Highlights: Wet weather conditions prevailed in many parts of the country during the previous week from 2rd-7th November. The highest rainfall of 90 mm for the period was recorded in adjacent south eastern sea on 3rd. Minimum temperature of 15 OC was recorded from Nuwara Eliya district while most parts of the island recorded a maximum temperature between 30-35 OC Up to 20 km/h north westerly winds were recorded in the southern region of the country. For the period from 2nd– 8th November the NOAA NCEP model predicts up to 85 mm of rainfall for Colombo and adjacent sea regions.
Wednesday, November 16, 2016
Thursday, November 3, 2016
Weekly Hydro-meteorological Report, 3, November 2016
Highlights: Heavy rainfalls were observed throughout the country during the latter part of the previous week from 26th October -1st November. The highest rainfall of 160mm for the period was recorded in Galle and Matara on 30th. Minimum temperature of 15 OC was recorded from Nuwara Eliya district while the maximum temperature between 35-40 OCwas recorded from Trincomalee. Up to 20km/h north westerly winds were recorded in the Southern province. For the period from 2nd– 8th November the NOAA NCEP model predicts up to 85mm of rainfall for Colombo and adjacent sea regions. Up to 18km/h north westerly wind is expected in the whole country.
Thursday, October 27, 2016
Weekly Hydro-meteorological Report, 27, October 2016
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 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.
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