Moderate to heavy rains continued in many parts of Somalia. The Ethiopian highlands also continued to receive heavy rains in the last few days. The cumulative rainfall forecast for the next three and seven days is calling for moderate to heavy rains across the country as well as within the Ethiopian highlands.  The foreseen heavy rains may lead to a further increase in river flow along the Juba and Shabelle Rivers in Somalia, translating to a high risk of flooding along the two rivers. Areas to watch out for river flooding include the entire channel of Shabelle River as well as Gedo and Middle Juba regions along the Juba River. Flash floods are expected in built-up and low lying areas of Bay, Bakool and central regions given the forecast.

The Deyr rainy season continued to spread in space and magnitude during the last week. The last two days saw heavy rains in parts of Juba and Shabelle basins with some stations recording more than 100mm of rainfall. The Ethiopian highlands also received very heavy rains in the last few days. This has consequently led to increased river levels along the Juba and Shabelle Rivers both in Ethiopia and Somalia with some cases of river flooding. River levels along the Shabelle remained high in the last few weeks and continued to increase following the heavy rains. Unofficial field reports further indicate flooding in parts of Mustahil and Kalafo within the Shabelle basin in Ethiopia. The flood wave is expected to be transmitted downstream in Somalia in the coming few days leading to a further increase of river levels that may cause flooding along the River. Observed river levels of the Juba River which have been low in the previous week rose drastically in the last 24 hours. At Dollow and Luuq stations in Gedo region, there was 2m rise in the last 24 hours. Riverine flooding and flash floods have been reported in Dollow and the surrounding areas. The rainfall forecast for the coming week is calling for increased rainfall activities in many parts of the country including the Juba and Shabelle basins both in Ethiopia and Somalia. There is therefore high risk of flooding during this week along the two rivers given the current situation. Areas to watch along the Shabelle River include Jowhar town and its environs; where the river level is currently near bankfull level and other riverine towns in the lower Shabelle region. The situation could be further exacerbated by weak river embankments and open river banks. Other areas to watch along the Juba include Dollow and the mid reaches of the River.

Moderate to heavy rains continued in many parts of Somalia and within the Ethiopian highlands over the last one week. River levels at Belet Weyne (Shabelle) are currently very high and the trend is expected to continue reaching over bank in the coming few days. Along Juba, the river levels are also high. The cumulative rainfall forecast for the coming week is calling for moderate to heavy rains across the country as well as the Ethiopian highlands. The river levels will therefore continue to rise with a high risk of flooding along the entire two channels. Flash floods are expected in built-up and low lying areas of Bay, Bakool and central regions given the forecast.

Observed river levels along the Shabelle River in Somalia remained above the average at this time of the year since mid August following moderate to heavy rains in the upper parts of Ethiopian Highlands. The levels at the upper reaches of the river inside Somalia (Hiraan Region at Belet Weyne and Bulo Burti) increased sharply over the last three weeks, but have started to decrease in the last few days. Current river levels in the mid and lower reaches (Middle and Lower Shabelle regions) are significantly above the normal levels at this time of the year with some sections at Mahadey Weyne, Jowhar and Balcad districs experiencing over spillage leading to floods. River levels along Juba are within normal for this time of the year.

The Deyr 2019 rainy season (September-December) has kicked off in some parts of the country. Parts of the north eastern regions started to receive rains in mid-September. The last 24 hours also saw moderate rains in parts of the Gedo region in the south. The rains are expected to continue spreading in time and space during the coming weeks with the season scheduled to end in November and early December. The cumulative rainfall forecast for the next three days indicates light to moderate rains in scattered areas of the country, especially within Sool and Sanaag regions. The rains will then spread further as the week progresses with more intensity in the northern areas. The upper parts of the Ethiopian highlands will also receive good rains towards the end of the week. Most parts of the south and central areas will remain dry in the coming week. Given the rainfall forecast and the existing high river levels along the Shabelle, there is a moderate risk of flooding in the middle reaches of the river. Areas to watch out for floods include Mahadey Weyne, Jowhar, and Balcad districts riverine areas where there exist several open river banks and weak river embankments.

The cumulative rainfall forecast for the coming week indicates moderate rains in the northern areas and parts of South and central regions bordering Ethiopia. The upper parts of the Ethiopian highlands will also receive good rains during the week. Given the rainfall forecast and the existing high river levels along the Shabelle, there remains a moderate risk of flooding in the middle reaches of the river. Areas to watch out for floods include Mahadey Weyne, Jowhar, and Balcad districts riverine areas where there exist several open river banks and weak river embankments. River levels along the Juba are expected to rise at the week with no risk of flooding.

Observed river levels of the Shabelle River in Somalia have been rising for the past two weeks. This has been attributed to heavy rains in the upper parts of the Ethiopian highlands and localized rains in Lower Shabelle. The current Shabelle river levels at the upper reaches inside Somalia (Hiraan Region at Belet Weyne and Bulo Burti), are slightly above the normal range, while the mid and lower reaches (Middle and Lower Shabelle regions) are significantly above the normal levels at this time of the year. This has resulted in over bank spillage leading to riverine floods in parts Middle Shabelle. The ongoing assessment of river breakages along the Shabelle River using Very High Resolution (VHR) Satellite images, has identified several open points along the River, these open points continue to pose a threat of flooding and need immediate closure before the coming Deyr rainy season which is expected in October 2019. The river breakage analysis is being finalized and will be shared once complete. There is a high risk of flooding in the mid and lower sections of the Shabelle river especially in areas with open river banks. The Food and Agriculture Organization’s Somalia Water and Land Information Management (FAO SWALIM) is pleased to share with you a Flood Advisory for Middle and Lower Shabelle.

The Deyr rains are usually shorter and less in quantity than the Gu rains. However, they are beneficial in supporting agricultural activities and boosting water availability for different uses. Generally the season starts in late September and ends in November/December. Nevertheless, this varies from place to place across the country with the northern parts usually receiving the rains much earlier than the southern parts. According to the recently issued consensus climate outlook for the Greater Horn of Africa (GHACOF53), the 2019 Deyr rainy season in Somalia is expected to be wetter than normal in most areas with warmer than usual temperatures across the whole country. The rainfall forecast indicates 45% to 55% probability of above average rains in the south, central and most parts of the northern regions. This also includes the Ethiopian highlands which contribute significantly to both Juba and Shabelle river flow inside Somalia. Some areas in the north western parts including Awdal, Woqooyi Galbeed and parts of Togdheer regions are expected to have normal to below normal rains as seen in Map 1. The regional forecast further indicates a possibility of a drier than normal month of September and a delayed start of the season in Somalia with dry spells of more than 10 days after the start of the season. The expected good rains will boost crop production and replenish pasture and water sources in most parts of the country thus reducing water stress significantly. This will bring relief to many parts of the country that had recorded below average rains during the 2019 Gu (April—June) and 2018 Deyr (October-December) rain seasons. Communities, government and intervening agencies are advised to take advantage of the expected good rains to harvest rain-water for the future using simple technologies. On the downside, riverine flooding along the Juba and Shabelle rivers is likely to occur especially in the middle and lower reaches of the two rivers. Existing open river banks and weak embankments can worsen the situation. Flash floods are likely to occur in low lying and built up areas. The expected below normal rains in the north western regions will lead to further depletion of pasture and water resources with high likelihood of mild to moderate drought conditions. Replenishing of the surface water points may be minimal and therefore communities should use the available resources sparingly. These areas are currently experiencing abnormally dry conditions following the poor performance of the last two rainy seasons. Conflict over the scarce resources cannot be ruled out. This is a consensus forecast designed for a regional audience that addresses the rainfall totals summed over the three‐month period from October to December 2019. Local and month-to-month variations might occur as the season progresses. Sporadic rainfall events leading to flash floods are likely to occur even in areas with increased likelihood of near to below normal rainfall. Also, dry spells might occur in areas where enhanced rainfall is foreseen. FAO, through SWALIM and its technical partners, will keep updating this forecast for shorter lead time periods and share updating information throughout the rainfall season.

The Overall 2019 Gu season rainfall performance was normal to below normal in terms of amount but highly erratic and poorly distributed. The rains started a month late in most areas leading to a prolonged dry period in some areas and moderate drought conditions in others especially during March and April. The last half of May saw increased rainfall activity, including heavy storms that lasted a few hours and distributed within a period of less than ten days during the whole season. Some places received more than 200mm of rainfall especially in the southern regions and a few pockets of Somaliland which is normal for this season. Bari region and the east parts of Sool and Sanag regions in the north recorded the least amounts of rainfall of 30 to 75 mm.

The Food and Agriculture Organization’s Somalia Water and Land Information Management (FAO SWALIM) Project, has finalised the analysis and mapping of the river breakages along the Juba and Shabelle rivers using very high resolution satellite imagery. Breakages identified in the map have been classified into six different categories; Open, Overflow, Potential Overflows, Potential breakages, Closed with sandbags and Closed. A legend/Key for further explanation of the different types of breakages is provided here A total of 84 Open points have been identified, 39 on the Shabelle River and 45 on the Juba River which require immediate attention. Due to the low Gu rainfall, no new overflow points were identified as the river levels did not reach overflow threshold. However some overflows could be expected when river level rises above the normal rate. Several other points, which are either potential or temporarily closed with sandbags, have also been identified. The ongoing rains in the upper parts of the Ethiopian highlands have resulted to increased river levels in the lower reaches of the Shabelle River, causing floods in some areas of Jowhar and Balcad districts. With the rainfall outlook indicating above normal rains during the October - December Dery rain season, river levels are expected to increase with a likelihood of flooding especially where open and potential points have been identified. There is therefore an immediate need to close the open points and reinforce areas where there are weak river embankments. Temporary measures can be taken before the season begins. SWALIM is pleased to share with you maps and tables of the status of river breakages along the two rivers. Hardcopies can be obtained from FAO SWALIM offices. It is worth noting that the methodology is biased towards Remote Sensing (RS) interpretation with only limited “ground truthing” due to access constraints. Open breakages and overflows might have been omitted or classified as potential in some cases where satellite images were not available or may not have been very clear due to heavy cloud cover and dense vegetation cover.