METEOROLOGICALSERVICES MONTHLYBULLETIN OF CLIMATOLOGICALSUMMARIES JANUARY 2015 MAY 2015 REPUBLI COFMAURI TI US Contents Introduction 1-2 Map of Mauritius and Area of Responsibility 3 Weather Summary 4 Rainfall in Mauritius5-10 Mean Monthly Rainfall11 Rainfall Analysis 12 Monthly Climatological Summaries13 Monthly Agro-meteorological Summaries14 Monthly Synoptic Summaries15 Mean Sea Surface Temperature 16 Surface Wind Rose 17 Upper Wind Observations18 MONTHLY CLIMATOLOGICAL SUMMARIES FOR MAURITIUS, RODRIGUES AND OUTER ISLANDS 1.INTRODUCTION MauritiusliesbetweenLatitudes1958.8'and2031.7'SouthandLongitudes5718.0'and5746.5'East.Rodrigues lies between Latitudes 1940' and 1946' South and Longitudes 6320' and 6330' East about 650 kmEastofMauritius.St.BrandonisacoralatollsituatedaroundLatitude1627'SouthandLongitude 5937'Eastabout450kmtotheNorth-North-EastofMauritius.Agalegaconsistsoftwosmallislands betweenLatitudes1020'and1029'SouthandLongitudes5634'and5642'East,about1050kmalmost North of Mauritius. Monthlyclimatologicaldatapresentedinthisissuearebasedondailyobservationsofvarious meteorological parameters recorded in Mauritius, Rodrigues, St. Brandon and Agalega. 2.STATIONS Synoptic Weather Stations Synopticweatherstationsperformsynopticweatherobservations;thatis,surfaceweatherobservationsat fixed intervals of time of sky cover, cloud base height, atmospheric pressure, temperature, dew point, wind speed and direction, precipitation amount, horizontal visibility and other special phenomena. The Mauritius Meteorological Services maintains six synoptic stations: Vacoas(2018'S,5730'E)WMOStationnumber61995,andPlaisance(2026'S,5741'E)WMOStation number61990,inMauritius.PointeCanon(1941'S,6325'E)WMOStationnumber61988andPlaine Corail (1941'S, 6345'E) WMO Station number 61989, in Rodrigues. Raphael Island, located at 1627'S and 5937EWMOStationnumber61986,inStBrandon.Agalegalocatedat1021'S5635'E,WMOStation number 61974, in North Island. Climatological Stations Climatological stations record such parameters as: maximum and minimum temperatures, rainfall and some otherelementslikeatmosphericpressure,humidity,soiltemperatures,sunshineandwind.TheMauritius Meteorological Services has a network of 26 climatological stations in Mauritius. Agrometeorological Stations Theagrometeorologicalstationsmonitorstandardclimatologicaldatathatareofinteresttoagriculture, livestockbreedingandforestry.Thesestationsmonitorthefollowingparameters,evaporation,humidity, rainfall, sunshine duration, temperature and wind. TheMauritiusSugarIndustryResearchInstitutemanagesfoursuchstationsinMauritiuswiththe collaborationoftheMeteorologicalServices.SavannahSugarEstatemaintainsanotherstationatLa Baraque. 3. INSTRUMENTS IN USE AT METEOROLOGICAL STATIONS: Raingauges Ordinaryraingaugeswithouterrimofdiameter11.28cmtogetherwithordinarylaboratorycylinders graduatedincubiccentimetersarebeingusedtomeasurerainfallatmoststations.Readingsaretakenat 0700 hours daily.Fourteen stations are equipped with rain recorders, which provide rainfall intensities. 1 Thermometers and Hygrometers Ordinarymercuryinglassthermometersareusedtomeasuredry,wetbulbandsoiltemperatures.MaximumandMinimumtemperaturesaremeasuredbyotherappropriatethermometers.Thermohygrographs have been installed at four stations. Anemometers EightDinesanemometersprovidewinddataatthefollowingsitesinMauritius:DigueSeche,FUEL, Medine, Mon Desert Alma, Pamplemousses, Plaisance, Quatre Bornes and Vacoas. There is also one Dines anemometer at Pointe Canon in Rodrigues. At Agalega, St. Brandon and Plaine Corail airport in Rodrigues, wind is measured by a cup anemometer. Sunshine Recorders Campbell Stokes sunshine recorders have been installed at twenty-one sites in Mauritius. One station at Rodrigues and one at Agalega are also in operations. Evaporation Pans Modified US Class A pans are used to measure daily evaporation amount at 14 stations in Mauritius and one station, Pointe Canon, in Rodrigues. Barometers Mercury barometers, digital barometers and aneroid barographs are used at all synoptic stations to measure atmospheric pressure. Tide Gauges Sea level is monitored using tide gauges installed at Port Louis and Port Mathurin. In January 2009, a new tide gauge was installed in Agalega and another one at Blue Bay. Upper Air monitoring Equipment Presently Upper Air observations are carried out twice a week at Vacoas.A GPS system using the SR10 Upper Sounding (receiver) software ICAR-IR 2010 is used to compute upper level winds. Automatic Weather Stations 22automaticweatherstationshavebeeninstalledatdifferentsitesovertheisland.Weatherparameters observed by these automatic weather stations are: humidity, rainfall, temperature, wind and pressure. Three stations,namelyVacoas,BainBoeufandSt.Felixalsorecordglobalsolarradiation.Therearealsotwo stationsinRodrigueswhichmeasurefiveparameters.AdditionallythestationatCitronellealsomeasures the global solar radiation. 4.METEOROLOGICAL SUMMARIES Monthly summaries of meteorological observations in the form of mean totals, extreme values with date of occurrence and departure from long term mean are presented in this issue for various climate parameters of stations located in Mauritius, Rodrigues and the Outer Islands. 255 E 90 E 85 E15 S10 S45 E 50 E25 S20 S05 S60 E 65 E 70 E 75 E 80 EMauritius ReunionRodriguesSt. BrandonTromelinTanaTamataveFort DauphinEuropaJ. de NovaDiego SuarezDiego GarciaAgalegaSeychellesArea of Responsibility of the Republic of Mauritius for theNaming ofTropical CyclonesNNNWEEWWCWCLSESSSW:::::::::NorthNorth WestEastWestCentral Plateau (Windward)Central Plateau (Leeward)South EastSouthSouth WestContours:Height (metres)Regional DelimitationsScale 1:300,000NMap of Mauritius showing Contours and Basin320MonChoisyDigueSechePamplemoussesFort WilliamFUELMedineReduitAlmaSansSouciBeauChampVacoasFerneyPlaisanceBritanniaBel OmbreLe Morne40160NNNW404016016032032044044060040160EESESSSWWWCLCW3WEATHER SUMMARY - JANUARY 2015 January 2015 was warm, moist and unstable with vigorous convection occurring in the equatorial region.Fournamedtropicalstormswereobservedduringthismonth,namely:BANSI, CHEDZA, DIAMONDRA and EUNICE. The axis of the subtropical high pressure systems was centred between 35 and 40 degrees South latitudes.CrossequatorialflowwasmoderateandpersistentduringthemonthandtheInter-Tropical ConvergenceZone (ITCZ) was locatedbetween 12 and 15 degrees South. Sea surface temperaturewaspositiveovertheSWIOTropicalCycloneBasinandverticalwindshearwas weak. All environmental conditions were favourable for the development for tropical storms. ThemonthofJanuarywasveryactivewithfournamedtropicalstormsevolvinginthe SouthwestIndian Ocean. Thefirst storm/cycloneof theyear was namedBANSI on 11 January 2015. BANSI intensified into a very intense tropical cyclone (VITC) while moving in a general easterly direction. The system impacted SaintBrandon directlywheregusts of the order of 167 km/hwasrecorded.TheassociatedstormsurgesubmergedRaphaelIslandwherethe MeteorologicalStationislocated.VITCBANSIcausedcyclonicconditionstoprevailat Rodrigueson16Januarywhenitpassedatabout100kmtothenorth-north-eastoftheIsland. HighestgustrecordedatCitronellewas133km/h.CloudsbandsassociatedwithBANSIgave heavy precipitation and strong winds at Mauritius. Moderate tropical storm CHEDZA, named on 15 January evolved in the Mozambique Channel. ThesystemcrossedMadagascarfromWesttoEast.Asitemergedintothewarmwatersofthe IndianOcean,itre-intensifiedintoaseveretropicalstormwhilemovingsouthward. DIAMONDRAwasnamedon11JanuaryandEUNICEon27Januaryrespectively.Thesetwo systemsevolvedawayfromtheMascareneIslands,anddidnotdirectlyinfluenceweatherover the Islands of the Republic of Mauritius. RainfalloverMauritius,RodriguesandSaintBrandonwasabovethemeanwith150%,203% and252%ofthenormalrespectively.HighmoistureandthepassageofVITCBANSI contributedsignificantlytotheabovenormalrainfallovertheislands.Agalegarecordednear normal rainfall amount. January 2015 was hot and sultry. Maximum temperature was slightly above the mean by one to twodegreesCelsiusinMauritiusandtheOuterIslands.Thehighmoisturecontentandabove normal temperatures resulted in very uncomfortable atmospheric conditions.Mean sea level pressure was below the seasonal mean at all stations by 2 hPa during the month. The lowest mean sea level pressure for the month was recorded at Saint Brandon with 988.5 hPa on 14th during the passage of VITC BANSI in the vicinity of Raphael Island.4RAINFALL IN MAURITIUS---JANUARY 2015 REGI ON:NORTH CapMalheureux 594374 3 408.0 260.0 16 14 10 6 2 108.0 12 MontChoisy 012333 9 282.7 129.7 15 14 10 3 2 56.4 10 Mapou Cour 016382 40 - - - - - - - - - St. Antoine (Cour Usine) 024391 30 265.0 116.3 17 10 9 5 0 47.4 23 Bain Boeuf (A.W.S) 510360 7 253.6 - 17 11 8 6 0 46.6 23 Digue Seche 036396 30 205.8 42.5 17 10 7 3 0 36.4 22 Solitude (La Plaine) 048322 30 262.0 111.4 18 13 11 4 1 57.0 10 Mon Loisir Rouillard (A.W.S) 020370 55 263.8 - 17 10 8 5 0 37.4 23 Mon Loisir Rouillard 019371 49 273.0 94.3 18 13 8 6 0 48.0 23 FondduSac 026345 40 310.6 159.5 15 15 11 3 2 62.0 10 Mapou (B.V.M) 028360 64 272.0 94.8 17 12 9 4 1 57.0 23 Fleurant 029387 46 - - - - - - - - - Forbach (B.V.M) 035375 58 248.0 66.3 18 13 9 3 0 42.0 22 Belle Vue (B.V.M) 039356 104 259.0 64.5 18 11 10 3 0 48.0 10 Labourdonnais 040365 73 267.3 81.3 18 13 10 3 0 36.6 10 NPIPP 036342 - 214.0 26.3 15 10 7 3 0 37.6 09 Mauricia (B.V.M) 046353 91 299.0 120.0 19 14 10 7 0 45.0 10 Schoenfield 046396 40 239.6 89.6 17 12 8 3 1 63.2 22 St. Andre (AG22) 050328 44 238.0 69.9 17 13 10 4 1 53.0 10 MonChoix 056366 122 278.6 103.7 19 16 10 3 0 45.0 10 Beau Plan 057340 65 242.0 56.7 18 15 10 4 0 29.0 10 BeauSejour 057379 114 185.3 2.0 18 12 9 1 0 28.7 23 ChampRose 059327 41 233.0 66.2 18 15 9 4 0 32.0 09 Pamplemousses (M.S.I.R.I) 061346 79 258.3 70.5 18 12 10 4 0 37.0 10 Maison Blanche 064351 96 278.9 68.8 19 13 10 4 0 40.6 10 MonLoisirS.E. 066404 64 281.7 106.9 18 14 10 3 1 50.8 22 TheMount 067357 119 277.1 51.2 19 15 9 4 0 46.0 10 Esperance (Beau Plan) 070347 88 321.0 125.9 19 18 12 4 1 52.0 10 Belle Vue Maurel 074400 97 377.5 190.6 20 16 13 3 2 72.5 22 Mon Piton 063370 177 416.2 206.9 19 17 16 5 2 56.0 10 Antoinette 074381 171 318.2 50.7 22 17 12 5 1 54.0 23 Grande Rosalie 079362 198 407.3 174.9 23 19 16 5 0 49.5 23 Mon Songe 081381 186 396.1 141.0 23 19 13 5 2 71.1 23 California 091369 262 479.0 188.8 22 20 17 7 2 66.0 23 Industrie(Cour) 100355 180 263.0 26.0 20 0 10 1 0 47.0 23 REGI ON :NORTH WEST Cantin 073303 24 - - - - - - - - - Richeterre (Versailles) 076310 30 - - - - - - - - - Cite La Cure088313 40 297.3 - 18 15 10 4 0 42.4 09 FortWilliam(P.L.H.R) 091287 6 242.5 106.5 15 12 9 3 0 42.0 13 *Often - Data not available5mmDate10 mm25 mm50 mmin 24 hr mmSTATIONS LocationA.W.S : Automatic Weather StationMaximum Rainfall1mmAlt m TotalmmDep from NormalNo of days on which RR reached or exceeded5 RAINFALL IN MAURITIUS---JANUARY 20151 5 10 25 50mm mm mm mm mm REGI ON : NORTH WEST Port Louis (A.W.S) 100300 5 246.0 - 17 11 10 3 0 36.8 09 Le Souvenir 069336 70 187.0 18.3 19 11 7 2 0 43.0 01 Amitie(2) 081324 88 367.0 192.1 20 16 12 5 1 59.0 10 NotreDame 085334 131 363.0 156.5 20 16 12 5 2 55.0 10 Domaine Les Pailles(A.W.S) 117293 90 308.0 - 18 11 8 6 0 48.4 19 Valton 092335 146 278.0 89.5 20 16 12 5 1 50.0 23 La Butte 098290 41 350.0 - 16 13 11 4 3 88.0 10 BeauFonds 091349 236 349.0 141.3 20 16 12 5 1 57.0 01 REGI ON:WEST Albion (Medine) 127240 12 235.2 96.6 15 13 10 3 0 37.7 19 Albion (A.W.S) 120240 5 238.0 - 17 10 8 3 1 59.4 23 Balisage 138232 40 247.4 104.5 15 12 10 5 0 49.5 23 Petite Riviere Noire 232223 3 269.0 128.3 11 11 9 3 2 66.0 23 Case Noyale 242220 15 357.6 180.2 19 14 12 4 2 79.0 23 Richelieu 113272 67 339.0 195.7 12 10 10 7 2 80.0 11 Gros Cailloux 124254 82 - - - - - - - - - St Antoine (Medine) 134249 116 251.3 113.1 14 13 11 3 0 36.0 23 La Mecque 149234 85 255.1 100.0 15 12 9 3 0 44.2 23 La Ferme 152248 140 301.5 137.3 18 13 11 5 0 48.2 22 Belle Vue (Medine) 153228 61 189.5 59.4 14 10 5 3 0 41.5 22 Medine (Medine) 155233 91 288.5 129.7 17 14 9 4 0 46.0 23 Palmyre (No.1) 168233 91 243.2 93.1 12 11 8 3 1 67.3 22 Clarens (Medine) 178236 67 373.5 201.2 15 13 10 6 1 103.4 22 La Verette 190247 72 227.3 59.4 17 13 8 3 0 41.6 02 Magenta 191260 88 357.0 160.9 16 14 12 5 2 75.0 22 Tamarin( Estate ) 193238 43 281.6 102.8 17 12 11 4 0 45.0 20 Yemen 202242 67 236.7 48.4 17 13 7 2 1 57.2 23 Beaux Songes (A.W.S) 160250 225 305.2 - 19 12 10 6 1 52.0 22 Chebel 125270 162 271.4 98.4 16 14 10 3 0 45.0 23 Bagatelle (Medine) 131292 302 - - - - - - - - - Le Bosquet 133263 183 269.6 116.6 17 15 12 2 0 42.0 23 Barkly(Exp.Station) 133272 207 - - - - - - - - - LeReduit (M.S.I.R.I) 139293 311 392.3 135.1 19 15 14 5 2 53.6 14 La Chaumiere (R.B. No1) 140259 174 359.2 184.6 17 16 12 5 2 51.0 23 Trianon (Estate) 150291 305 458.6 - 19 15 14 7 2 60.1 19 Corps de Garde 162264 281 252.0 19.7 16 13 11 2 1 50.2 22 BeauxSonges (Medine) 160250 225 298.9 107.7 16 13 12 4 1 50.4 22 Pierrefonds 171261 278 297.0 65.3 16 13 10 3 1 95.0 22 Bassin 177268 314 345.7 104.3 20 15 13 2 1 80.2 22 REGI ON : SOUTH WEST LaGaulette 250215 10 - - - - - - - - - Le Morne (A.W.S) 260190 2 196.2 - 17 10 4 2 1 60.2 22 LeMorne Brabant 273184 3 - - - - - - - - - Coteau Gambier 265190 55 - - - - - - - - - *Often - Data not availableSTATIONS LocationAlt m A.W.S : Automatic Weather StationTotal mmDepfromNormalNo of days on which RRreached or exceededMaximumRainfallin 24 hrmmDate6RAINFALL IN MAURITIUS ---JANUARY 20151 5 10 25 50 in 24 hrmm mm mm mm mm mm REGI ON : SOUTH WEST Terres Couleurs 262220 259 354.0 138.9 19 16 11 3 2 100.0 23 Chamarel( Estate ) 262230 267 283.0 67.4 20 15 11 2 2 75.0 23 PlaineChampagne 254258 701 563.9 243.9 21 19 15 7 2 158.0 23 REGI ON : SOUTH Beau Champs (B.O) 299260 21 251.5 30.8 17 9 6 2 2 69.2 22 BelOmbre 301244 8 541.8 368.0 20 13 10 8 3 110.0 10 St Felix(Factory) 301277 24 - - - - - - - - - Terracine 306308 30 423.0 211.9 20 11 9 4 1 200.0 22 Souillac (A.W.S) 310320 28 - - - - - - - - - Choisy Estate 288223 70 346.9 145.8 24 16 9 4 1 76.6 22 Frederica 290250 125 410.5 210.2 17 13 11 4 2 90.5 23 Canal Vacoas 294241 46 349.2 178.9 16 13 9 5 2 92.3 22 Ste. Marie 295273 53 314.1 83.7 18 16 9 4 1 82.5 23 Fontenelle 297315 94 412.0 175.9 20 11 9 4 1 200.0 22 St. Aubin 300322 86 151.5 -104.9 21 10 7 0 0 19.0 22 Riviere des Anguilles 301330 82 - - - - - - - - - Bel Air (Benares) 302339 49 304.0 84.6 15 10 10 2 1 127.0 22 UnionSavanne 304322 64 407.0 171.0 20 11 9 3 1 200.0 22 Val Riche 274261 305 504.9 199.7 19 16 15 6 2 115.8 23 Luchon 275273 236 - - - - - - - - - Satana 289260 168 - - - - - - - - - Combo 287319 175 463.0 146.7 19 15 9 4 2 200.0 22 Bois Sec (U) 265306 439 - - - - - - - - - BoisCheri 254312 475 664.3 234.1 28 21 17 7 2 150.2 23 Pradier 249297 600 690.7 - 23 18 16 10 2 178.0 23 Grand Bassin (A.W.S) 240295 605 681.2 - 27 19 17 9 2 142.0 23 REGI ON : SOUTH EAST PointeauxFeuilles 183463 15 468.5 254.8 22 17 13 8 2 79.0 18 Bestel 204403 15 870.1 502.2 25 21 17 11 4 213.6 22 Camizzard 208417 21 662.1 274.1 24 17 14 10 5 146.0 22 Providence (F) 215439 24 670.4 415.5 22 18 14 10 5 92.5 18 Ferney 216420 6 442.2 135.6 23 14 12 5 2 98.6 22 Le Vallon 220410 3 577.1 281.4 24 19 15 8 2 140.4 22 Campement 203413 20 231.8 - 21 10 8 3 0 43.5 22 Ste Helene 251405 40 345.8 126.5 22 15 10 6 2 57.5 23 BeauVallon (Cour) 252416 21 401.8 196.6 23 13 10 5 3 73.8 22 Terre Rocheuse (B.V West) 257413 27 385.8 191.7 22 11 9 5 4 71.0 22 Terre Rocheuse (R.L Chaux) 260424 9 413.3 225.8 21 12 10 6 4 87.0 22 MonDesert( M.D.M.T) 271403 23 365.3 153.8 19 13 9 6 2 81.0 22 Riviere Tabac 293378 31 271.3 83.6 17 10 6 4 2 102.4 22 Florine 211390 145 568.4 227.2 25 18 13 6 3 134.0 22 *Often - Data not available A.W.S : Automatic Weather StationMaximum RainfallDateSTATIONS LocationAltmTotal mmDep. from NormalNo of days on which RR reached or exceeded7 RAINFALL IN MAURITIUS---JANUARY 2015 1 5 10 25 50 in 24 hrmm mm mm mm mm mm REGI ON : SOUTH EAST Cent Gaulettes 214384 145 539.2 198.9 26 17 14 6 3 104.0 22 Riviere des Creoles 220389 134 502.5 194.7 27 18 12 7 3 97.0 23 RicheEnEau 231394 110 410.7 141.3 26 15 11 4 3 67.4 23 RicheEnEau (A.W.S) - - 371.6 - 25 15 10 5 2 61.0 22 Astroea (R.E.E) 233379 163 499.8 181.7 25 14 12 6 3 94.0 22 Courbevoie 243400 69 348.4 106.9 22 16 9 5 2 63.0 21 MonTresor 254392 73 415.2 161.2 20 15 10 6 3 66.5 22 Plaisance 261410 50 326.6 105.2 20 11 9 7 1 52.7 22 GrosBois 264365 160 376.0 99.1 20 16 9 6 2 85.0 22 Union Vale 267389 58 346.2 113.6 17 14 9 3 2 97.0 22 Sauveterre 276390 49 331.2 105.8 18 12 8 4 2 110.0 22 LaBaraque 280371 76 338.1 96.7 20 11 8 4 1 115.0 22 Colmar Siding Benares 284334 168 396.4 149.4 20 11 8 7 1 128.0 22 Savinia 285380 49 305.9 86.0 18 10 7 4 1 111.6 22 Chateau Benares 288349 107 342.0 101.1 20 11 8 5 1 100.0 22 Savanah 291365 58 347.3 123.6 18 10 9 5 1 117.0 22 St. Felix (B.A.S.E) 293339 122 432.0 193.9 17 11 10 5 1 177.0 22 Benares 296349 76 356.7 150.2 20 12 8 4 1 104.0 22 Montagne Ronde 201387 216 667.1 272.8 27 19 15 8 2 175.0 23 Eau Bleu Tostee 227363 213 - Mont Vernon 232369 287 543.9 194.5 24 19 13 5 4 124.0 22Deux Bras239278 158 - - - - - - - - - Hewetson 261341 255 530.5 200.0 23 17 14 8 2 120.0 22 St. Avold 262331 293 - - - - - - - - - Joli Bois 264349 216 429.5 128.3 20 15 8 4 2 116.4 22 Britannia 271334 229 442.4 142.8 22 13 9 5 2 132.6 22 Riche Bois (B) 274346 191 354.9 83.4 18 12 8 5 2 95.6 22 REGI ON : EAST HauteRive 067429 18 319.7 170.0 17 14 11 5 1 56.7 22 BrasD'Eau 082443 9 211.0 82.3 18 16 10 1 0 26.0 22 Providence (P.de Flacq) 100441 6 251.8 79.1 22 11 8 4 0 39.4 22 BassinRequins 102452 8 368.4 191.5 21 13 8 6 3 90.3 23 Constance 107424 40 351.7 161.6 24 14 11 4 2 58.6 21 Belle Mare 116461 3 261.0 96.7 20 13 7 4 0 46.0 18 MareLaChaux 117451 20 353.0 183.2 23 14 11 5 0 49.0 21 Palmar (A.W.S) 138480 5 274.2 - 19 12 10 3 1 53.4 21 Beau Rivage 153472 3 198.2 9.2 11 11 8 3 0 35.4 23 BeauChamp - Littoral 164465 15 335.7 136.3 23 14 10 4 1 59.2 23 Grande Retraite (La Retraite) 097404 113 383.7 159.1 24 14 10 4 2 103.2 22 Allendy (B.V) 116414 109 361.0 121.9 23 17 12 4 1 75.0 22 Argy 116439 43 350.5 146.6 24 14 12 6 0 42.0 10 *Often - Data not available A.W.S : Automatic Weather StationMaximum RainfallDateSTATIONS LocationAlt mTotal mmDep. from NormalNo of days on which RR reached or exceeded8RAINFALLINMAURITIUS---JANUARY 20151 5 10 25 50mm mm mm mm mm REGI ON : EAST FUEL( UNION ) 127410 146 430.2 174.6 22 14 13 5 2 96.5 22 La Gaiete 128435 64 368.6 155.7 22 17 12 5 2 53.5 22 Queen Victoria 132424 125 398.0 132.5 21 16 14 7 1 67.3 22 Queen Victoria (A.W.S) 130420 112 394.6 - 23 14 13 5 1 65.8 22 Belle Etoile 137453 71 300.0 123.8 22 13 8 5 1 77.5 21 Naye 139440 85 344.2 93.7 21 16 11 3 2 65.8 18 Caroline 148450 64 292.5 68.0 21 15 10 2 1 65.8 18 Clemencia 153421 119 459.4 167.9 21 14 13 6 2 99.6 22 Belle Rose (DRBC) 153434 82 338.4 119.4 23 13 10 4 1 70.7 22 La Lucie 154441 73 297.3 87.3 22 13 10 3 1 60.3 22 Terre Franche (D.R.B.C) 166438 79 360.2 122.8 23 15 13 5 1 54.0 18 Grand Port (D.R.B.C) 167458 64 318.5 121.7 25 17 11 4 0 44.2 18 Trois Ilots 171449 91 397.0 179.7 24 18 14 6 1 63.0 18 La Louise (T. Rocheuse) 174421 156 507.4 237.2 22 18 12 8 3 99.0 22 Olivia 178441 101 513.2 255.5 23 19 14 8 2 77.4 18 Beau Vallon (D.R.B.C) 178449 110 468.0 212.9 23 18 12 10 1 68.0 18 Etoile 183442 116 464.0 167.5 23 19 12 7 2 95.0 22 Belle Rive (D.R.B.C) 186431 116 419.3 136.1 22 16 11 6 2 70.2 22 Rich Fund 125399 189 414.8 147.1 18 14 11 6 2 100.0 22 Unite 138401 226 485.2 172.5 20 13 12 7 3 150.0 22 Gibraltar 138412 165 462.1 165.8 20 17 13 6 2 97.4 22 Bel Etang 145391 265 646.0 278.9 27 21 17 10 2 166.4 22 Sans Souci 178392 277 995.0 582.2 27 23 22 14 7 156.2 22REGI ON : CENTRAL PLATEAU WI NDWARD Bonne Veine (M.D.A) 143353 433 471.9 88.6 21 17 16 7 2 74.9 18 Providence 146371 369 779.4 401.6 27 22 16 12 5 121.8 22 Providence (A.W.S) 148367 378 716.6 - 25 19 16 11 2 127.6 22 Grosse Roche 172375 335 872.6 479.3 27 23 19 13 5 182.0 22 PitonduMilieu 175346 442 689.8 321.9 27 21 18 10 4 95.0 22 Eau Bleue Dam 211357 347 747.5 344.3 24 19 15 8 3 210.0 23 UnionPark (M.S.I.R.I) 230344 357 714.0 309.9 24 21 14 8 2 205.5 22 Nouvelle Decouverte(A.W.S) 110350 480 488.6 - 24 18 14 9 2 61.6 23 Belle Rive (1E) 170335 476 789.9 379.5 28 18 17 10 6 155.5 22 BelleRive( 2E ) 174335 467 752.0 338.2 27 19 17 10 5 115.9 22 XVIMile(Mon Bois)(A.W.S) 200320 590 628.8 - 25 18 14 8 5 153.8 23628.8 25 18 14 8 5 153.8 23 *Often - Data not availableSTATIONS LocationAlt m A.W.S : Automatic Weather StationTotalmmDepfrom NormalNo of days on which RR reached or exceededMaximum Rainfallin 24 hr mmDate9RAINFALLINMAURITIUS---JANUARY 20151 5 10 25 50mm mm mm mm mm REGI ON:CENTRAL PLATEAULEEWARD Beau Bois (M.D.A) 124335 436 671.8 331.9 23 19 17 12 3 106.7 21 Mon Desert Alma 133316 367 513.1 199.1 19 17 15 6 3 99.1 13 Minissy (M.D.A) 135302 354 436.4 158.6 18 17 15 6 2 68.1 13 Minissy (H) 143306 366 346.5 70.8 20 17 15 5 0 36.4 22 Moka (A.W.S) 130300 344 287.2 - 18 15 11 4 0 48.6 14 Coted'Or 147315 412 - - - - - - - - - Bagatelle (H) 151308 393 465.5 179.0 21 19 15 6 2 65.2 14 Quatre Bornes (Michaud) 159280 353 403.8 160.2 22 17 13 6 2 62.3 22 Highlands 164305 421 662.7 348.7 22 18 14 10 5 87.3 22 Vacoas 176294 424 544.2 245.5 20 18 15 9 2 108.9 22 Burgos 182258 396 348.4 109.8 22 15 13 3 1 80.8 22 Reunion 184293 433 - - - - - - - - - Holyrood 186275 396 375.9 132.6 21 17 14 4 1 80.4 22 Moon 192276 430 432.1 174.2 19 17 13 7 2 75.5 23 Alma 144340 451 530.1 164.5 21 18 14 9 2 97.3 21 Valetta 152334 448 636.5 263.0 21 18 14 9 2 134.1 21 Hermitage 161318 454 - - - - - - - - - Belle Rive (M.S.I.R.I) 168326 488 679.3 274.2 22 18 17 11 4 111.0 22 Henrietta 199281 469 519.4 231.2 20 17 15 8 3 82.4 23 Trou aux Cerfs (A.W.S) 178310 614 - - - - - - - - - La Marie 201290 353 - - - - - - - - - Tamarin( Res. ) 211275 485 - - - - - - - - - Bonne Fin 214283 536 557.0 213.2 21 17 16 8 3 87.3 23 Good End 216294 564 673.7 297.3 25 19 17 7 3 152.4 23 Mare Longue 225275 579 588.1 268.3 23 19 13 9 2 134.0 23 Arnaud 228295 576 757.3 335.8 26 20 16 11 4 184.0 23 Arnaud (A.W.S) 170290 580 705.4 - 25 20 16 10 4 153.8 23 Petrin 243275 655 668.7 291.1 23 19 17 8 4 147.8 23 REGI ON : RODRI GUES Pointe Canon 407255 58 304.5 155.6 18 9 6 4 1 121.4 15 Citronelle (A.W.S) 454216 33 440.0 - 18 13 9 6 3 144.8 15 Corail Airport 418265 335 332.9 199.6 15 7 7 4 1 142.5 15 REGI ON:AGALEGA I SLANDS Agalega 10 21' S 3 297.6 23.3 18 9 8 4 1 71.4 2156 35' E REGI ON :ST. BRANDONI SLANDS St. Brandon16 27' S 4 189.6 32.0 11 5 3 2 2 70.5 0959 37' E *Often - Data not availableSTATIONS LocationAlt mA.W.S : Automatic Weather StationTotalmmDep from NormalNo of days on which RR reached or exceededMaximum Rainfallin 24 hr mmDate10 MEAN MONTHLY RAINFALL JANUARY 2015 REGION NORTH SOUTH SOUTH HEIGHT WEST Windward Leeward EAST WEST 0 -- 40 272 143 285 130 412 295 32240 -- 160 261 241 390 181 439 443 373 329160 -- 320 399 287 643 303 438 544 443 276320 -- 440 366 317 685 239 703 480 825 493 250440 -- 600 450 388 207 693 589 579 243600 -- 680350 150 597 607 614 250 >680 650 650TotalMean 283 238 450 208 543 544 470 441 287MeanRainfalloverMauritius : 401.6mmPercentageRainfallofLongTermMean : 150% I sohyetal Analysis ( mm )NORTH EAST WEST SOUTHCENTRAL PLATEAUJanuary 2015 has been a very wet month with 401.6 mm of rainfall which represented 150% of the long-term mean of 1981-2010.Most of the rainfall recorded during the month was connected with two main episodes during the second and third week, namely:a) the passage of the very intense tropical cyclone BANSI in the neighbourhood of the Mascarenes during the second week, b) active cloud formations over our region due to high moisture convergence in the region resulting in scattered thundery showers mainly in the afternoons of the third week. All regions over the island had above normal precipitation. The windward side of the Central Plateau received the greatest amount of rainfall namely 400 mm and Eastern part had the highest percentage of 170%. 11 RAINFALLANALYSIS-JANUARY 2015use same sizeIsohyets in millimetres Expressed as a percentage of the meanMonChoisyDigueSechePamplemoussesFort WilliamFUELMedineReduitAlmaSansSouciBeauChampVacoasLe ValFerneyPlaisanceBritanniaBel OmbreLe Morne200300200400300400600600500700900800300400500400800600500 400300300300MonChoisyDigueSechePamplemoussesFort WilliamFUELMedineReduitAlmaSansSouciBeauChampVacoasLe ValFerneyPlaisanceBritanniaBel OmbreLe Morne100-150150-175175-200175-200175-200150-175100-150200-225150-175200-250100-150150-175175-200150-175175-200175-200175-200200-225150-175100-150175-200150-175100-150175-200100-150100-150150-17512METEOROLOGICALSUMMARIESJANUARY2015MonthlyDatafromClimatologicalStations ( Hrs ) Mean Maximum Departure from Normal Mean Minimum Departure from Normal Mean Temperature Departure from Normal Highest Maximum Date Lowest Minimum Date Mean Realtive Humidity (AM) Mean Relative Humidity (PM) Lowest Relative Humidity Date Total Evaporation Departure from Normal Daily Max. Evaporation Date Total Sunshine Departure from Normal Mean Daily Daily Maximum Date Fort-William - - - - - - - - - -Mon L Rouillard (A.W.S) 30.2 - 23.7 - 27.0 - 32.9 16 20.9 30 Labourdonnais - - - - - - - - - - NPIPP 97.2 -61.0 7.4 31 163.7 -78.6 5.3 11.627,28 Constance - - - - - - - - - - 82 - - - 83.1 - 8.8 30 147.1 -62.3 4.7 10.5 05 FUEL 29.3 0.2 23.3 0.9 26.3 0.6 32.8 06 20.8 02 79 - - - 169.1 -43.2 5.5 12.1 03 Sans Souci 28.3 0.1 22.4 1.1 25.4 0.6 32.2 07 20.0 29 97 92 83 29 148.7 -50.8 4.8 12.0 03 Riche en Eau 29.5 0.2 23.6 0.7 26.6 0.4 33.0 06 21.6 30 Beau Vallon 29.9 0.1 24.3 0.6 27.1 0.4 33.0 06,07 22.6 30 .Mon Desert Mon Tresor 29.9 0.1 24.5 0.9 27.2 0.5 32.9 06 23.0 * 157.3 -34.4 10.0 05 172.1 -72.0 5.6 11.5 28 Britannia 28.3 -0.3 22.8 1.3 25.6 0.5 31.0 05 20.0 29 156.9 -58.4 5.1 12.1 05 Bois Cheri Tea Est. 26.8 0.0 20.6 0.5 23.7 0.3 31.3 05 18.1 02 134.0 -56.3 4.3 11.5 28 Le Morne (A.W.S) 30.5 - 25.7 - 28.1 - 33.1 06 23.7 30 Richelieu - - - - - - - - - - Medine 30.2 -0.7 24.0 1.1 27.1 0.2 31.9 05 21.4 30 87 73 55 26 129.5 -56.5 7.5 25 163.2 -67.4 5.3 11.3 28 Barkly (A.W.S) 29.5 - 23.0 - 26.3 - 31.7 06 19.9 28 - - - - Case Noyale 31.9 - 22.5 - 27.2 - 33.0 10 21.0 28 - - - - - Mon Desert Alma 28.0 -0.2 22.0 1.0 25.0 0.4 31.5 05 19.0 28 - - - - 147.1 - 4.7 12.0 28 Quatre Bornes 27.9 -1.2 23.0 1.0 25.5 -0.1 31.3 06 21.5 28 94 84 58 28 159.6 -72.9 5.1 11.2 28Mon Bois (A.W.S) 26.3 - 20.9 - 23.6 - 29.8 06 18.7 30 *Often-Data not available A.W.S: Automatic Weather StationBRIGHTSUNSHINESTATIONS ( mm )RELATIVE(C)TEMPERATURE HUMIDITY ( % )EVAPORATION13METEOROLOGICALSUMMARIESJANUARY2015MonthlyDatafromAgrometeorologicalStationsEVAPORATION BRIGHTSUNSHINE MEANSOIL HUMIDITY ( % ) ( mm ) ( Hrs ) TEMP (C) Mean Maximum Departure from Normal Mean Minimum Departure from Normal Mean Temperature Departure from Normal Highest Maximum Date Lowest Minimum Date Mean Realtive Humidity ( AM ) Mean Relative Humidity ( PM ) Lowest Relative Humidity Date Total Evaporation Departure from Normal Daily Max. Evaporation Date Total Sunshine Departure from Normal Mean Daily Daily Maximum Date Depth 30cm Depth 50cm Depth 100cm Pamplemousses 30.4 -0.8 23.4 1.3 26.9 0.3 33.2 06 20.2 30 83 79 61 05 120.2 -79.4 7.5 28 185.3 -56.7 6.0 12.0 28 29.2 - Reduit 27.9 -0.5 21.8 0.2 24.9 -0.1 30.5 06 18.5 29 88 87 66 28 133.7 -26.8 8.0 28 171.5 -64.9 5.5 12.2 28 27.4 - - BelleRive 27.0 -0.5 20.9 1.3 24.0 0.4 30.0 06 17.1 14 89 85 66 05 86.0 -35.9 6.5 05 131.1 -59.5 4.2 11.0 28 25.3 24.8 25.1 UnionPark 28.1 0.6 22.0 1.3 25.1 0.9 31.7 06 20.2 30 91 84 60 05 101.1 -40.9 6.5 05 128.9 -59.0 4.2 11.8 05 26.7 26.1 26.5 LaBaraque 29.9 -0.1 22.7 -0.1 26.3 -0.1 33.9 07 21.002,30 93 79 64 28 131.3 -61.4 7.7 28,31 142.1 -92.8 4.6 11.4 28 *Often-Data not availableSTATIONS TEMPERATURERELATIVE(C)14METEOROLOGICALSUMMARIESJANUARY 2015MonthlyDatafromSynopticStations Mean Maximum Departure from Normal Mean Minimum Departure from Normal Mean Temperature Departure from Normal Highest Maximum Date Lowest Minimum Date Mean Relative Humidity ( AM ) Mean Relative Humidity ( PM ) Mean Relative Humidity ** Difference from Normal Lowest Relative Humidity *** Date Mean MSL Pressure ** Difference from Normal Highest Mean MSL Pressure Date Lowest Mean MSL Pressure Date Total Sunshine Departure from Normal Mean Daily Daily Maximum Date Total Evaporation Departure from Normal Daily Max. Evaporation Date Plaisance 30.0 0.0 24.3 1.0 27.2 0.5 34.4 19 21.1 02 87 76 81 0 58 19 1010.0 -2.3 1015.6 26 1002.6 14,15 163.2 -77.2 5.3 12.6 05 185.7 -1.3 10.0 04 Vacoas **** 27.5 -0.4 21.9 1.1 24.7 0.3 30.6 06 19.5 30 92 82 88 4 54 04 962.2 -2.2 967.3 26 954.5 14,15 148.2 -76.6 4.8 11.7 28 93.4 -58.5 5.4 25,26 Rodrigues 29.6 0.1 24.7 0.9 27.2 0.5 32.0 08 23.0 20 86 78 82 3 67 25,29,31 1009.7 -3.0 1013.6 26 990.9 16 215.5 -51.9 7.0 11.6 02 152.0 -52.5 7.3 05 St.Brandon 31.2 0.5 26.3 0.7 28.8 0.6 35.1 07 24.5 10,13 86 79 83 2 54 02 1008.5 -2.2 1013.3 21 988.5 14 Agalega 31.4 0.3 25.2 1.1 28.3 0.7 33.2 04 23.6 02 85 73 79 -5 69 14 1011.0 1.0 1014.5 21,22 1009.1 15,29 168.2 - 5.4 10.7 29 *Often - Data not available** Mean from main synoptic hours*** Main and Intermediate synoptic hours****Station level pressureBRIGHT SUNSHINE( Hrs )EVAPORATIONSTATIONSTEMPERATURE RELATIVEHUMIDITY(C)( % ) ( mm ) ( hPa )BAROMETRICPRESSURE15MEANSEASURFACETEMPERATUREJANUARY 2015ReunionMauritiusRodriguesTromelinSt. BrandonAgalegaSeychellesDiego Garcia40 E 45 E 50 E 55 E 60 E 65 E 70 E 75 E 80 E 85 E 90 E30 S25 S20 S15 S10 S05 S28 C26 C30 C22 C20 C24 C16 SURFACEWIND-JANUARY2015WindRose(% Frequency)Mean Wind Speed (ms-1) 4.3 Mean Wind Speed (ms-1) 3.3Maximum Gust (ms-1) 18.8 Maximum Gust (ms-1) 25.0Date 13 Date 15DATA NOT AVAILABLEMean Wind Speed (ms-1) Mean Wind Speed (ms-1) 6.6Maximum Gust (ms-1) Maximum Gust (ms-1) -Date -Mean Wind Speed (ms-1) 6.6 Mean Wind Speed (ms-1) 2.1Maximum Gust (ms-1) 34.9 Maximum Gust (ms-1) -Date 16 Date -FREQ:RODRIGUES (Pte. Canon) AGALEGAPLAISANCE VACOASFORT - WILLIAM ST. BRANDONDate0 20 40 60 80 10091896141268529Calm 264162019Calm 2621154Calm6 6111310303332Calm967151419123221116Calm 26372114562 17UPPER WIND OBSERVATIONS - JANUARY 2015Vector Mean850 hPa 700 hPa 500 hPa 400 hPa 300 hPa 250 hPa 200 hPa 150 hPa 100 hPa1500 m 3000 m 5700 m 7500 m 9600 m 10800 m 12300 m 14100 m 16500 mSTATION Degkt Degkt Degkt Degkt Degkt Degkt Degkt Degkt DegktVACOAS - - - - - - - - -RODRIGUES - - - - - - - - -Maximum Wind850 hPa 700 hPa 500 hPa 400 hPa 300 hPa 250 hPa 200 hPa 150 hPa 100 hPa1500 m 3000 m 5700 m 7500 m 9600 m 10800 m 12300 m 14100 m 16500 mSTATION Degkt Degkt Degkt Degkt Degkt Degkt Degkt Degkt DegktVACOAS - - - - - - - - -RODRIGUES - - - - - - - - -Absolute Maximum WindSTATION Degkt Height (m)DateVACOAS - - -RODRIGUES - - - -Data not availableLEVELLEVEL18