Phone:(+94)81-2376746,4922992   E-mail:climate@sltnet.lk     Website: http://www.climate.lk

Friday, November 30, 2012

Weekly Hydro-meteorological Report, 29 November 2012


Highlights

Monitoring and Prediction
Monitoring: Heavy rains have persisted in Sri Lanka since the start of October – this as expected during a positive Indian Ocean Dipole mode phase (with warmer sea surfaces in the Arabian seas). Prediction: Rainfall shall be higher than normal for the rest of November. During December, since the IOD influence is minimal, the rainfall is likely to be near normal. Warmer than normal temperatures persist due to the warm Arabian sea surface anomalies.

Download Full Report

Tuesday, November 27, 2012

Weekly Hydro-meteorological Report, 22 November 2012


Highlights

Monitoring and Prediction
Monitoring: Heavy rains have persisted in Sri Lanka since the start of October – this as expected during an El Nino phase and a positive Indian Ocean Dipole mode phase (with warmer sea surfaces in the Arabian seas). Prediction: Rainfall shall be higher than normal for the rest of November. During December, since the El Nino state tends toward neutral and the IOD influence is minimal, the rainfall is likely to be near normal. Warmer than normal temperatures persist due to the warm Arabian sea surface anomalies.

Download Full Report

Weekly Hydro-meteorological Report, 20 November 2012


Highlights

Monitoring and Prediction
Monitoring: Heavy rains have persisted in Sri Lanka since the start of October – this as expected during an El Nino phase and a positive Indian Ocean Dipole mode phase (with warmer sea surfaces in the Arabian seas). Prediction: Rainfall shall be higher than normal for the rest of November. During December, since the El Nino state tends toward neutral and the IOD influence is minimal, the rainfall is likely to be near normal. Warmer than normal temperatures persist due to the warm Arabian sea surface anomalies.

Download Full Report

Tuesday, November 20, 2012

Weekly Hydro-meteorological Report, 08 November 2012


Highlights

Monitoring and Prediction
Monitoring: During the last week (31st October-6th November), heavier than usual rainfall (upto 165 mm) was received particular in the South-West. Predictions: In the coming week, rainfall of up to 135 mm is expected with less in the North. The El Nino is weakening but the Indian Ocean Dipole continues to favour heavier than normal rainfall till December.

Download Full Report

Thursday, November 8, 2012

Extreme weather creating urgent need for better forecasts

Source: www.trust.org

By Amantha Perera

VAVUNIYA, Sri Lanka (AlertNet) – Since returning to farming after decades of displacement during Sri Lanka’s long civil war, Kusmalatha Tammitta has faced a new enemy: extreme weather, particularly long droughts followed by bursts of heavy rain.

Read More on AlertNet

Friday, November 2, 2012

Tropical Cyclone hitting Sri Lanka, South India


A tropical depression over the southwestern Bay of Bengal will gain tropical cyclone status as it makes its way west to the south coast of India.
Flooding rain and damaging winds will threaten parts of Sri Lanka and southeastern India along and near the path of this low.
Seas will be dangerous for fishing boats and other small vessels.

Read More at http://www.accuweather.com/en/weather-blogs/andrews/tropical-cyclone-hitting-sri-lanka-south-india/834487

Weekly Hydro-meteorological Report, 01 November 2012


Highlights

Monitoring and Prediction
The tropical storm that started to the West of Sri Lanka propagated North-Westwards drenching the Northeastern seaboard in particular and the rest of the island considerably as well as it intensified to cyclonic speeds. This is an early start to the cyclone that usually lasts from November till February– there has only been one that has made landfall in Sri Lanka recorded during October for the past 140 years. The anomalously warm sea surfaces to the east of Sri Lanka is one of the factors that contributes to enhanced cyclogenesis. The forecasts for the next week are for continued wet weather but only reaching a weekly accumulation of about 75mm..

Download Full Report

Weekly Hydro-meteorological Report, 25 October 2012


Highlights

Monitoring and Prediction
The drought during the Yala season abated at the start of September and now as is seasonable with the start of the Maha season, we have heavy rainfalls. For the same reasons that Yala was drought ridden (warm Central Indian Ocean and Pacific Ocean surface temperatures), Sri Lanka and the sea towards eastern Africa is likely to have a wetter and warmer period till December.

Download Full Report