East Africa Seasonal Monitor: November 10, 2017

by admin | Monday, Nov 13, 2017 | 40 views

Deyr rains performed poorly in October in southern Somalia, with increases in early November


  • The onset of the Deyr (October to December) season was significantly delayed over parts of southern and central Somalia by 20-30 days. Rainfall totals in October were less than 50 percent of average, following by increases in rainfall during the first 10 days of November. Seasonal performance has been better in neighboring areas Ethiopia, where rainfall has been average to above average.
  • Seasonal rainfall since mid-October has been largely above average across broad areas of western and northern Kenya, Uganda, northeastern DRC, and northwestern Tanzania. Meanwhile, rainfall in southeastern Kenya, much of Burundi, and eastern DRC was below average.
  • During the coming 1-2 weeks, moderate to heavy rainfall is expected over southern and central Somalia, and parts of southeastern Ethiopia and northeastern Kenya. However, due to the delayed start of season in southern Somalia, crop growth in rainfed areas may be impacted by the shortened length of the growing season. Meanwhile, heavy rainfall is forecast over much of Uganda, western areas of Rwanda and Burundi, northeastern DRC, and northwestern Tanzania and Kenya.


The performance of Deyr (October to December) seasonal rainfall has been mixed in the eastern Horn of Africa. The onset of Deyr rainfall was significantly delayed, by 20 to 30 days, over parts of southern and central Somalia where much of Deyr rainfall (50 percent of its seasonal totals), typically occursin October. In these areas, rainfall in October was less than 50 percentage average, but following by increases in rainfall during early November. Meanwhile, in neighbouring areas of southeastern Ethiopia, seasonal rainfall totals are mostly near or above average. In northeastern and eastern Kenya, where short/Deyr rains typically get underway slightly later, rainfall has been slow to become established and early season rainfall deficits (-10 to -50 mm) have begun to develop.

Meanwhile, much of western Rwanda, eastern Burundi, and eastern DRC, were drier than normal during the past two to three weeks. Although the seasons have begun with some cumulative deficits, the rainfall amounts received have been generally sufficient for cropping.

Vegetation conditions are above average over large areas of eastern and southern Sudan, much of South Sudan, western and central Ethiopia, northeastern Uganda, and western Kenya, according to the eMODIS/NDVI (Figure 2). However, significantly below-average conditions have persisted across Somalia, southeastern Ethiopia, northeastern Kenya, parts of western Sudan, much of eastern DRC, parts of central and western Rwanda, and western Tanzania.

Cropping conditions are expected to remain mostly favorable in Ethiopia Meher-dependant areas and in South Sudan, although FAW is a concern in both and conflict in South Sudan is likely inhibiting agricultural activities. Harvest prospects in most agricultural areas of Sudan are also expected to be normal, following the above-average seasonal rainfall performance. However, below-average rains in Kassala, northern Gadaref, and parts of North Kordofan and North Darfur are likely to result in below-average yield prospects in those areas. In Kenya, the extention of seasonal rainfall beyond September and into October has been largely beneficial for cropping prospects in North Rift Valley counties, but has constrained harvesting and drying activities for maize and is likely to lead to losses.

The following is a country-by-country update on recent seasonal progress to date:

  • In Somalia, the onset of Deyr rainfall was been significantly delayed by 20-30 days in parts of southern Somalia, with October rainfall totaling less than less than 50 percent of average monthly amounts. However, rainfall increased substantially during the first 10 days of November and according to ARC2 rainfall estimates, seasonal totals may be as high as 80 percent of average. Following these rains, seasonal totals in southern Somalia appear to be at least 80 percent of average, although additional satellite-derived estimates should help assist with a convergence of evidence in the coming weeks. In addition, the significantly delayed and below-average start to the season is likely to reduce the window for rainfed crop growth and development during the Deyr season NDVI indicates significantly below-average vegetation conditions across large areas of southern Somalia, likely in response to poor October rains and the cumulative impacts of prolonged dryness across the eastern Horn since last year. FAW infestations have been reported in parts of southern Somalia, but its impacts have not yet been fully assessed. In northern Somalia, rainfall performance has remained near average, with minor rainfall deficits as the seasonal rains progress southwards.
  • In southern and southeastern Ethiopia, performance of the Deyr/Hagaya rains in October has been largely above average to average (+10 to +100 mm). Rainfall in October was spread over a fewer number of days than usual (approximately 10 days in eastern areas), but in early November, rainfall increased in frequency and intensity. Good performance of seasonal rainfall should contribute to improvements in pasture and water availability for livestock. According to NDVI, vegetation levels have increased across much of Somali region, southern Oromia, and eastern SNNPR, but vegetation levels remain below average.
  • In Kenya, the short rains began slowly in eastern and northeastern areas (Wajir, Garissa, Mandera, and Kilifi), with little rainfall until late October. During the first 10 days of November, seasonal rainfall increased substantially and has reduced rainfall deficits. In these areas, particularly Mandera, vegetations remain well below average, according to NDVI. By contrast, in northwestern areas of Kenya, including Turkana, West Pokot, and Baringo, vegetation conditions are well above average as a result persistently above normal off-season rainfall since July. These off-season rains have also occurred over the main maize growing areas of the northern rift valley (Trans-Nzoia and Uasin-Gishu) and have constrainted harvesting and drying of crops. Meanwhile, the early onset of seasonal rains by 10-20 days, in central-and south-rift valley, including central counties of Kenya, have resulted in early crop planting.
  • In Uganda, rainfall since mid-October has been mostly above average, except in central areas where rainfall was below average. The bulk of the second season harvests are expected between late November and January. Meanwhile, flood and mudslides risks remain high over the recently flooded Mt. Elgon regions. FAW infestations remain a concern in Napak and Luwero districts.
  • In Sudan, the harvesting and dry season is expected to set in November, with agricultural production prospects expected to be average in most areas of Sudan, except in Kassala and the northern parts of Gedaref, North Darfur, and North Kordofan States, where the June to September seasonal rainfall was erratic and largely below average. FAW infestations are also reported in Gadaref, Blue Nile, and Sennar states, which could result in damage to crops.
  • In South Sudan, seasonal rainfall in October was well above average in eastern regions, below-average rainfall in southwestern and northwestern areas, and near normal amounts elsewhere. NDVI suggests vegetation conditions are mostly average or above average, except in localized areas of Eastern Equatoria, northwestern Jonglei, and northern Upper Nile, where vegetation conditions are below average.
  • In much of Burundi, eastern Rwanda, and parts of eastern DRC, rainfall since early October has been below average. The crop status is at the emergence to early vegetative stages, but in favorable condition. Vegetation conditions are generally near average for much of these three countries, with a few localized areas of below average conditions.

Source: reliefweb.int

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