The 2015 Deyr rainy season was generally good with many areas in Somalia recording normal to above normal rains with exception of the western parts of Somaliland, central Puntland and parts of Gedo region in the south that recorded below normal rains. The season started off well in early October in some areas and continued to spread spatially with a peak during the last two weeks of the month. In some parts of the South and central regions El nino phenomena caused very heavy rains leading to both flash floods and riverine flooding affecting over 140 000 people. The unusual heavy rains were also beneficial to most sectors. During the first week of November, the north eastern coastline was hit by two tropical storms (Chaplla and Megh) which led to loss of livestock and destruction of property. There were also cases of flooding along the storm path and close to 70,000 people were affected.

During the week that ended on 30th November 2015, there was a further reduction of rainfall activities in most areas of Juba and Shabelle basins inside Somalia as well as the Ethiopian highlands compared to the previous week. However, a few stations in Middle and Lower Shabelle regions recorded moderate rains. Satellite rainfall estimates also indicates reduction of rainfall amounts during the same period within the Juba and Shabelle basins. The rainfall forecast for the coming week indicates a possibility of moderate rains in Gedo, and the Jubas as well as the coastal areas of Lower Shabelle. The risk of flooding in the lower reaches of Shabelle changes to moderate due to the existing open and weak river banks and observed high river levels in the areas while the flood risk level for Juba changes to minimal during the coming week.

During the last dekad of November, (21st – 30th November 2015), there was a general reduction of rainfall activities across the country with most stations recording little or no rains. However, a few stations recorded moderate rains especially in Middle and Lower Shabelle Regions. Figure (1) shows the rainfall observational network and monthly rainfall distribution for selected stations across the country. This update will be issued every 10-days throughout the Deyr rainy season.

During the week that ended on 7th December 2015, there was a further reduction of rainfall activities in most areas of Juba and Shabelle basins inside Somalia as well as the Ethiopian highlands compared to the previous week. However, a few areas in Lower Shabelle region recorded moderate rains which led to river floods and flash floods towards the end of the week. Satellite rainfall estimates also indicates reduction of rainfall amounts during the same period within the Juba and Shabelle basins. The rainfall forecast for the coming week indicates a possibility of moderate rains in Lower Juba and Lower Shabelle regions. The risk of flooding in the lower reaches of Shabelle changes to minimal given the rainfall forecast for coming week and the decline of river levels in the last one week. The flood risk level for Juba changes to minimal during the coming week.

Moderate to heavy rains are expected along the central and southern coastal areas of Somalia in the next three days. Other areas in the south will receive light to moderate rains in the same period; while most of the northern regions will remain dry. The upper catchments of Juba and Shabelle basins in Ethiopia are expected to receive minimal rains during the forecast period.

Heavy rains reported in Puntland as tropical storm MEGH passes the northern coast of the country. The north eastern parts of Somalia experienced extreme weather in form of a tropical storm since 8th November 2015. The tropical storm named MEGH was associated with strong winds and heavy rains in some parts of Puntland with most stations recording more than three times their long term mean annual rainfall. For instance, Eyl recorded a total of 160mm while Allula received 154mm in a single day.

Wet conditions are expected to persist in the next three days in the Ethiopian highlands and Juba & Shabelle river basins inside Somalia with a possibility of river level increase. The northern parts of the country will remain dry during the forecast period.

During the week that ended on 9th November 2015, wet conditions persisted in most areas of Juba and Shabelle basins inside Somalia as well as the Ethiopian highlands. Most stations within the Juba and Shabelle river basins recorded moderate to heavy rains within the week. River levels in some sections of middle and lower reaches of Shabelle River are currently at full crest while the upper reaches of Jubba have increased sharply over the last few days and this is expected to reach the lower reaches in the next two days. Given the rainfall forecast and the current river levels, there remains a high risk level of flooding along the middle and lower reaches of Shabelle. A high risk of flooding is also foreseen in the lower reaches of Juba River especially in locations where there exists open river breakages given the rainfall forecast, high river levels and existing open river breakages.

Little or no rains are foreseen in the coming three days inside Somalia. However, a few pockets in Bari, Sool and Sanaag in the north and Lower Juba in the south may record moderate rains during the forecast period.

Light to moderate rains spread across many southern and central parts of Somalia are expected in the next three days. The northern parts of the country including Togdheer, Sool and Sanaag are expected to receive moderate rains over the same period. The upper catchment of the Shabelle River in Ethiopia will receive high rains as well, which translates to increase in river levels later in the week.