meteorological services

Transcription

RE P U BL I C OF M A UR IT I U S
METEOROLOGICAL SERVICES
MONTHLY BULLETIN
of
CLIMATOLOGICAL SUMMARIES
NOVEMBER 2009
February 2010
Contents
Introduction
1-2
Map of Mauritius / Area of responsibility
3
Weather Summary
4
Rainfall in Mauritius
5-10
Mean Monthly Rainfall
11
Rainfall Analysis
12
Monthly Climatological Summaries
13
Monthly Agrometeorological Summaries
14
Monthly Synoptic Summaries
15
Mean Sea Surface Temperature
16
Surface Wind Rose
17
Upper Winds Observations
18
MONTHLY CLIMATOLOGICAL SUMMARIES
for
MAURITIUS, RODRIGUES AND OUTER ISLANDS
1. INTRODUCTION
Mauritius lies between Latitudes 19º58.8' and 20º31.7' South and Longitudes 57º18.0' and 57º46.5' East.
Rodrigues lies between Latitudes 19º40' and 19º46' South and Longitudes 63º20' and 63º30' East about 650
km East of Mauritius. St. Brandon is a coral atoll situated around Latitude 16º27' South and Longitude
59º37' East about 450 km to the North-North-East of Mauritius. Agalega consists of two small islands
between Latitudes 10º20' and 10º29' South and Longitudes 56º34' and 56º42' East, about 1050 km almost
North of Mauritius.
Monthly climatological data presented in this issue are based on daily observations of various meteorological
parameters recorded in Mauritius, Rodrigues, St. Brandon and Agalega.
2. STATIONS
Synoptic Weather Stations
Synoptic weather stations perform synoptic weather observations; that is, surface weather observations at
fixed intervals of time of sky cover, cloud base height, atmospheric pressure, temperature, dew point, wind
speed and direction, precipitation amount and other special phenomena.
The Mauritius Meteorological Services maintains six synoptic stations :
Vacoas (20º18'S, 57º30'E) WMO Station number 61995, and Plaisance (20º26'S, 57º41'E) WMO Station
number 61990, in Mauritius. Pointe Canon (19º41'S, 63º25'E) WMO Station number 61988 and Plaine
Corail (19º41'S , 63º45'E) WMO Station number 61989, in Rodrigues. Raphael Island, located at 16º27'S
and 59º37'E WMO Station number 61986, in St Brandon. Agalega located at 10º21'S 56º35'E, WMO
Station number 61974, in North Island.
Climatological Stations
Climatological stations record such parameters as: maximum and minimum temperatures, rainfall and some
other elements like atmospheric pressure, humidity, soil temperatures, sunshine and wind. The Mauritius
Meteorological Services has a network of 22 climatological stations in Mauritius.
Agrometeorological Stations
The agrometeorological stations monitor standard climatological data that are of interest to agriculture,
livestock breeding and forestry. These stations monitor the following parameters, evaporation, humidity,
rainfall, sunshine duration, temperature and wind.
The Mauritius Sugar Industry Research Institute manages four such stations in Mauritius with the
collaboration of the Meteorological Services. Savannah Sugar Estate maintains another station at La
Baraque.
3. INSTRUMENTS IN USE AT METEOROLOGICAL STATIONS:
Raingauges
Ordinary raingauges with outer rim of diameter 11.28 cm together with ordinary laboratory cylinders
graduated in cubic centimeters are being used to measure rainfall at most stations. Readings are taken at
0700 hours daily. Fourteen stations are equipped with rain recorders, which provide rainfall intensities.
Thermometers and Hygrometers
Ordinary mercury in glass thermometers are used to measure dry, wet bulb and soil temperatures. Maximum
and Minimum temperatures are measured by other appropriate thermometers. Thermohygrographs have
been installed at eight stations.
Anemometers
Nine Dines anemometers provide wind data at the following sites in Mauritius: Digue Seche, FUEL, Medine,
Mon Desert Alma, Pamplemousses, Plaisance, Port Louis Harbour Radio, 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. Two stations 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 13 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
Upper Air observations are carried out daily at Vacoas.
A GPS system using the software Icar-igor pro 5.03 is used to compute upper level winds.
Automatic Weather Stations
21 automatic weather stations have been installed at different sites over the island. Weather parameters
observed by these automatic weather stations are : humidity, rainfall, temperature, wind and pressure. Two
stations, namely Vacoas and Palmar also record global solar radiation. There are also two stations in
Rodrigues which measure all the above six parameters.
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.
Map of Mauritius showing Contours and Basin
N
Mon
Choisy
40
NN
Contours: Height (metres)
Digue
Seche
Regional Delimitations
160
Pamplemousses
NN : North
NW : North West
NW
EE : East
320
Fort William
WW : West
40
CW : Central Plateau (Windward)
FUEL
Reduit
Alma
Medine
160
WW
320
SE : South East
EE
320
SS : South
Beau
Champ
440
CL
Vacoas
40
CL : Central Plateau (Leeward)
160
SW : South West
440
Sans
Souci
CW
600
Ferney
SE
160
Le Morne
Plaisance
SW
Britannia
SS
40
Bel Ombre
Scale 1:300,000
Seychelles
05º S
Diego Garcia
10º S
Agalega
Diego Suarez
15º S
Tromelin
St. Brandon
J. de Nova
Tamatave
Tana
20º S
Rodrigues
Reunion
Mauritius
Europa
25º S
Fort Dauphin
45º E
50º E
55º E
60º E
65º E
70º E
75º E
80º E
85º E
90º E
Area of responsibility of the Republic of Mauritius for the naming of tropical Cyclones
WEATHER SUMMARY - NOVEMBER 2009
During the first week of November 2009 the Inter Tropical Convergence Zone began to flare up
south of the equator with a shallow low developing to the north of Agalega. However, this low
was short-lived. As convective activity became more persistent by the second week, another
marked low appeared in the vicinity of Diego Garcia. This one intensified further into a moderate
tropical storm and was named Anja on the evening of November 14.
Anja, the first named system of the cyclonic season 2009/2010 intensified quite rapidly into a
tropical cyclone. It moved in a general southwesterly direction and approached Rodrigues Island
as a severe tropical storm. Since Anja represented a potential threat to the island, a cyclone
warning of class 1 had to be issued on November 17. Anja passed at a distance of about 220
km off the east coast of Rodrigues on the 18th, however the island did not experience any
severe weather associated with this storm. Rainfall recorded was insignificant and highest gusts
of the order of 65 km/h were recorded at Citronnelle.
Unsettled weather to the east of Agalega lead to the formation of another low which eventually
developed into a moderate tropical storm during the third week of November. This system was
named Bongani on November 23. Bongani was short-lived and it did not influence the
Mascarenes. On its west-northwesterly track it passed to the north of Agalega.
The beginning of the month was marked by a heavy rainfall event over Mauritius, due mainly to
the advection of active clouds bands from the northwest. Thereafter, the island experienced
rather settled weather. Atmospheric conditions became unstable and conducive for heavy
precipitation again as from mid-November. An easterly wave coming in phase with a westerly
trough on the 700 hPa, gave heavy rainfall of the order of 100mm at a few stations on the 17.
This event caused flooding in some regions of the island.
The total rainfall for the month of November over Mauritius amounted to a mean of 183.6 mm
representing 130% above the normal. Rodrigues had below rainfall amount with only 46.3% of
the normal for the month. Agalega received 228.4 % of the normal and St Brandon recorded
around 100%.
The maximum temperature at Mauritius was near average whereas the minimum was slightly
above the average. Temperatures in outer islands were slightly above the climatological mean.
Rainy episodes during the month of November caused the bright sunshine hours to be below
normal over Mauritius.
The mean sea level pressure was slightly below the long-term mean at all stations.
RAINFALL IN MAURITIUS
STATIONS
Alt
Location
m
Total
mm
Dep
from
Normal
---
NOVEMBER 2009
No of days on which RR
Maximum
reached or exceeded
Rainfall
1
5
10
25
50 in 24 hr
Date
mm mm mm mm mm
mm
REGION : NORTH
Cap Malheureux
Mont Choisy
Sottise
Mapou Cour
St. Antoine (Cour Usine)
Bain Boeuf (AWS)
Digue Seche
Solitude (La Plaine)
Mon Loisir Rouillard (AWS)
Mon Loisir Rouillard
Fond du Sac
Mapou (BVM)
Fleurant
Forbach (BVM)
Fair Fund
Belle Vue (BVM)
Labourdonnais
L'Esperance (BVM)
NPIPP
St. Andre (Cour)
Mauricia ( B.V.M. )
Schoenfield
St. Andre (AG22)
Mon Choix
Beau Plan
Beau Sejour
Champ Rose
Pamplemousses ( MSIRI )
Maison Blanche
Mon Loisir S.E.
The Mount
Esperance (Beau Plan)
Belle Vue Maurel
Mon Piton
Antoinette
Grande Rosalie
Mon Songe
California
Industrie ( Cour )
REGION: NORTH WEST
594374
12333
12342
16382
24391
510360
36396
48322
20370
19371
26345
28360
29387
35375
39347
39356
40365
42386
36342
46336
46353
46396
50328
56366
57340
57379
59327
61346
64351
66404
67357
70347
74400
63370
74381
79362
81381
91369
100355
3
9
18
40
30
7
30
30
55
49
40
64
46
58
84
104
73
69
55
91
40
44
122
65
114
41
79
96
64
119
88
97
177
171
198
186
262
180
121.0
112.9
128.9
156.3
105.0
118.8
112.0
126.4
155.0
126.8
152.0
147.2
171.0
159.0
132.9
118.8
148.0
109.3
113.0
136.0
116.0
121.9
112.0
154.4
159.0
117.0
201.8
149.0
144.4
157.5
274.5
177.1
164.5
202.5
102.0
84.3
80.4
94.9
113.0
71.0
83.8
112.1
92.1
108.2
111.6
126.5
112.8
81.7
103.9
68.6
86.7
73.8
70.3
75.8
104.9
102.8
63.1
136.4
98.9
90.4
103.4
208.0
111.8
78.0
118.5
48.7
12
4
5
7
10
9
5
8
6
4
7
7
7
9
8
6
9
6
5
7
4
7
4
7
3
7
8
3
7
7
14
12
11
13
5
4
3
3
4
2
4
3
5
6
4
4
5
4
5
4
4
4
4
3
3
3
3
3
3
3
4
3
3
4
3
4
5
3
6
4
3
2
3
3
2
3
3
3
4
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
2
2
2
2
2
1
2
2
3
3
2
3
3
3
3
3
1
3
3
2
3
3
3
2
3
3
3
3
3
2
3
3
3
3
2
1
1
1
2
2
1
0
0
0
1
1
1
2
2
1
0
1
1
0
1
1
1
0
1
1
2
0
2
2
2
1
3
1
1
2
1
50.0
68.0
51.4
61.0
70.2
40.9
49.0
47.6
51.0
75.0
58.0
51.6
65.0
62.0
49.8
63.0
69.0
44.5
51.0
69.5
54.0
43.4
55.0
62.5
62.0
41.7
71.1
65.0
64.8
64.4
96.5
78.7
69.3
88.9
71.0
17
17
1
1
17
17
Massilia
Cantin
Balaclava (AWS)
Richeterre (Versailles)
Cite La Cure
Fort William ( P.L.H.R. )
66315
73303
50310
76310
88313
91287
40
24
18
30
40
6
133.1
105.4
94.0
98.4
70.3
4
5
5
3
3
3
3
2
1
2
2
1
1
1
1
63.0
65.6
73.0
17
17
17
* Often
- Data not available
17
17
1
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
aws: automatic weather station
---
NOVEMBER 2009
Maximum
reached or exceeded
Rainfall
1
5
10
25
50 in 24 hr
Date
mm
mm mm mm mm mm
Alt
Location
m
Total
mm
Dep
from
Normal
Port Louis (aws)
Le Souvenir
Amitie ( I )
Amitie (2)
Notre Dame
Domaine Les Pailles (aws)
Valton
Beau Fonds
REGION : WEST
100300 5
69336 70
74335 85
81324 88
85334 131
117293 90
92335 146
91349 236
52.6
98.0
118.0
116.0
114.6
102.0
115.0
60.3
85.9
71.5
54.5
66.1
6
3
5
5
8
5
5
2
3
3
3
3
4
4
1
3
3
3
3
2
3
1
3
2
1
1
1
1
0
0
1
1
1
1
1
37.6
47.0
70.0
72.0
73.0
75.0
73.0
17
17
17
17
17
17
17
Pointe aux Sables
Albion (Medine)
Albion (aws)
Balisage
Petite Riviere Noire
Case Noyale
Petit Verger
Richelieu
Gros Cailloux
St Antoine (Medine)
La Mecque
La Ferme
Belle Vue (Medine)
Medine (Medine)
Palmyre (No.1)
Clarens (Medine)
La Verette
Magenta
Tamarin ( Estate )
Yemen
Beaux Songes (aws)
Chebel
Bagatelle (Medine)
Le Bosquet
Barkly ( Exp. Station )
Le Reduit ( MSIRI )
La Chaumiere (R.B. No1)
Trianon (Estate)
Corps de Garde
Beaux Songes (Medine)
Pierrefonds
Bassin
REGION : SOUTH WEST
102272
127240
120240
138232
232223
242220
109260
113272
124254
134249
149234
152248
153228
155233
168233
178236
190247
191260
193238
202242
160250
125270
131292
133263
133272
139293
140259
150291
162264
160250
171261
177268
15
12
5
40
3
15
52
67
82
116
85
140
61
91
91
67
72
88
43
67
225
162
302
183
207
311
174
305
281
225
278
314
127.1
129.6
166.3
114.8
141.0
136.8
110.7
150.6
130.2
181.0
191.9
160.0
220.5
126.1
140.0
135.1
163.9
149.8
116.5
137.2
109.6
138.5
114.7
211.8
123.2
147.0
174.5
126.3
109.7
150.9
76.7
116.5
116.6
89.7
129.2
101.2
164.7
166.2
134.7
197.7
98.6
99.4
105.6
134.1
93.3
96.8
90.7
68.8
188.2
111.9
141.7
93.8
7
8
7
5
5
7
6
6
5
6
6
4
4
4
6
4
4
8
5
8
5
5
8
4
9
6
4
3
5
3
5
3
4
3
3
5
4
6
6
4
3
3
3
4
4
5
3
3
3
4
3
3
3
5
3
3
2
2
3
3
2
2
2
2
3
5
3
3
3
3
3
3
3
3
2
3
3
3
3
3
3
3
3
3
2
2
3
2
2
2
2
2
3
2
2
3
2
1
2
1
2
1
2
2
2
2
2
3
2
1
3
2
1
1
1
0
1
1
0
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
70.0
67.4
79.9
42.0
80.0
73.7
46.0
75.2
71.0
80.0
104.0
90.0
138.0
88.7
75.0
90.3
84.6
84.0
72.5
83.1
64.0
85.0
67.0
133
65.3
86
79.5
65.2
17
17
17
7,17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
La Gaulette
Le Morne (AWS)
Le Morne Brabant
Coteau Gambier
250215
260190
273184
265190
10
2
3
55
125.6
104.6
131.0
130.3
83.0
94.2
-
5
6
6
7
3
3
3
4
3
3
3
3
3
2
2
2
0
0
2
1
48
40
50.0
50.0
17
7
7
17
STATIONS
REGION : NORTH WEST
* Often
-
Data not available
STATIONS
Alt
Location
m
Total
mm
Dep.
from
Normal
---
NOVEMBER 2009
Maximum
reached or exceeded
Rainfall
1
5
10
25
50 in 24 hr
Date
mm mm mm mm mm
mm
REGION : SOUTH WEST
Embrasure
La Crete
Terres Couleurs
Chamarel ( Estate )
Plaine Champagne
REGION : SOUTH
268204
253230
262220
262230
254258
45
290
259
267
701
106.0
91.0
148.8
44.6
27.6
29.9
7
7
11
4
3
6
3
3
4
1
2
1
1
0
1
64.0
42.0
77.6
17
17
17
Beau Champs (B.O)
Bel Ombre
St Felix (Factory)
Bel Air St. Felix
Terracine
Souillac (aws)
Cascades
Choisy Estate
Chamouny
Frederica
Canal Vacoas
Ste. Marie
Fontenelle
St. Aubin
Riviere des Anguilles
Bel Air (Benares)
Union Savanne
Val Riche
Luchon
Satana
Combo
Bois Sec (U)
Bois Cheri
Pradier
Grand Bassin (aws)
REGION : SOUTH EAST
299260
301244
301277
305288
306308
310320
283273
288223
289279
290250
294241
295273
297315
300322
301330
302339
304322
274261
275273
289260
287319
265306
254312
249297
240295
21
8
24
40
30
28
153
70
131
125
46
53
94
86
82
49
64
305
236
168
175
439
475
600
605
120.0
123.5
133.0
216.0
173.8
125.8
142.6
122.2
141.0
236.0
235.1
177.0
192.0
194.0
218.0
184.4
132.0
173.0
195.0
215.8
216.8
221.4
32.5
56.7
66.4
141.8
46.9
63.6
55.5
59.1
151.8
148.1
97.4
117.5
111.9
97.0
28.1
44.3
74.3
50.6
40.4
-
9
7
5
13
11
6
6
6
9
13
11
10
10
13
12
12
9
13
13
20
15
20
6
3
5
6
4
3
4
3
5
7
5
4
7
5
7
6
5
6
7
7
7
8
2
2
3
4
3
2
2
2
3
4
4
3
3
4
4
5
3
4
5
5
3
3
1
2
1
2
2
2
1
2
2
2
2
2
2
2
2
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
72.0
75.0
90.0
100.0
96.0
73.0
104.0
74.0
74.0
100.0
144.7
115.0
118.0
100.0
136.0
100.0
76.0
100.0
100.0
120.3
131.0
117.2
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
Pointe aux Feuilles
Bestel
Camizzard
Providence (F)
Ferney
Le Vallon
Campement
Ste Helene
Beau Vallon (Cour)
Terre Rocheuse (BVWest)
Terre Rocheuse (RLChaux)
Mon Desert ( M.D.M.T. )
Riviere Tabac
Florine
183463 15
204403 15
208417 21
215439 24
216420 6
220410 3
203413 20
251405 40
252416 21
257413 27
260424 9
271403 23
293378 31
211390 145
164.5
335.9
348.4
205.1
354.5
262.6
228.0
164.5
191.2
174.4
179.4
174.3
116.6
217.1
103.0
214.0
230.8
137.2
255.8
176.7
93.0
126.5
113.3
124.8
97.5
41.6
106.6
8
18
16
11
15
12
11
8
10
10
7
8
7
13
3
9
9
5
7
5
4
4
4
3
2
2
2
9
3
5
5
4
4
4
3
3
2
2
2
2
1
4
3
4
4
3
4
3
2
2
2
2
2
2
1
2
1
2
3
2
2
2
1
2
2
2
2
1
1
1
64.5
146.7
154.9
72.4
182.1
120.4
146.5
77.5
102.8
93.8
118.0
126.0
101.0
100.6
17
17
17
17
17
17
17
17
17
17
17
17
17
17
* Often
-
Data not available
STATIONS
Alt
Location
m
Total
mm
Dep.
from
Normal
---
NOVEMBER 2009
Maximum
reached or exceeded
Rainfall
1
5
10
25
50 in 24 hr
Date
mm mm mm mm mm
mm
REGION : SOUTH EAST
Le Val
Cent Gaulettes
Riviere des Creoles
Riche En Eau
Riche En Eau (aws)
Astroea (R.E.E)
Courbevoie
Ruisseau Copeaux
Mon Tresor
Plaisance
Gros Bois
Union Vale
Sauveterre
La Baraque
Colmar Siding Benares
Savinia
Chateau Benares
Savanah
St. Felix (B.A.S.E)
Benares
Montagne Ronde
Eau Bleu Tostee
Mont Vernon
Astroea (R.B)
Rose Belle
Deux Bras
New Grove
Hewetson
St. Avold
Joli Bois
Britannia
Riche Bois (B)
REGION : EAST
213373
214384
220389
231394
233379
243400
250385
254392
261410
264365
267389
276390
280371
284334
285380
288349
291365
293339
296349
201387
227363
232369
233360
238355
239278
251361
261341
262331
264349
271334
274346
137
145
134
110
163
69
114
73
50
160
58
49
76
168
49
107
58
122
76
216
213
287
274
280
158
219
255
293
216
229
191
219.6
206.8
208.5
191.0
176.8
173.8
192.4
169.5
154.5
136.7
141.2
125.2
166.3
133.6
173.6
157.5
168.0
181.6
240.8
124.7
152.8
285.0
158.7
186.6
149.7
164.4
161.7
105.3
104.2
103.6
65.2
88.4
105.7
92.6
47.5
58.6
62.1
22.2
67.4
41.2
71.3
68.7
71.9
103.4
85.3
-12.0
29.1
198.2
31.4
62.8
34.6
47.3
51.9
12
13
9
11
9
9
8
9
13
10
10
10
9
9
11
10
11
11
14
12
9
13
14
14
13
11
13
9
7
7
6
5
5
5
2
7
3
3
2
4
2
3
3
6
3
11
3
7
7
6
5
6
5
4
3
4
7
4
3
3
3
2
3
2
2
2
2
2
2
2
2
2
5
3
2
5
2
3
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
2
1
1
1
2
2
3
1
2
3
1
1
1
1
2
2
2
1
1
1
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
101.0
93.0
90.5
90.8
103.6
78.0
90.2
92.5
87.0
100.1
102.2
87.0
110.0
109.5
115.0
117.0
110.0
118.9
103.0
72.8
75.4
127.5
102.3
112.8
98.9
102.4
95.4
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
Haute Rive
Bras D'Eau
Providence (P.de Flacq)
Bassin Requins
Constance
Belle Mare
Mare La Chaux
Palmar (aws)
Beau Rivage
Beau Champ - Littoral
Grande Retraite (La Retraite)
Allendy (BV)
Argy
67429 18
82443
9
100441 6
102452 8
107424 40
116461 3
117451 20
138480 5
153472 3
164465 15
97404 113
116414 109
116439 43
109.0
77.0
152.5
186.5
202.0
162.0
203.0
240.0
284.3
155.3
213.0
204.0
225.5
71.0
29.8
88.1
130.4
138.9
102.4
140.7
232.0
96.4
137.5
123.1
155.1
6
2
8
9
11
6
6
12
8
7
14
15
14
3
2
3
4
3
4
4
4
4
4
6
5
4
3
2
3
3
3
3
3
4
4
3
3
3
3
2
2
3
3
3
3
3
3
3
3
2
3
3
0
0
1
1
2
2
3
2
3
1
2
1
3
48.0
40.0
61.0
74.0
90.0
59.0
77.0
125.0
105.4
60.2
80.0
90.0
86.0
1
17
1
1
25
1
25
1
17
25
25
25
25
* Often
-
Data not available
STATIONS
Alt
Location
m
Total
mm
Dep
from
Normal
---
NOVEMBER 2009
Maximum
reached or exceeded
Rainfall
1
5
10
25
50 in 24 hr
Date
mm
mm mm mm mm mm
REGION : EAST
FUEL ( UNION )
La Gaiete
Queen Victoria
Queen Victoria (aws)
Belle Etoile
Naye
Caroline
Clemencia
Belle Rose (DRBC)
La Lucie
Terre Franche (DRBC)
Grand Port (DRBC)
Trois Ilots
La Louise (T. Rocheuse)
Olivia
Beau Vallon (DRBC)
Etoile
Belle Rive (DRBC)
Rich Fund
Unite
Gibraltar
Bel Etang
Sans Souci
REGION : CENTRAL
PLATEAU WINDWARD
127410
128435
132424
130420
137453
139440
148450
153421
153434
154441
166438
167458
171449
174421
178441
178449
183442
186431
125399
138401
138412
145391
178392
146
64
125
112
71
85
64
119
82
73
79
64
91
156
101
110
116
116
189
226
165
265
277
235.6
281.7
230.0
214.4
162.5
277.8
268.9
182.4
133.8
90.2
177.2
176.8
205.0
161.9
241.6
264.2
212.2
205.4
220.6
228.6
210.6
234.7
311.2
153.6
208.5
147.3
109.5
201.9
202.4
97.8
50.9
12.3
85.6
108.8
129.4
65.9
151.9
194.1
100.2
98.0
130.3
122.5
119.4
119.7
171.2
14
13
14
14
5
10
9
9
5
5
6
8
9
10
11
9
13
12
12
14
11
15
14
4
4
5
7
3
3
3
4
3
3
5
3
4
4
5
5
5
5
3
6
4
6
10
3
3
4
4
3
3
3
4
3
3
3
3
3
3
5
5
5
3
3
3
4
3
6
3
3
3
3
2
3
3
2
2
2
3
3
3
2
3
4
2
2
3
2
3
2
3
2
3
2
2
1
3
3
2
1
0
2
2
2
2
2
3
2
2
2
2
2
2
3
85.9
108.3
83.8
73.4
88.0
104.6
102.0
79.7
70.0
45.0
66.0
68.0
80.0
78.2
86.0
80.8
102.2
90.0
87.0
100.0
78.6
97.5
104.0
25
25
17
17
25
25
25
17
25
25
17
25
25
17
17
25
17
17
17
17
17
17
17
Bonne Veine (MDA)
Providence
Providence (aws)
Grosse Roche
Piton du Milieu
Eau Bleue Dam
Union Park ( MSIRI )
Beau Climat
La Flora
Nouvelle Decouverte(aws)
Belle Rive (1E)
Belle Rive ( 2E )
XVI Mile(Mon Bois)(aws)
REGION : CENTRAL
PLATEAU LEEWARD
143353
146371
148367
172375
175346
211357
230344
234336
248334
110350
170335
174335
200320
433
369
378
335
442
347
357
390
360
480
476
467
590
192.5
238.0
217.8
249.1
164.1
243.3
229.8
186.5
180.4
219.1
202.5
207.2
67.5
119.2
26.2
92.8
91.5
53.7
98.8
80.5
-
11
15
15
16
15
15
13
14
10
15
15
18
5
9
7
6
6
9
8
7
4
7
7
11
4
6
4
5
4
4
4
2
3
5
3
4
2
2
2
3
1
2
2
1
2
2
1
2
1
1
1
1
1
2
1
1
1
1
1
1
109.5
102.4
107.0
126.0
85.9
115.0
109.5
110.2
98.0
109.0
103.6
92.0
17
17
17
17
17
17
17
17
17
17
17
17
Beau Bois (MDA)
Mon Desert Alma
Minissy (MDA)
Minissy (H)
Moka (aws)
Cote d'Or
Bagatelle (H)
124335
133316
135302
143306
130300
147315
151308
436
367
354
366
344
412
393
177.8
173.7
141.4
147.9
123.8
170.1
159.5
82.9
108.4
84.3
95.8
104.3
106.2
10
9
8
9
10
11
9
4
5
3
4
4
5
4
3
4
3
3
3
4
3
3
3
2
2
1
3
3
1
1
1
1
1
1
1
106.7
89.1
84.2
85.0
69.0
83.5
74.5
17
17
17
17
17
17
17
* Often
-
Data not available
STATIONS
---
NOVEMBER 2009
Maximum
Dep
reached or exceeded
Rainfall
Alt. Total
Location
from
m
mm
1
5
10
25
50 in 24 hr
Normal
Date
mm
mm mm mm mm mm
REGION : CENTRAL
PLATEAU LEEWARD
Quatre Bornes ( Michaud )
Highlands
Vacoas
Burgos
Reunion
Holyrood
Moon
Alma
Valetta
Hermitage
Belle Rive (MSIRI)
Wooton
Henrietta
Trou aux Cerfs (aws)
La Marie
Tamarin ( Res. )
Bonne Fin
Good End
Mare Longue
Arnaud
Arnaud (aws)
Petrin
159280
164305
176294
182258
184293
186275
192276
144340
152334
161318
168326
182316
199281
178310
201290
211275
214283
216294
225275
228295
170290
243275
353
421
424
396
433
396
430
451
448
454
488
564
469
614
353
485
536
564
579
576
580
655
154.3
187.2
147.9
129.1
135.7
148.4
135.7
189.6
163.6
185.0
149.8
141.0
221.4
130.4
189.9
153.3
206.8
157.6
243.2
246.0
170.5
105.4
129.4
83.2
101.2
76.2
115.0
96.2
81.9
60.2
106.1
35.9
93.7
62.9
124.9
87.8
97.9
63.0
119.2
37.5
10
13
9
3
9
4
6
14
13
12
13
5
14
9
10
4
14
11
16
18
12
4
4
5
3
4
3
3
5
5
7
7
4
8
6
4
4
6
5
8
7
7
3
3
3
3
4
3
3
4
3
3
3
3
4
4
3
3
4
4
4
4
4
2
3
1
2
1
2
1
2
1
3
2
1
1
2
3
2
1
1
2
3
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
77.1
96.4
83.8
63.8
79.3
76.0
88.7
110.5
95.3
82.4
74.8
90.0
116.4
65.0
101.2
88.9
119.2
87.6
126.0
113.2
91.0
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
17
Pointe Canon
Corail Airport
Citronelle (aws)
REGION :
AGALEGA ISLANDS
407255 58
454216 33
418265 335
32.4
18.3
46.8
-37.6
-46.3
-
9
8
11
2
0
3
0
0
0
0
0
0
0
0
0
8.1
4.5
9.4
18
19
18
Agalega
10º 21' S
56º 35' E
3
251.8
142.1
17
7
5
3
1
113.7
21
16º 27' S
59º 37' E
4
26.9
0.0
6
2
0
0
0
8.2
17
REGION : RODRIGUES
REGION :
ST. BRANDON ISLANDS
St. Brandon
* Often
-
Data not available
MEAN MONTHLY RAINFALL NOVEMBER 2009
Isohyetal Analysis ( mm )
REGION
NORTH
NORTH
WEST
HEIGHT
EAST
WEST
0 -- 40
130
90
188
120
40 -- 160
141
122
224
138
160 -- 320
190
127
252
320 -- 440
174
128
271
440 -- 600
169
600 -- 680
208
148
130
81
192
166
131
145
113
198
186
137
122
226
162
319
201
148
146
95
247
182
223
142
125
95
203
214
216
125
>680
Total Mean
CENTRAL PLATEAU SOUTH
SOUTH
SOUTH
Windward Leeward
EAST
WEST
230
143
116
225
136
229
225
175
198
184
136
Mean Rainfall over Mauritius : 180 mm
Percentage Rainfall of Long Term Mean : 225 %
November 2009 is one of the wettest since 1904 and is actually the wettest since 1972. Mean
rainfall was well above the seasonal mean amounting to 180 mm over the island representing
225% of the long term mean of 1971-2000.
The first half of the month was rather dry except for the first two days where remnants of a
frontal system resulted in some scattered showers. The second half turned out to be wet with
two marked rainfall events from the 17-18 and 24-26. On both occasions rainfall associated
with an easterly wave crossed the island. Coupled with a very moist and unstable atmosphere,
it resulted into widespread rainfall which was locally of moderate intensity.
All regions of the island had well above normal precipitation. The windward side of the Central
Plateau recorded the highest amount namely 130 mm but the West had the highest percentage
of rainfall that is 437%.
RAINFALL ANALYSIS - NOVEMBER 2009
Expressed as a percentage of the mean
Isohyets in millimetres
Mon
Choisy
Mon
Choisy
300-400
150
Digue
Seche
Digue
Seche
Pamplemousses
Pamplemousses
300-400
200-300
Fort William
Fort William
300-400
100
500-600
150
Reduit
Reduit
700-800
Alma
FUEL
200
300-400
Beau
Champ
Medine
Alma
Beau
Champ
600-700
Medine
200
150
400-500
Vacoas
Vacoas
200-300
Sans
Souci
Sans
Souci
300
200-300
Ferney
Ferney
Le Val
Le Val
100-200
200
200
150
Plaisance
Le Morne
Le Morne
Plaisance
Britannia
150
Bel Ombre
300-400
300
100
250
400-500
250
FUEL
Britannia
Bel Ombre
200-300
METEOROLOGICAL SUMMARIES
NOVEMBER 2009
Monthly Data from Climatological Stations
TEMPERATURE
(ºC)
STATIONS
2,7 243 -8
14 195 -25
185 -35
198 -11
8.1
6.5
6.2
6.6
4
21
14
11
12
7.7 11.5 16,19
6.8 11.9 5
5.8 11
5
11.9
11.1
11.5
11.0
Depth 100cm
20
Depth 50cm
8.3
7.2 11.5
MEAN SOIL
TEMP (ºC)
Depth 30cm
8.5
8.0
Date
170 1
19.0 22 87 75 60 22 125 18.0 4
83 73 49 22
90 80 62 22
19.0 21
20.6 8
18.0 17
182 -19
18.5 1
14.5 23
21.3 17
124 -25
18
22 77 67 51 14 146 -48
85 82 64 19
17.5 22 91 74 51 4
15.0 21
216 -46
Daily Maximum
6
Mean Daily
7.4
Departure from Normal
172 -37
BRIGHT SUNSHINE
( Hrs )
Total Sunshine
30.0 6
29.5 6
31.5 8
30.4 6
32.0 6
29.1 6
29.2 6
34.0 11
31.5 10
28.8 10
26.5 8, 20
Date
21
-
27.9 -0.4 21.3 -0.1 24.6 -0.3
26.8 -0.3 21.0 1.6 23.9 0.6
29.9 3.4 21.3 1.3 25.6 2.4
27.9 0.7 22.4 1.5 25.2 1.1
28.1 1.1 20.7 0.7 24.4 0.9
27.1 1.0 20.1 2.1 23.6 1.6
25.3 0.7 18.3 1.4 21.8 1.1
29.7
23.1
26.4
29.1
0 20.9 0.9 25.0 0.4
26.9 -0.5 20.3 1.37 23.6 0.4
24.3
17.7
21.0
Daily Max. Evaporation
19.5
-
Date
12
-
EVAPORATION
( mm )
Total Evaporation
Lowest Minimum
32.0
-
Date
Date
0.5
-
Lowest Relative Humidity
Highest Maximum
26.5
-
Mean Relative Humidity ( PM )
1.0
-
Mean Realtive Humidity ( AM )
Mean Temperature
30.1 -0.1 22.8
-
Mean Minimum
Mean Maximum
Fort-William
DigueSeche
Labourdonnais
NPIPP
Constance
FUEL
Sans Souci
Le Val (aws)
Rose Belle
Riche en Eau
Beau Vallon
Sauveterre
Britannia
Bois Cheri Tea Est.
Le Morne (aws)
Richelieu
Medine
Barkly Exp. Station
Case Noyale
Mon Desert Alma
Quatre Bornes
Trou aux Cerfs (aws)
* Often
RELATIVE
HUMIDITY ( % )
.
230 -33
204 -21
174 -26
6 20,27
6.8 14 248 8.3
241 7.4
170 240 0.5
8.3
12
8.0 12.0
5.7 12
8.0 11
*
20
20
3
METEOROLOGICAL
SUMMARIES
NOVEMBER 2009
Monthly Data from Agrometeorological Stations
TEMPERATURE
(ºC)
STATIONS
EVAPORATION
( mm )
Depth 30cm
Depth 50cm
84
78
62
4,5 166
8.0
20
248 -13
8.0 12.4
20
-
26.2
8.0
7
227 -20
7.3 11.6
16
25.7 23.5 24.3
26.4 1.0 18.2 1.7 22.3 1.4 28.5 20 14.4 23
84
74
58
22
102 -23
4.7
29
216
7.0 11.4
5
24.3 23.6 23.7
26.4 1.2 19.2 1.6 22.8 1.4 29.9
6
16.4 23
83
81
64
4
111 -27
6.5
10
180 -21
5.8 10.7 11, 20 23.7 23.1 23.1
28.0 0.5 21.0 1.1 24.5 0.8 32.7
7
18.7
89
71
60
7
164 -40
9.2
21
224 -20
7.2 12.1
2
2
16
Depth 100cm
Date
26.6 0.0 19.0 0.6 22.8 0.3 28.5 20 15.1 23
Daily Maximum
152 -37
Mean Daily
Total Evaporation
22
Date
Total Sunshine
58
MEAN SOIL
TEMP (ºC)
Date
76
BRIGHT SUNSHINE
( Hrs )
Mean Realtive Humidity ( AM )
91
4
Date
Lowest Minimum
Date
28.8 -1.2 20.1 1.0 24.5 -0.1 30.7 20 14.8 22
Highest Maximum
* Often
La Baraque
Mean Temperature
Union Park
Belle Rive
Mean Minimum
Reduit
Mean Maximum
Pamplemousses
RELATIVE
HUMIDITY ( % )
METEOROLOGICAL
SUMMARIES
NOVEMBER 2009
Monthly Data from Synoptic Stations
TEMPERATURE
(ºC)
STATIONS
RELATIVE HUMIDITY
(%)
BAROMETRIC PRESSURE
( hPa )
BRIGHT SUNSHINE EVAPORATION
( Hrs )
( mm )
Date
3
53
22
Rodrigues
28.5 1.1 22.8 1.5 25.7 1.3 30.6 18 21.0 15 80 69 76
1
52
23 1014.9 -1.6 1018.4 27 1009.8 18 283
St.Brandon
30.1 1.9 24.9 1.4 27.5 1.7 32.7
-2
60
29 1013.0 -1.7 1016.7 21 1009.1 17
Agalega
30.7 0.4 24.7 1.0 27.7 0.7 31.7 24 22.2 8
6
63
27 1010.5 -1.2 1013.4 20 1008.0 16 196
7.4 11.8 20 135 -23 8.5 21
8
9.1 11.5 5, 6 177 -31 8.1 23
-
6.3 11.5 8, 11
*** Station level pressure
19
Total Evaporation
Date
Daily Maximum
16.8 22 88 72 83
6 229 -8
Mean Daily
8
** Mean from main synoptic hours
Total Sunshine
26.0 0.2 19.2 1.4 22.6 0.8 28.4
966.6 -1.3 972.9 20 962.4
Date
Lowest Mean MSL Pressure
Date
Date
Highest Mean MSL Pressure
Vacoas ***
89 80 85
Difference from Normal
Difference from Normal
22 1015.2 -1.2 1020.0 21 1009.8 7 221 -31 7.1 11.6 16 177 -7 8.1 20
23.8 17 82 72 77
Mean MSL Pressure **
Mean Relative Humidity **
Mean Relative Humidity ( AM )
Date
50
7
Lowest Minimum
-1
Data not available
Date
Highest Maximum
Mean Temperature
20.2 23 81 71 77
-
6
Often
Mean Minimum
28.0 0.0 22.0 1.6 25.0 0.8 30.6
*
Mean Maximum
Plaisance
MEAN SEA SURFACE TEMPERATURE - NOVEMBER 2009
28 C
26 C
24 C
22 C
20 C
18 C
SURFACE WIND - NOVEMBER 2009
Wind Rose (% Frequency)
PLAISANCE
2
3
5
VACOAS
3
15
Calm
7
32
3
41
2
10
(ms-1)
Mean Wind Speed
Maximum Gust
Date
5
1
18
4
1
Calm
1
2
1
2
4.0
(ms ) 14.3
21
7
(ms-1)
Mean Wind Speed
Maximum Gust
Date
-1
FORT - WILLIAM
35
3.3
-1
(ms ) 16.5
21
ST. BRANDON
7
1
3
17
1
Calm
0
5
11
1
45
Calm
3
2
44
4
3
2
1
14
1
-1
Mean Wind Speed
Maximum Gust
Date
(ms ) 2.5
(ms-1) 16.0
4
-1
Mean Wind Speed
Maximum Gust
Date
22
RODRIGUES (Pte. Canon)
31
(ms )
(ms-1)
4.8
-
AGALEGA
6
6
22
2
Calm
2
2
1
16
3
4
6
Mean Wind Speed
Maximum Gust
Date
0
21
1
1
FREQ:
Calm
10
46
20
40
(ms-1)
6.0
(ms ) 18.7
16
Mean Wind Speed
Maximum Gust
Date
-1
60
80
100
15
(ms-1)
(ms-1)
36
2.7
-
UPPER WIND OBSERVATIONS - NOVEMBER 2009
Vector Mean
LEVEL
850 hPa
1500 m
700 hPa
3000 m
500 hPa
5700 m
400 hPa
7500 m
300 hPa
9600 m
250 hPa
10800 m
200 hPa
12300 m
150 hPa
14100 m
100 hPa
16500 m
STATION
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
VACOAS
-
-
-
-
-
-
-
-
-
RODRIGUES
-
-
-
-
-
-
-
-
-
Maximum Wind
LEVEL
850 hPa
1500 m
700 hPa
3000 m
500 hPa
5700 m
400 hPa
7500 m
300 hPa
9600 m
250 hPa
10800 m
200 hPa
12300 m
150 hPa
14100 m
100 hPa
16500 m
STATION
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
Deg kt
VACOAS
-
-
-
-
-
-
-
-
-
RODRIGUES
-
-
-
-
-
-
-
-
-
Absolute Maximum Wind
STATION
Deg kt Height (m)
Date
VACOAS
-
-
-
RODRIGUES
-
-
-

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