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December 2020 Monthly Bulletine.Pdf NATIONAL METEOROLOGICAL AGENCY METEOROLOGICLA DATA AND CLIMATOLOGY DIRECTORATE Some Applications of DATA ROCESSING AND CLIMATOLOGICALCASE TEAM Climate Information MONTHLY CLIMATE BULLETIN Disaster Management December 2020 HIGHLIGHTS During this time the monthly total rainfall values of December 2020 were as high as 72.8mm,72.8mm,62.3mm,58.2mm,52.6mm,48.6mm,42.9mm,42.6mm and 40.3mm over Aman, Masha, Aykel, Jimma, Lare, Sawla Teppi Maji and Robe respectively. Water Resources Management Besides, the daily rainfall values over exceeded 13mm, Ayikel, Jima, Lare, Masha, Aman, Maji, Bore and, and Gambela, were as high as 50mm, 43.6mm, 34.0 mm,30.6mm,26.8mm 26.0mm,22.7mm, and 19.54mm respectively (Tables 3.2.2; Fig 3.2.1). Construction In general, the monthly total rainfall amount of December 2020 was Normal to below normal over most parts of the country, while a portion of Afar, west part of Amhara and Gambela had above normal rainfall December 2020 was generally Environment & Health drier than December 2019 over most part of Ethiopia except pocket are of. Afar Oromia and Tigray. See (Fig. 3.2.3). Transport Sport & recreation Percent of normal rainfall of December 2020 Foreword This climate bulletin is prepared and disseminated by the National Meteorological Agency (NMA). It is aimed at providing climatological information to different services of the community involved in various socio-economic activities and giving some highlights about major synoptic situations. The information contained in the bulletin is believed to assist planners, decision-makers and the community at large by providing details of the climatic conditions of the nation in a given period. This bulletin differs from the other real time and near real time bulletins issued by the Agency, which for their input depend only on meteorological stations equipped with single side band radio for data transmission. Though this bulletin is not real time, published with a delay of some months, the information contained in this bulletin is based on data coming from a much larger number of meteorological stations. Moreover, the information contained in this bulletin is not sector-specific and a wide range of users can benefit from it. The Agency disseminates monthly, seasonal and annual climatological bulletins in which all- necessary climatological information and significant climatic anomalies are highlighted. We have a strong belief that various socio-economic activities related to planning disaster mitigation, water resources management, construction, environmental protection, transportation, recreation, tourism and others will be benefited most by the careful and continuous use of this bulletin. Meanwhile, your comments and constructive suggestions are highly appreciated to make the objectives of this bulletin a success. FeteneTeshome Director General National Meteorological Agency of Ethiopia P.O.Box 1090 Tel: - +251-11-558-56-00/+251-11-551-22-99 Fax: - +251-11-552-8713/+251-11-558-7910 E-mail: [email protected] Addis Ababa 3 The main land-surface temperature signals 1. Synoptic Situation included above-average temperatures across 1.1 Surface much of North America, western Europe and eastern Siberia, and below-average temperature The Mascarene high with a mean central pressure across the eastern Europe to northern China. The value of 1020hPa was centered at about 30°S- main precipitation signals included near- 40oS, 70oE-110 oE. The central pressure value average totals in much of North America and was above normal by up to 5hPa to 7hPa. Asia, and below-average totals in western The Saint Helena high with a mean central Europe. pressure value of 1020hPa was centered at about o o 0 o 22 S-38 S, 10 W-5 E. The central pressure value 1.4 Upper Troposphere (200hPa vector was above normal by 1-3 hPa during this month. wind) The Azores high with a mean central pressure The easterly wind, associated with the subtropical value of 1020 hPa was centered at about 5oE, easterly jet, had strength further with the core 300N -400N. The central pressure value was above speed of above 15m/s -20m/s along 15 0 N. normal by up to 1-3hPa. 2. Tropical Oceanic and Atmospheric 1.2 Lower Troposphere (850hPa vector Highlights wind) During December 2020, sea surface Cross-equator flow of above 4-8m/s was observed temperatures (SSTs) remained below-average over most of Indian Ocean and the adjoining areas across the central and eastern equatorial Pacific. of the Horn of Africa. The latest monthly Niño indices were -0.7°C for 1.3 Middle Troposphere (500-hPa the Niño 1+2 region, -1.0°C for the Niño 3.4 Geopotential Height) region and -0.8°C for the Niño 4 region. The depth of the oceanic thermocline (measured by The 500-hPa circulation during December the depth of the 20°C isotherm) was below- featured above-average heights over the average across much of the eastern equatorial northwestern U.S., the northwestern North Pacific. The corresponding sub-surface Atlantic and western Europe, and below- temperatures were 1-4°C below-average in the average heights across eastern Siberia, the eastern equatorial Pacific. Also, during middle and high latitudes of North Pacific and December, the lower-level easterly winds were the northeastern North Atlantic. above-average across the western and east- central equatorial Pacific c and the upper-level 4 westerly winds were above-average over much Table 3.1.1 Stations with extreme maximum o of the eastern equatorial Pacific. Meanwhile, temperature values of greater than 36 C during December 2020 tropical convection continued to be suppressed over the western and central equatorial Pacific. Extreme Max. Station temperature in 0C Date Collectively, these oceanic and atmospheric SHERKOLE 39.3 16 anomalies were consistent with La Niña METEMA 39.2 8 conditions. ABOBO 39.2 28 FUGNUIDO 39 15 Reference: Climate Diagnostics Bulletin December Arba Minch 39 30 2020 (www.cpc.ncep.noaa.gov). Gode 38.6 30 3. Weather Kibridahar 38 15 LARE 38 25 3.1Temperature MANKUSH 37.8 24 During December 2020, days were remained hot ELIDAR 37.6 5 over Easter Somali Gambela Humera and Jinka 37.5 31 GAMBELLA 37.4 26 Metema. In particular, the extreme maximum DUBTI 37 7 o temperature values were as high 39.3 c as SIRBA ABAYA 36.7 31 39.2oc, 39.2oc, 39.0oc, 39.0oc, and 38.6 oc over Table 3.1.2 Stations with extreme minimum temperature values of less than or equal to Sherekole, Metemar, Abobo, Fugnuido 3.0oC during December 2020 Arbamich and Gode. respectively (fig 3.1.1). Extreme On the other hand, in the highlands of Amhara Station min. tem0C Date and Oromia some places experienced cold DEBREZEIT(AF) -4.2 16 nights and early mornings during the month. D/BREHAN -3.9 17 Bati -3.6 16 Particularly, days with minimum temperature WEGELTENA -2.6 17 0 values of less than or equal to 2.0 c were ALEMAYA -2 27 reported over Debrezeit (AF), Debrebrhan Bati, MEHALMEDA -1 15 Wegeltena Alemaya, Mehalmeda, Jijiga, Cheffa JIJIGA -1 15 CHEFA 2 28 and, Arsi robe with minimum temperature ARISE ROBE 2 28 0 0 0 0 0 values of -4.2 c, -3.9 c, -3.6 c, -2.6, c, -2.0 c, - YABELO 2.2 19 10c, -1.0c,2.00c, and 2.00c (See table 3.1.2). Indiber 2.4 28 Enewari 2.5 18 Bui 2.6 17 AMBAMARIAM 3 4 ADELLE 3 17 Robe 3 18 5 3.2 Rainfall Robe 17.8 20 DOLOMENA 16.5 30 Abomsa During this time the monthly total rainfall values 14.7 20 TEPI 14.6 19 of December 2020 were as high as MOYALE 14.0 31 77.8mm,72.8mm,62.3mm,58.2mm,52.6mm, Jinka 13.9 31 48.6 mm,42.9mm, and 42.6mm over Aman, HAGEREMARIAM 13.7 7 Masha, Aykel, Jimma, Lare, Sawla Tepii and Table 3.2.2. Station(s) with over 26 mm of Arjo respectively. monthly total rainfall during December 2020 Besides, the daily rainfall values over exceeded Station Total amount of 13mm, Ayikel, Jima, Lare, Masha, Aman, Maji, rainfall in (mm) Bore and Gambela, were as high as 50mm, AMAN 77.8 MASHA 72.8 43.6mm,34.0mm,30.6mm,26.8mm,26.0mm, AYKEL 62.3 22.7mm, and 19.5mm respectively (Tables JIMMA 58.2 3.2.2; Fig 3.2.1). LARE 52.6 In general, the monthly total rainfall amount of SAWULA 48.6 TEPI 42.9 December 2020 was Normal to below normal AJJI 42.6 over most parts of the country, while a portion Robe 40.3 of Afar, west part of Amhara and Gambela had GAMBELLA 36.1 above normal rainfall December 2020 was BORE 36.0 Jinka 29.1 generally drier than December 2019 over most DOLOMENA 27.0 part of Ethiopia except pocket are of. Afar SHAMBU 26.7 Oromia Tigray. See (Fig. 3.2.3). Table 3.2.1. Station(s) with greater than 13mm of rainfall in 24 hours during December 2020 Station Extreme Date AYKEL 50.0 26 JIMMA 43.6 1 LARE 34.0 10 MASHA 30.6 7 AMAN 26.8 31 MAJJI 26.0 31 BORE 22.7 30 GAMBELLA 19.5 5 SAWULA 19.4 31 6 Table 3.2.3 new record(s) of maximum daily rainfall in mm during December 2020 Stations Old record New record Rainfall Date Rainfall Date in mm in mm Aykel 15.0 19/1970 50 26 Fig. 3.1.2. Monthly minimum temperature in oC during December 2020 Fig. 3.1.1.
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