Somalia Rainfall Forecast – Issued 29 May 2024

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Weekly Rainfall Forecast: According to ICPAC, during the week between 28 May to 3 June 2024, dry conditions are expected in most inland parts of the country with chances of light rainfall over coastal parts of the southern regions (Map 1). Given that this forecast week represents the transition out of the Gu season, it is important to mention that, according to ICPAC, above-normal Hagaa rainfall conditions are expected over Lower Juba, Middle Juba, Lower Shabelle, and Awdal regions. On the other hand, Togdheer and Sool-Sanaag regions are likely to experience drier-than-normal Hagaa conditions. Evolution of Rainfall Drivers: As the Inter Tropical Convergence Zone (ITCZ) shifts further north, its impact on the Gu rains across the country begins to diminish ushering in Hagaa season. As the ITCZ shifts further north, a low-pressure system will be set up in Indian Sub-continent triggering the Southwest monsoon winds. As the winds blow from land into the Ocean (westerly land breeze) between 3:00 am and 9:00 am in the morning they converge with the prevailing easterly winds aiding lifting of warm and moist air causing the morning showers observed and forecast over the coastal parts of southern regions including Banadir. The forecast shift in the position of Madden Julian Oscillation’s (MJO) index from the Indian Ocean re-affirms the forecast dry conditions inland and a reduction in the intensity of the morning coastal showers in the coming days. This shift is also likely to lead to a reduction in the cyclonic activity in the southwestern Indian Ocean and favor such disturbances in the northern Indian Ocean particularly Bay of Bengal.
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Date of publication: 
May, 2024