Amount of precipitationAmount of precipitation(mm)
Type of precipitationType of precipitation
Risks:
Precipitation riskPrecipitation risk(%)
Storm risk.(%)
Brightness:
Visibility(km)
Pressure(hPa)
UV
Temperature
Air tempAir temp
Perceived temp
Air temp
Perceived temp
Offshore
Offshore wind
Offshore sea(m)
20
15
10
5
30
20
10
0
10
5
0
20
15
10
5
10
5
0
1
0.5
0
3
0
20
15
10
5
70
65
60
55
50
45
Thu 16
21h
22h
23h
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
20h
Run : 15/04 00ZMesh : 4kmUpdated, 17min agoUpdate imminent
Thu 16
21h
22h
23h
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
20h
245°SWWSW
240°SWWSW
240°SWWSW
235°SWSW
240°SWWSW
240°SWWSW
235°SWSW
235°SWSW
240°SWWSW
235°SWSW
235°SWSW
235°SWSW
235°SWSW
235°SWSW
220°SWSW
210°SWSSW
205°SWSSW
205°SWSSW
215°SWSSW
210°SWSSW
215°SWSW
220°SWSW
230°SWSW
240°SWWSW
11216134
10185113
815493
612373
612373
612373
611372
612373
612373
612373
611372
510362
510362
510362
611372
510362
611372
612373
713483
814493
814493
612373
611372
59362
16298185
15278174
13257164
12236144
11216134
11216134
11216134
12226144
12236144
12226144
11206124
10185113
10195123
11206124
12226144
12236144
13247154
14267164
15288174
15288174
16298185
15288174
13247154
11206124
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.6
0.2
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0
0
0
220°SWSW
220°SWSW
220°SWSW
220°SWSW
220°SWSW
225°SWSW
225°SWSW
235°SWSW
235°SWSW
225°SWSW
225°SWSW
220°SWSW
220°SWSW
215°SWSW
225°SWSW
190°SS
225°SWSW
225°SWSW
225°SWSW
185°SS
225°SWSW
225°SWSW
225°SWSW
225°SWSW
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.4
0.4
0.5
0.5
0.6
0.6
0.5
0.5
0.5
0.5
0.5
0.5
0.4
0.4
0.5
0.5
0.6
8
8
8
8
7
8
9
9
10
10
10
11
11
11
12
12
12
12
12
12
13
13
13
12
110
120
120
120
110
120
140
160
180
210
240
250
270
270
260
270
260
260
250
250
260
270
290
310
2.0
1.4
1.3
1.8
2.8
4.0
5.1
5.8
5.9
5.4
4.4
3.2
2.1
1.3
1.0
1.3
2.2
3.5
4.7
5.6
5.9
5.5
4.7
3.6
1254
1254
1254
1254
1254
1254
1253
1253
1253
1253
1253
1253
1253
1253
1253
1253
1254
1254
1254
1355
1355
1355
1355
1355
0
0
0
50
45
55
55
70
70
70
55
80
75
70
70
50
30
35
30
40
35
65
60
95
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
10
10
10
10
10
10
10
10
10
10
10
15
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
>20
1022
1022
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024
1024
1023
1023
1022
1022
1022
1022
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
5
5
5
4
3
1
1
0
1456
1356
1355
1254
1254
1253
1253
1253
1253
1253
1253
1253
1355
1356
1457
1458
1559
1560
1660
1660
1559
1559
1558
1457
1050
1050
1050
1050
1049
1049
949
949
949
949
949
1049
1152
1355
1458
1660
1865
1967
1966
1763
1661
1660
1458
1355
12224614
11214613
11204612
11204612
11204612
10193512
10193512
11204612
10183511
10183511
9173511
9163410
815349
9163410
9173511
815349
814349
815349
814349
9163410
9163410
9163410
814349
612337
1.1
1.1
1
1
1
1
1
1
1
1.1
1.2
1.2
1.3
1.3
1.3
1.2
1.2
1.2
1.2
1.1
1.2
1.2
1.2
1.3
Forecasts established for the approach to the port, up to 1 mile from the coast, in local time CaptionGlossary
Expert opinion
A southwesterly, strong and very variable flow prevails over the whole area.
For Saint-Nazaire : No gale warning.
We are 85% sure of the situation, because the high pressure system could move in more quickly than forecast.
In the evening, clear skies. WSW wind force 4. Gusts reaching 16 knots in the evening. Smooth to slight sea. Low, fairly long swell from SW. Good visibility.
semaphore stations
Station St Nazaire-Montoir located 6 km from Saint-Nazaire
* +33 1 77 86 86 86: short number of forecasts for France accessible from France - €2.99 per call** 0899 70 12 34: number of forecasts for France and the World accessible from France - €2.99 per call