Global Weather Hazards Summary May 25 - 31, 2018
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Global Weather Hazards Summary May 25 - 31, 2018 Tropical Cyclone Mekunu is expected to hit Yemen and Oman next week Africa Weather Hazards Flooding Abnormal Dryness Drought Severe Drought Tropical Cyclone Potential ocust Outbreak Heavy Snow Abnormal Cold Abnormal Heat Seasonally Dry 6 4 1. Insufficient rain since 2 January has resulted in 3 large moisture deficits and below-average vegetation 5 conditions over portions of northwestern Angola. 5 2. Poorly-distributed rain since late February has resulted in abnormal dryness across central and northeastern Ethiopia. 1 3. A slow onset to seasonal rainfall across the southern Gulf of Guinea countries has led to strengthening moisture deficits throughout the region. 4. Delays in seasonal rainfall across the southern Gulf of Guinea countries has led to strengthening moisture deficits throughout the region. Source: FEWS NET/NOAA 5. Many consecutive weeks of heavy rainfall over western parts of Kenya, southern Somalia, coastal Tanzania, and Rwanda has led to severe flooding. 6. Tropical Cyclone Mekunu is expected to strengthen and track north through the Arabian Sea and impact Yemen and Oman, bringing winds and heavy rainfall. FEWS NET is a USAID-funded activity. The content of this report does not necessarily reflect the view of the United States Agency for International Development or the United States Government. The FEWS NET weather hazards process and products include participation by FEWS NET field and home offices, NOAA-CPC, USGS, USDA, NASA, and a number of other national and regional organizations in the countries concerned. Questions or comments about this product may be directed to [email protected], [email protected], or 1-301-683-3424. Tropical cyclone Sagar has impacted parts of the East Satellite Estimated Total Rainfall (mm) AfricaWeather region withHazards heavy Summary rains and winds. Valid: May 16 – May 22, May2018 25 - 31, 2018 Tropical cyclone Sagar has impacted parts of the East Africa Overview Satellite Estimated Total Rainfall (mm) AfricaTropical region Cyclone with Sagar heavy took rains a rare and path winds through. the Gulf of Aden Valid: May 16 – May 22, 2018 and made landfall in northwestern Somaliland. The storm induced Tropical cyclone Sagar lands in East Africa Tropicalheavy rains Cyclone along Sagar coastal took Yemen, a rare pathnorthern through Somalia, the G Djiboutiulf of Aden and Figure 1: RFE2 Satellite Estimated Rainfall (mm) andparts made ofTropical Et landfallhiopia. Cyclone Althoughin northwestern Sagar rainfall took Somaliland.totalsa rare were path not Thethrough well storm observed the induced Gulf inof Valid: May 16 - 22, 2018 heavythese Adenrainsareas, andalong there made co werea landfallstal numerousYemen, in northwestern northern reports Somalia,of Somaliland. flooding, Djibouti and The evenstormand partswind ofdbroughtamage. Ethiopia. Severalheavy Although rains other rainfallalong parts coastaloftotals the Eastwere Yemen, Africanot northernwell region observed received Somalia, in theseenhanced areas,Djibouti rains. there and These wereparts numerousincluded of Ethiopia., westernrepo Westernrts ofKenya, flooding,Kenya, South Southand Sudan, evenSudan, neighboring parts of Ethiopia, and Uganda. Rainfall totals exceeded wind damage.neighboring Several parts other of Ethiopia, parts of andthe EastUganda Africa also region received received above- 100mm and locally 200mm in these regions during the past 7 days enhancedaverage rains. rain. These Rainfall included totals, exceededwestern 100Kenya, mm South and locally Sudan, 200 neighbaccordingoring toparts satellite of Ethiopia, estimates and Uganda(Figure. Rainfall1). Northern totals exceeded Ethiopia mm in these regions during the past week Northern 100mmreceived and little locally rain 200mmthis week in andthese observed regions during7-day(Figure thedeficits past 1). of7 daysup to according25mm.Ethiopia Seasonal to satellitereceived dryness estimates little is rainset (tingFigure this in weekacross1). Northernand eastern observed Ethiopia Kenya. 7-day receivedFloodingdeficits littlecontinues rain of upthis to to beweek 25 a concern mm.and Seasonal observed for many dryness 7 -areasday isdeficits that setting continue of upin toacrossto 25mm.see repeatedeastern Seasonal Kenya.weeks dryness Flooding of enhanced is continuessetting rains. in to across Thebe a concern.Shebelle eastern RiverKenya. in FloodingSomalia continues to runbe anear concern flood forstage. many areas that continue to see repeatedHowever, weeks western of andenhanced northern rains. provinces The Shebelle of Ethiopia River exhibit in SomaliaWestern continues and, increa to runsingly, near northern flood stage. provinces of Ethiopia exhibit seasonalseasonal rainfall rainfall deficits. deficits, Heavy rains despite 2 weeks recent ago heavy started rains. to shrink Thirty- day moisture deficits in several areas are between 25 - 50 mm Westernmoisture anddeficits, increa. Still,singly, 30-day northern moisture provinces deficits inof several Ethiopia area exhibits are seasonalbetween(Figure rainfall25 and 2) anddeficits. 50mm less thanHeavy(Figure 50% rains 2of) normal. and2 weeks less Concurrently, agothan started50% of vegetationto normal. shrink moistureConcurrhealthently deficits , hasvegetation. Still,degraded. 30 -hdayealth In moisture Yemen,has degraded deficitsthe season inrapidly several so as far areaevidenced is slightlys are betweenby thedrier vegetation 25 thanand normal50mm health in(index.Figure the east Meanwhile 2) andand wetter less in Yemen,than to the50% thewest. of season normal.However, so Concurrfar is slightlyvegetationently, vegetationdrier conditions than normalhealth are hasin average.the degraded east and rapidly wetter as to evidenced the west. byHowever the vegetation this appears health to index. have affectedMeanwhile vegetation in Yemen, conditions the season little. so far is slightlyNext week, drier heavythan normalrainfall inis expectedthe east andto continue wetter to overthe west.western HoweverFor the upcomingthis appears outlook to have period, affected models vegetation suggest conditions the continuation little. of heavyKenya, rainfall Rwanda, over westernBurundi, Kenya South, Sudan,Rwanda and and Western Burund iEthiopia., South Figure 1: NOAA/CPC ForSudan theAnother andupcoming Western tropical outlook Ethiopia cyclone, period,. Another Mekunu, models tropical is suggest strengthening cyclone the continuation, Mekunu, east of theis ofstrengthening heavyhorn. rainfall It eastis overexpected of western the htoorn. trackKenya It isnorthward, Rwandaexpected and towardsto trackBurund thenorthwardi, ArabianSouth Source: NOAA/CPC Sudantowards Peninsulaand the Western Arabian and makeEthiopiaPeninsula landfall. Another and somewhere make tropical landfall nearcyclone somewhere the, Oman-YemenMekunu, near is Figure 1: NOAA/CPCSatellite Estimated Rainfall Anomaly (mm) strengtheningthe Omanborder,-Yemen eastwhere border,of it the is likely wherehorn. to Itit bring is likelyexpected heavy to bring rains to track heavyand windsnorthward rains upand to Valid: April 23 – May 22, 2018 winds up to 75kts. towards75kts. the Arabian Peninsula and make landfall somewhere near Figure 2: ARCSatellite 30-day Estimated Total Rainfall Rainfall Anomaly Anomaly (mm) the Oman-Yemen border, where it is likely to bring heavy rains and Valid: April 23 - May 22,Valid: 2018 April 23 – May 22, 2018 winds up to 75kts. A suppressedRainfall was rainfall below-average pattern in Westquickly Africa returned last week to West AfricaRainfall during was the mainly last week. light across the region last week. Heavy A suppressedrainfall totals rainfall approaching pattern 100 quickly mm were returned only observedto West in AfricaRainfallparts during was of mainly southeastern the lastlight week.or moderateNigeria and across northern the regionBenin. duringThe rest the of past 7the days. region Heavy received rainfall around totals 25approaching mm or less 100mm during thewere period. only RainfallobservedMoisture was very mainly locally deficits light in partsorare moderate growing of southeastern rapidlyacross theandNigeria, regionnegative and during northern anomalies the pastBenin. 7 are days.Most greater ofHeavy the than rest rainfall 50of mmthe totals regionduring approaching received the 30-day around 100mm period 25mm (Figurewere or only less2). A observedduring the very period. locally The in partsextent of of southeastern rains pushed Nigeria, a little andfarther northern north throughpoor Sierra and delayedLeone and start Guinea to rains than is also previous now observed weeks, inbut Burkina total Benin. FasoMost and of the southern rest of Mali. the region Some improvementreceived around to seasonal 25mm or deficits less duringamounts the wereperiod. still The quite extent light of rainsand pushedsuppressed a little below farther normal. north throughMoisturehas Sierra deficitsbeen Leone observed are growingand in Guinea southern rapidly than Nigeria,and previous negative but weeks,many anomalies other but total areasare amountswell greateralong were thethan Gulfstill 50mm ofquite Guinea during light remainthe and 30 - dayabnormallysuppressed period ( dry.Figure below 2 ).normal. A poor Moistureand delayed deficits start are to growingrains is rapidlyalso now and be negativeing observed anomalies in Burkina are wellFaso greater andDuring southern than the 50mm next Mali. week,during VHI indicates thethe 30forecast-day that period poorcalls rainfall for(Figure rain performance 2in). theA