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Thursday, December 31, 2015

Weekly Hydro-meteorological Report, 31 December, 2015


Highlights:


Slight decrease of rainfall was observed in the entire country in the week 23rd – 29th December. Highest rainfall was observed in western region of Kilinochchi and the ocean near Delft Island on 27th December. Relatively high rainfall was observed in several regions in Matale, Moneragala and Badulla. NOAA NCEP models predict increase of rainfall during next week. MJO phase is in 6 and shall continue to slightly suppress rainfall of the country.
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Thursday, December 24, 2015

Weekly Hydro-meteorological Report, 23 December, 2015


Highlights:


As predicted in the previous week there was a significant decrease in rainfall in the entire country. NOAA NCEP models predict that the rainfall shall decrease further in the next two weeks. The highest rainfall observed this week was on the 17th near the district boundary separating Anuradhapura and Mannar districts. Apart from that the coastal region from Trincomalee to Kalmunai received relatively high rainfall. High sea surface temperature is observed in the entire Indian Ocean. The MJO is still in phase 5 and shall continue to suppress rainfall slightly.
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Thursday, December 17, 2015

Weekly Hydro-meteorological Report, 17 December, 2015


Highlights:


High rainfall continued in the entire country during 8th- 14th December week as well but there was a slight decrease in rainfall compared to previous weeks. Heaviest rainfall was recorded on the 14th this week where Gampaha and Badulla districts received very heavy rainfall. NOAA and IRI CFS models predict a significant decrease in the rainfall in the fortnight starting from the 16th. However the MJO is in phase 4 which shall slightly enhance rainfall conditions. IRI further predicts that there shall be below average rainfall during the first quarter of 2016 with 50% probability.
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Thursday, December 10, 2015

Weekly Hydro-meteorological Report, 10 December, 2015


Highlights:


Heavy rainfall was observed in the entire country during the 1st- 7th December 2015. The Sea around the country also received extremely heavy rainfall during this week. NOAA NCEP models predict a decrease in the rainfall in northern and north central regions of the country but very heavy rainfall shall continue in the eastern region during the next two weeks. The sea surface temperature around the country is neutral. The MJO shall be in phases 5 and 6 during the next week which shall suppress rainfall.
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Thursday, December 3, 2015

Weekly Hydro-meteorological Report, 03 December, 2015


Highlights:


Heavy rainfall was observed in the last few days throughout the country due to a low pressure area in the Bay of Bengal. Up to 40 mm rainfall was observed in northern and eastern regions of the country during the time period 25th November – 1st December. Heavy rainfall up to 160 mm was observed in ocean near Puttalam and up to 130 mm in ocean near Trincomalee on 1st December. Rainfall up to 110 mm was observed around Sinharaja Forest Reserve on 30th November. NOAA NCEP models predict rainfall excess of 135 mm in the northern, north central and central regions of the country. The rest of the country too shall receive high rainfall (about 95 mm) Very heavy rainfall is predicted for the area around Badulla in the next few days by IRI CFS models.
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Thursday, November 26, 2015

Weekly Hydro-meteorological Report, 26 November, 2015


Highlights:


Up to 40 mm rainfall was observed in northern and eastern regions of the country during 17th-23rd November. Heavy rainfall up to 130 mm was observed in ocean near Mannar on 23rd November and up to 110 mm in ocean near Mullaitivu on 18th November. Rainfall up to 80 mm was observed around northern region of Moneragala and Welioya on 20th November. High rainfall shall continue in northern and north-eastern regions of the country in the next two weeks.
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Thursday, November 19, 2015

Weekly Hydro-meteorological Report, 19 November, 2015


Highlights:


Up to 40 mm rainfall was observed in northern, north eastern and north western regions of the country during the time period 10th-16th November. Heavy rainfall up to 180 mm was observed in ocean near Kilinochchi on 13th November and up to 160 mm in Jaffna, Kilinochchi and Mannar island on 15th November. Rainfall up to 100 mm was observed in Giriulla on 12th November. Every prediction model predict increase of rainfall during the next week. Below average sea surface temperature was observed around Sri Lanka
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Thursday, November 12, 2015

Weekly Hydro-meteorological Report, 12 November, 2015


Highlights:


Up to 40 mm rainfall was observed in northern, north eastern, north central and southern regions of the country during the time period 4th-10th November. Heavy rainfall up to 120 mm was observed in ocean near Ampara on 9th November and ocean near Jaffna on 8th November. Rainfall up to 80 mm was observed in ocean near Jaffna on 7th November. IRI and IMD models predict a decrease in rainfall in next two weeks but still high rainfall is expected during this period.
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Thursday, November 5, 2015

Weekly Hydro-meteorological Report, 05 November, 2015


Highlights:


Up to 40 mm rainfall was observed in northern, north eastern and western regions of the country during the time period 27th October – 2nd November. Heavy rainfall up to 160 mm was observed in Trincomalee on 27th October and Kekirawa on 2nd November. Rainfall up to 120 mm was observed in Mankulam, Punewa, Mihintale and Trincomalee on 1st November. Every prediction model predict increase of rainfall during the next week.
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Thursday, October 29, 2015

The Climate Over Sri Lanka up to the Yala 2015

By: Prabodha Agalawatte, Udara Rathnayake, Zeenas Yahiya, Lareef Zubair

Summary

The rainfall from January to March leading up to the 2015 Yala season was slightly lower than normal; the rain picked up in April and May exceeding normal values. Even though the rainfall remained below normal for the rest of the season through August, the water availability was suited for irrigated cultivation such as for rice. North-central region of the country mostly received above average rainfall while south western regions which usually receive high rainfall mostly received below average rainfall. During September the entire country received above average rainfall. Heavy rainfall was observed during last two weeks of September which caused floods in several areas of the country. An El Nino event which had developed to a borderline state for many months became a fully-fledged event by July 2015. Usually during an El Nino, the rainfall is deficient from January to March and June to August. Rainfall in October to December is above normal and in May too is usually above normal. In addition, a positive Indian Ocean Dipole event took place – what this means is that the Arabian sea is warmer than normal in relation to the Bay of Bengal seas surfaces near Sumatra. In positive dipole events, usually there is a weak drop in rainfall from June to August and a significant rise from September to November.  So this years, rainfall is following close to the historical averages for a combined El Nino and positive Indian Ocean Dipole event. In addition to this the amplitude of the Madden Julian Oscillation (MJO) in 2015 has been a mixture of very high amplitude events and weak events. When the amplitude is higher than 1 the rainfall is enhanced or suppressed based on the location of the MJO wave. When it is less than 1 MJO is considered to be weak and there shall not be an impact on rainfall. During March- April and June- July the MJO was strong. During February, May, August- September the MJO was mostly weak. Severe drought conditions were not observed during the early Yala season because most parts of the country observed high rainfall in April and May. Significant below average rainfall was only observed in July 2015.

Weekly Hydro-meteorological Report, 29 October, 2015


Highlights:


Up to 40 mm rainfall was observed in north eastern, western and southern regions of the country during 21st – 27th October. Kalkudah, Kalmunai and Kattankudy received heavy rainfall up to 220 mm on 24th October and rainfall up to 160 mm was observed in the ocean near Trincomalee while Trincomalee received rainfall up to 140 mm on 27th October. Every prediction model predict an increase of rainfall during the next week.
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Thursday, October 22, 2015

Weekly Hydro-meteorological Report, 22 October, 2015


Highlights:


Up to 40 mm rainfall was observed in north western, western and southern regions of the country during the time period 14th – 20th October. Gampaha received heavy rainfall up to 160 mm on 18th October and rainfall up to 140 mm was observed in Hikkaduwa. Udawela received rainfall up to 110 mm on 20th October. Every prediction model predict increase of rainfall during the next week.
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Thursday, October 15, 2015

Weekly Hydro-meteorological Report, 15 October, 2015


Highlights:


Up to 40 mm rainfall was observed in northern, north eastern, western and south western regions of the country during the time period 7th – 13th October. Nuwara Eliya received heavy rainfall up to 70 mm on 11th October and rainfall up to 90 mm was observed in Ratnapura and Anuradhapura on 13th October. Very heavy rainfall is expected in the central region of the country in the next week. Every prediction model predict an increase in the rainfall during the next week.
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Friday, October 9, 2015

Weekly Hydro-meteorological Report, 8 October, 2015


Highlights:


Up to 40 mm rainfall was observed in northern, north eastern, western, south western and southern regions of the country during the time period 29th September- 5th October. Southern region of Anuradhapura received heavy rainfall up to 110 mm on 25th September and rainfall up to 70 mm was observed in Badulla on 1st October and in Moneragala on 2nd October. Every prediction model predict increase of rainfall during the next week.
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Tuesday, October 6, 2015

El Nino persists in Pacific as Indian Ocean stays warm

The current El Niño Pacific Ocean warming event is producing sea surface temperatures not seen since the 1997–98 event while the Indian Ocean remains exceptionaly warm, according to the Australian Bureau of Meteorology (BoM).

Tropical Pacific sea surface temperatures are more than 2 °C above average, exceeding El Niño thresholds by well over 1 °C. Most international climate models surveyed by the BoM indicate El Niño is likely to peak towards the end of 2015 and persist into 2016, a story published by the reportingclimatescience.com yesterday.

The tropical Pacific ocean and atmosphere are reinforcing each other, maintaining a strong El Niño that is likely to persist into early 2016. Tropical Pacific sea surface temperatures are more than 2 °C above average, exceeding El Niño thresholds by well over 1 °C, and at levels not seen since the 1997–98 event. In the atmosphere, tropical cloudiness has shifted east, trade winds have been consistently weaker than normal, and the Southern Oscillation Index (SOI) is strongly negative.

Most international climate models surveyed by the Bureau of Meteorology indicate El Niño is likely to peak towards the end of 2015. Typically, El Niño is strongest during the late austral spring or early summer, and weakens during late summer to autumn.

The Indian Ocean Dipole (IOD) is in a positive phase, having exceeded the +0.4 °C threshold for the past 8 weeks. Recent values of the IOD index have been at levels not seen since the strong 2006 positive IOD event. Conversely, the Indian Ocean remains very warm on the broader scale.

Four out of five international models suggest the 2015 positive IOD event will persist until November, when it typically breaks down due to monsoon development.

El Niño is usually associated with below-average spring rainfall over eastern Australia, and increased spring and summer temperatures for southern and eastern Australia. A positive IOD typically reinforces the drying pattern, particularly in the southeast. However, sea surface temperatures across the whole Indian Ocean basin have been at record warm levels, and appear to be off-setting the influence of these two climate drivers in some areas.

Warm anomalies persist along the equator from the South American coast to the Date Line and across most of the Pacific Ocean east of the Date Line in the northern hemisphere. Compared to two weeks ago, sea surface temperature (SST) anomalies have increased slightly in the eastern equatorial Pacific and remain similar in the central and western equatorial Pacific.

Anomalies for the week ending 27 September 2015 exceed +2 °C across most of the equatorial Pacific east of 170°W. Warm anomalies are also present in areas to Australia’s west, and across the majority of the Indian Ocean.

All five NINO indices remain above +1 °C this week, and both NINO3 and NINO3.4 remain at or above +2 °C. NINO3 and NINO3.4 were last at these levels during the 1997–98 El Niño.

Source: www.island.lk

Friday, October 2, 2015

Weekly Hydro-meteorological Report, 1 October, 2015


Highlights:


Up to 40 mm rainfall was observed in south western, western and north eastern regions of the country during the time period 22nd-28th September. Ocean near Kalutara received heavy rainfall up to 160 mm on 25th September and Galle received heavy rainfall up to 120 mm on 28th September. Every prediction model predict decrease of rainfall during the next week.
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Weekly Hydro-meteorological Report, 23 September, 2015


Highlights:


Up to 30 mm rainfall was observed in southern and western regions of the country during the time period 15th-21st September. Southern region of the country received heavy rainfall on 18th September up to 80 mm. Every prediction model predict high rainfall in eastern and south western regions during the next week.
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Thursday, September 17, 2015

Weekly Hydro-meteorological Report, 17 September, 2015


Highlights:


Up to 30 mm rainfall was observed in few parts of the country during the time period 8th-14th September. Rainfall was mostly observed in western and south western regions of the country. Western region of the country received heavy rainfall on 10th September up to 70 mm. Every prediction model predict high rainfall in western and south western regions during the next week.
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Thursday, September 10, 2015

Weekly Hydro-meteorological Report, 10 September, 2015


Highlights:


Up to 40 mm rainfall was observed in various parts of the country during the time period 1st-7th September. Rainfall was mostly observed in northern and north central regions of the country. The entire country received rainfall on 3rd September where Badulla received rainfall up to 100 mm. Trincomalee and southern region of Moneragala received 70 mm rainfall on 6th September. Every prediction model predict high rainfall in western and south western regions during the next week.
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Thursday, September 3, 2015

Weekly Hydro-meteorological Report, 03 September, 2015


Highlights:


Up to 40 m rainfall was observed in various parts of the country during the previous week. Rainfall was mostly observed in the south western region of the country and also in the northern region. Every prediction model predict an increase in rainfall during the next week. Heavy rainfall events are also predicted in Polonnaruwa district during the next week.
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Thursday, August 27, 2015

Weekly Hydro-meteorological Report, 27 August, 2015


Highlights:


High amounts of rainfall was observed in the previous week in the northern region of the country. The rest of the country received mostly light rainfall in the previous week with some exceptions where heavy rainfall was observed. Many rainfall prediction models predict heavy rainfall in western, south western and southern regions of the country as well as the southern sea in the next few days.
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Thursday, August 20, 2015

Weekly Hydro-meteorological Report, 20 August, 2015


Highlights:


SSignificant amount of rainfall was only observed in north central and central regions of the country on the 15th and 16th August with up to 70 mm magnitude. The rest of the country did not receive much rainfall. Dry conditions were observed in the northern, western and eastern regions of the country. NOAA models predict rainfall in south western and central regions of the country in the next fortnight.
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Thursday, August 13, 2015

Weekly Hydro-meteorological Report, 13 August, 2015


Highlights:


Significant amount of rainfall was only observed in south western region of the country on the 8th. Other than that the rest of the country did not receive much rainfall. Dry conditions were observed in the northern region of the country. In the next two weeks high rainfall is not expected in any part of the country. However there shall be light rainfall in most parts of the country.
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Thursday, August 6, 2015

Weekly Hydro-meteorological Report, 6 August, 2015


Highlights:


South western, south eastern and north eastern regions of the country received rainfall while rest of the country did not receive significant amount of rainfall on 28th July – 3rd August 2015. Rainfall up to 50 mm observed in the ocean near Trincomalee and on 29th July, rainfall up to 90 mm was observed in Trincomalee and rainfall up to 80 mm was observed in Moneragala and Ampara. NOAA models predict high rainfall in south western, northern and central regions of the country in the next fortnight.
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Thursday, July 23, 2015

Weekly Hydro-meteorological Report, 23 July, 2015


Highlights:


Southern region and the ocean near southern province mostly received rainfall up to 10-50 mm during 14th July – 20th July 2015. Rainfall up to 20-30 mm observed in the ocean near Southern and south western regions on 15th, 16th, 17 and 18th July. Rainfall up to 30 mm observed in Kegalle and Nuwara-Eliya on 19th July and on 20th July and rainfall up to 30 mm observed in southern province and in the ocean near southern province. NOAA models predict high rainfall in south western region of the country in the next fortnight.
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Thursday, July 16, 2015

Weekly Hydro-meteorological Report, 16 July, 2015


Highlights:


During 8th July – 14th July 2015 Western and Southern provinces mostly received rainfall up to 20-50 mm. On 10th July rainfall up to 125 mm was observed in the ocean near Matara while 50 mm rainfall was observed in Ratnapura and Kalutara. Rainfall up to 70 mm was observed in the southern region of Nuwara Eliya on 11th July. NOAA models predict high rainfall in south western region of the country in the next fortnight.
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Thursday, July 9, 2015

Weekly Hydro-meteorological Report, 09 July, 2015


Highlights:


During 30th June – 6th July 2015 Western, Eastern and Southern provinces mostly received rainfall up to 20 mm. Rainfall up to 20 mm was observed in Western, North Western, Eastern and Uva provinces on 30th June and 1st July. On 2nd July western region of Ampara received rainfall up to 30 mm and on 4th July heavy rainfall up to 70 mm was observed in the ocean near Galle. NOAA models predict high rainfall in south western and southern regions of the country in the next fortnight.
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Thursday, July 2, 2015

Weekly Hydro-meteorological Report, 02 July, 2015


Highlights:


During 24th – 30th July 2015 Western and Eastern provinces mostly received rainfall up to 20-50 mm. On 26th and 28th June, rainfall up to 30 mm was observed in Western province and the ocean near Western province. Rainfall up to 50 mm was observed in Ampara on 29th June. NOAA models predict high rainfall in south western and southern regions of the country in the next fortnight. MJO is in phase 7 and this shall lead to a suppression in rainfall significantly.
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Thursday, June 25, 2015

Weekly Hydro-meteorological Report, 25 June, 2015


Highlights:


During 16th – 22nd June 2015 Western, Central and Sabaragamuwa provinces mostly received rainfall up to 20-45 mm. In 16th, 17th, and 18th June, rainfall up to 30 mm was observed in the ocean near Western, Eastern, Northern and Southern provinces. Rainfall up to 45 mm was observed in Kalutara, Ratnapura, Nuwara Eliya, and Kegalle on 16th and 18th June. Rainfall was decreasing in the end of the week. NOAA models predict high rainfall in south western and southern regions of the country in the next fortnight.
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Thursday, June 18, 2015

Weekly Hydro-meteorological Report, 18 June, 2015


Highlights:


During 10th – 16th June 2015 Western, Central and North provinces received rainfall up to 20-40 mm. In 11th, 15th, and 16th June, rainfall up to 30 mm was observed in the ocean near Western and Eastern provinces. Rainfall up to 30 mm was observed in Vavuniya, Galle, Puttalam, Kurunegala, Badulla, Kalutara, Nuwara Eliya, Ratnapura and Western province on 10th, 11th, 14th, 15th and 16th June. NOAA models predict high rainfall in Western region of the country in the next fortnight.
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Monday, June 15, 2015

Weekly Hydro- Meteorological Report for Sri Lanka Subscription




Weekly we are sending out Monitoring and Climate Prediction Report for Sri Lanka it contains- Daily satellite derived Rain fall Estimates, 10 day Satellite derived Rainfall Estimates,Rainfall Forecast, Weekly Average Anomalies,14 day predictions WRF model this forecast is done by Regional Meteorological Center, Chennai,Seasonal and weekly Precipitation Predictions forecast developed by International Research Institute for Climate and Society (IRI) and more.


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Thursday, June 11, 2015

Weekly Hydro-meteorological Report, 11 June, 2015


Highlights:


During 2nd – 8th June 2015, high rainfall was received throughout the week in Eastern, Western, Central and North Central provinces up to 20-40 mm. In 3rd, 5th, and 7th June, heavy rainfall up to 85 mm was observed in Polonnaruwa, Moneragala and Ampara districts. In 6th June, heavy rainfall of 120 mm was observed in the ocean near Trincomalee district. NOAA models predict high rainfall in Western and Eastern provinces in the next fortnight.
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Friday, June 5, 2015

Weekly Hydro-meteorological Report, 04 June, 2015


Highlights:


During 27th May – 2nd June 2015, high rainfall was observed towards the end of the week which was an increase when compared to the previous week. In the beginning of the week there were no rain in any part of the country and the Eastern and Uva provinces observed rainfall up to 70 mm/day from 30th May. Highest rainfall of 70 mm was observed in Ampara. Central, Sabaragamuwa, North Eastern and North Western provinces also received rainfall up to 10-30 mm/day. NOAA models predict high rainfall in Eastern, South Eastern and Western provinces in the next fortnight.
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Thursday, May 28, 2015

Weekly Hydro-meteorological Report, 28 May, 2015


Highlights:


During 20th – 26th May 2015, only slight amounts of rainfall was observed throughout the country. Rainfall was only observed in the south western region during this period. However NOAA models predict high rainfall in the north western region of the country in the next fortnight while rainfall in the south western region is expected in the next few days. The MJO has been weak for some time now and therefore no influence on the rainfall from MJO is expected.
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Thursday, May 21, 2015

Weekly Hydro-meteorological Report, 21 May, 2015


Highlights:


Relatively high rainfall was observed during 12th- 18th May 2015 in Sri Lanka. Heavy rainfall was observed in Vavuniya and Puttalam districts during this period. The rest of the country received up to 30 mm rainfall as well. NOAA models predict a continuation in high rainfall during the next two weeks
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Thursday, May 14, 2015

Weekly Hydro-meteorological Report, 14 May, 2015


Highlights:


AA rainfall around 10 - 130mm rainfall was received throughout the week in entire country during 6 th May to 12 th May 2015. In the first two days of the week the rainfall was around 10-30mm and Kurunegala, Matale and Vavuniya districts received the highest rainfall of 130mm in the end of the week. The entire country received heavy rains on 10 th May and the heavy rains were gradually increased up to 30-40mm in northern region while the central and southern region of the country received the average rainfall of 10-20mm. NOAA predicts a continuation of high rainfall in Sri Lanka in the next two weeks.
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Thursday, May 7, 2015

Weekly Hydro-meteorological Report, 7 May, 2015


Highlights:


Around 15- 20 mm rainfall was observed throughout the country during 29th April to 5th May 2015. A random increase and decrease in rainfall was observed during this period. Above average rainfall was observed throughout the country during April except in north eastern regions of the country. NOAA predicts a continuation of high rainfall in Sri Lanka in the next two weeks.
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Thursday, April 30, 2015

Weekly Hydro-meteorological Report, 30 April, 2015


Highlights


The entire country received heavy rainfall during 22 nd - 28 th April but not continuously. Mre rainfall was observed on the western side of the country compared to the eastern side. Heavy rainfall is once again predicted in the region around Badulla by IRI CFS models. The MJO remained in a weak state for the third continuous week and therefore shall not influence the rainfall in Sri Lanka.
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Friday, April 24, 2015

Weekly Hydro-meteorological Report, 23 April, 2015


Highlights


Heavy rainfall continued in the western side of the country with Kaluthara and Galle districts receiving more than 250 mm rainfall in the past week. In addition to this Kurunegala, Puttalam, Colombo, Gampaha, Kegalle districts also received heavy rainfall. According to NOAA predictions the south western regions shall receive more rainfall in the next two weeks.
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Thursday, April 16, 2015

Weekly Hydro-meteorological Report, 16 April, 2015


Highlights


Heavy rainfall was observed in Sri Lanka in South western and Mannar regions which reached up to 140 mm in magnitude. NOAA models predict very heavy rainfall in the next 6 days in Badulla region.
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Weekly Hydro-meteorological Report, 09 April, 2015


Highlights


Heavy rainfall continued during the previous week with the highest rainfall observed in Puttalam and Kurunegala. Rainfall shall continue in the next week with more rainfall on the western side of the country. IMD WRF model predict heavy rainfall in the next two days while the NOAA NCEP model predicts a low amount of precipitation in the next 14 days.
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Monday, April 6, 2015

Weekly Hydro-meteorological Report, 02 April, 2015


Highlights


Both dry and wet conditions were observed during the past week (23 rd March – 29th March). The IMD WRF model predicts 3-day rainfall throughout the country ranging between 1–60 mm from 31 st March – 13th April 2015. NCEP GFS model predicts dry conditions from 31 st - 6th April; and precipitation between 15-25 mm from 7th – 14th April.
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Thursday, March 26, 2015

Weekly Hydro-meteorological Report, 26 March, 2015


Highlights


No rainfall was observed during the previous weeks but many climate models predict rainfall during the next week. NOAA/ CFS model predicts up to 100 mm total 6 day-rainfall in Badulla area in the next few days without any heavy rainfall events.
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Thursday, March 19, 2015

Weekly Hydro-meteorological Report, 19 March, 2015


Highlights


Once again rainfall was observed during the previous week following a dry week. The entire country received rainfall during the week. NOAA NCEP and IRI models predict dry conditions in the next week.
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Thursday, March 12, 2015

Weekly Hydro-meteorological Report, 12 March, 2015


Highlights


Dry condition were observed in the past few days throughout the country except in south-western region of the country. This is likely to change in the next few days as N OAA NCEP models predict high precipitation in the next week.
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Wednesday, March 4, 2015

Weekly Hydro-meteorological Report, 4 March, 2015


Highlights


Rainfall increased significantly during the last week with rainfall reaching magnitude of 100 mm reporting in Kurunegala and Ampara districts. The average rainfall during the February was above average in most parts of the country. Rainfall is expected to increase further during the week after 10 th of March.
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Thursday, February 26, 2015

Weekly Hydro-meteorological Report, 26 February, 2015


Highlights


In previous week significant rainfall was observed during 22 nd to 24 th in all most all parts of the country. Highest rainfall for the week was observed on 23 rd in Tricomalee area around 95 mm. Rainfall is expected to increase during 26 th February to 3 rd March for the entire country and further during 4 th to 10 th March.
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Thursday, February 19, 2015

Weekly Hydro-meteorological Report, 19 February, 2015


Highlights


During past week significant rainfall was only observed between 11 th to 13 th in western, southern, eastern and central areas averaging up to 10 mm. Highest rainfall for the week was observed on 12 th February in Ratnapura around 60 mm. During 18 th to 23 th rainfall can be observed in northern and western areas.
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Thursday, February 12, 2015

Weekly Hydro-meteorological Report, 12 February, 2015


Highlights

Monitoring and Prediction

As predicted earlier by NOAA NCEP models, there has been rainfall since the end of January in various parts of the country. Based on IRI models, during 11 th to 16 th eastern, uva, sabaragamuwa, central and southern regions shall receive rainfall averaging up to 50 mm with highest expected rainfall in Badulla area averaging up to 75 mm. But NOAA NCEP models have provided a contradictory prediction which says that there shall be no rainfall during the next week and the week after. The sea around Sri Lanka continue to show neutral sea surface temperature.
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Thursday, February 5, 2015

Weekly Hydro-meteorological Report, 5 February, 2015


Highlights

Monitoring and Prediction

Roughly entire country received rainfall during the past week averaging up to 20 mm. Some rainfall can be further expected between 6 th to 10 th February but thereafter a dry condition can be expected all over the country.
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Thursday, January 29, 2015

Weekly Hydro-meteorological Report, 29 January, 2015


Highlights

Monitoring and Prediction

During the past week there was limited rainfall. Rainfall is forecasted upto toals of 50 mm for the week between 28th January to 3rd February – but the predictions are at a lower value than provided with two weeks lead in the last issue. Some rainfall can be further expected during 4th to 10th February. The February to April season has a high chances of being warmer than usual.
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