vavuniya, Mannar and Anuradhapura districts. Up to 30km/h north westerly winds were recorded in the southern half of the country. For the period from 26th October – 1st November the NOAA NCEP model predicts up to 55mm of rainfall for Colombo, Ratnapura, Galle and Matara regions. Up to 15km/h westerly wind is expected in the southern regions of the country.
Thursday, October 27, 2016
Thursday, October 20, 2016
Weekly Hydro-meteorological Report, 20, October 2016
Highlights: A significant increase in the rainfall events was observed during the previous week from 13th - 18th October compared to the previous week. The highest rainfall of 140 mm for the period was recorded in Kirinda area on 17th. The minimum temperature of 20OC was recorded from Nuwara Eliya district while the maximum temperature was recorded from the northern eastern and south eastern coastal areas to be between 35-40 OC. Up to 30 km/h north westerly winds were recorded in the southern regions of the country. For the period from 19th - 25th October the NOAA NCEP model predicts up to 45 mm rainfall for Galle and Matara districts. Up to 30 km/h north westerly wind is expected in the southern half of the country.
Thursday, October 13, 2016
Weekly Hydro-meteorological Report, 13, October 2016
Highlights: Drought conditions were seen throughout the country with only less than 10 mm/day rainfall received mostly by the south-western region of the country. WRF, CFS and GFS rainfall prediction models predict high rainfall after the 15th October. High rainfall (up to 125 mm) is expected in south-western, western and eastern regions of the country. During 12th- 17th very heavy rainfall is expected close to Pottuvil. The tropical pacific SST anomaly is close to -0.5 OC (weak La Niña threshold). A La Niña in October- November period usually results in very dry weather in Sri Lanka. MJO shall be in the western-Pacific during the next 15 days and shall suppress rainfall in Sri Lanka.
Thursday, October 6, 2016
Weekly Hydro-meteorological Report, 06, October 2016
Highlights: An increase in the rainfall events was observed during the previous week from 28th September - 4th October compared to the previous week. The highest rainfall of 140 mm for the period was recorded in Ahungalla area on 28th. The minimum temperature of 20OC was recorded from Nuwara Eliya district while the maximum temperature was recorded from the northern eastern coastal areas to be between 35-40OC.Up to 35 km/h north westerly winds were recorded in the southern regions of the country. For the period from 12th - 18th October the NOAA NCEP model predicts up to 25 mm rainfall for the western regions of the island. Up to 55 km/h north westerly wind is expected in the southern part of the country.
Friday, September 30, 2016
Weekly Hydro-meteorological Report, 29, September 2016
Highlights: Dry weather conditions were experienced throughout the island during the previous week from 20th-26th September. Less than 10 mm rainfall was received by Ratnapura and Trincomalee regions. The minimum temperature of 20 OC was recorded from Nuwara Eliya district while the maximum temperature was recorded from the Northern and Eastern coastal areas to be between 35-40 OC. Up to 55 km/h north westerly winds were recorded in the southern regions of the country. For the period from 27th September - 11th October the NOAA NCEP model predicts dry weather conditions in the island. Up to 35 km/h north westerly wind is expected in the southern and western parts of the country. ENSO is still in the neutral phase and therefore shall not support rainfall conditions in Sri Lanka. MJO shall also suppress rainfall in the country in the next two weeks. Therefore the weather has a higher tendency to be dry over the next month.
Friday, September 23, 2016
Weekly Hydro-meteorological Report, 22, September 2016
Highlights: Mixed weather conditions were experienced in the previous week from 14th-20th September in the island. Eastern sea near the island received heavy rainfall on 15th with sea region near Batticaloa receiving up to 180 mm. The highest rainfall of 30 mm for the period was recorded close to Beligalla and Padiyathalawa near the Badulla Ampara district border. The minimum temperature of 20 OC was recorded from Nuwara Eliya district while the maximum temperature was recorded from the North Eastern coastal areas to be between 35-40 OC. Up to 35 km/h north westerly winds were recorded in the entire country. For the period from 22th-27th the NOAA NCEP model predicts dry weather conditions in the island. Up to 55 km/h north westerly wind is expected in the southern half of the country. In the central regions up to 55 km/h westerly wind is expected.
Monday, September 19, 2016
Hydro-meteorological Highlights , 19, September 2016
Highlights :Mostly dry weather conditions were experienced in the previous week from 10th-17th September along with slight rainfall in some areas. Highest rainfall of 60 mm was recorded from Kirama area close to Matara Hambantota border on the 12th. On the 15th up to 20 mm of rainfall was recorded in Mutur, Baduluwewa and Inginiyagala while the surrounding regions received up to 15 mm of rainfall. On the same day up to 90 mm of rainfall is shown in the eastern sea close to Vakarai. Within the week the RFE 2.0 tool shows total rainfall of between 50-75 mm near Kirama area close to Matara-Hambantota border, 10-25 mm in Trincomalee, Seruwawila and Trikonamadua areas in the Eastern Province and Ratnapura town and nearby areas. It also shows 5-10 mm of total rainfall in several areas of Kegalle and Ratnapura districts and rainfall of less than 5 mm in several areas in the Anuradhapura district and Ampara district. During the week the minimum temperature of 15-20 OC was recorded in Nuwara Eliya while the maximum temperature was recorded in the North Eastern region of the country that includes Jaffna, Mullaitivu, Trincomalee and Vavuniya districts. Up to 55 km/h north westerly wind was experienced by the Southern province while the rest of the island experienced 36 km/h north westerly winds. The IMD GFS models predicts dry weather conditions in the coming week from 19th-25th except rainfall in some areas in the south western side of the country. The model predicts between 10-20 mm of rainfall in Kalutara, Galle and close by areas and the adjacent sea on 19th-21st and 24th-25th. On 21st between 10-20 mm of rainfall is predicted in Colombo as well. On 22nd between 10-20 mm of rainfall is expected in Kokkilai, Pulmoddai and surrounding areas. In the coming week up to 55 km/h north westerly wind is expected in southern and sabaragamuwa provinces while the rest of the country other than the northern region may experience up to 36 km/h north westerly winds. Kurunegala, Matale and Polonnaruwa districts may experience south westerly winds.
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