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In 1806, the admiral Francis Beaufort publishes a scale to express the strength of the wind. In 1874 this scale was adopted by the International Metheorological Committee.
BEAUFORT SCALE
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|---|---|---|---|---|
|
DEGREE
|
mts/sec
|
Knots
|
Km/h
|
DEFINITION
|
|
0
|
0 - 0,2
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0 - 1
|
0 - 2
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Calm
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1
|
0,3 - 1,5
|
1 - 3
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2 - 6
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Light air
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2
|
1,6 - 1,3
|
4 - 6
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7 - 11
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Light breeze
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3
|
3,4 - 5,4
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7 - 10
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12- 29
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Gentle breeze
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4
|
5,5 -7,9
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11 -16
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20 - 29
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Moderate breeze
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5
|
8,0 - 10,7
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17 - 21
|
30 - 39
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Fresh breeze
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6
|
10,8 - 13,8
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22 - 27
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40 - 50
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Strong breeze
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7
|
13,9 - 17,1
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28 - 33
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51 - 61
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Near gale
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8
|
17,2 - 20,7
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34 - 40
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62 - 74
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Gale
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9
|
20,8 - 24,4
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41 - 47
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75 - 87
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Strong gale
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10
|
24,5 - 28,4
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48 - 55
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88 - 101
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Storm
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11
|
28,5 - 32,6
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56 - 63
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102 - 117
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Violent storm
|
|
12
|
32,7 +
|
64 +
|
118 +
|
Hurricane
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In 1949 another 5 degrees, up to force 17, are added in order to express the different types of Hurricanes. These receive different names depending on the region where they happen. So, in Central and North America we talk about Hurricanes, in the asiatic coasts of the Pacific Ocean they are called Typhoon, in Australia Willy Willies. In the United States the inland Tornadoes can blow at more than 350 km. per hour. | ||||
Click on the button below to see the normalized symbolism about wind strength and direction.
| First, type the number you wish converted here: Then, click radio buttons for desired conversion: | |||||||||||||||
| Fm: | cm /
sec |
m
/ sec |
m /
min |
km / hr |
ft / sec |
ft / min |
mi / hr |
Knots |
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| To: | cm / sec |
m / sec |
m / min |
km / hr |
ft / sec |
ft / min |
mi / hr |
Knots |
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|
- The unit mi/hour refers to terrestrial miles. - Be aware that there are two types of miles:
- Else, 1 Knot = 1 marine mile per hour or 1,852 kmts/h. - Finally, the "League" -old measure of distance- is equivalent to 3 marine miles. |
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The vice-admiral Sir Percy Douglas, created a scale to express the sea conditions in 1917, when he was responsible for the Metheorological Navy Service.
DOUGLAS SCALE
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|---|---|---|
|
DEGREE
|
Height of waves
|
DEFINITION
|
|
0
|
No waves
|
Calm sea
|
|
1
|
1 - 10 cm.
|
Rippled sea
|
|
2
|
10 - 50 cm.
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Smooth sea
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|
3
|
0,5 - 1,25 m.
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Slight sea
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4
|
1,25 - 2,5 m.
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Moderate sea
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|
5
|
2,5 - 4 m.
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Rough sea
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6
|
4 - 6 m.
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Very rough sea
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|
7
|
6 - 9 m.
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High sea
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8
|
9 - 14 m.
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Very high sea
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|
9
|
14 m. +
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Phenomenal sea
|
AVERAGE SEA WATER TEMPERATURE IN THE NORTHERN COSTA BRAVA
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Depth |
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
Surface |
12.6 |
12.4 |
12.4 |
13.4 |
15.5 |
18.9 |
21.6 |
22.8 |
21.2 |
18.5 |
16.2 |
13.8 |
At 20 m. |
12.8 |
12.5 |
12.5 |
13.0 |
14.5 |
17.2 |
19.4 |
20.8 |
20.1 |
18.2 |
16.2 |
14.0 |
At 40 m. |
12.9 |
12.6 |
12.5 |
12.8 |
13.7 |
14.5 |
14.5 |
14.9 |
15.9 |
17.0 |
16.0 |
14.0 |
| MONTHLY TEMPERATURES IN THE NORTHERN COSTA BRAVA | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
|
Medium |
9.95 |
9.90 |
12.35 |
13.65 |
17.75 |
20.95 |
24.00 |
24.05 |
21.30 |
17.05 |
11.65 |
9.75 |
Max. |
13.85 |
14.20 |
16.20 |
17.90 |
21.15 |
24.50 |
27.50 |
27.50 |
25.05 |
21.05 |
15.85 |
13.85 |
Min. |
6.10 |
5.55 |
8.50 |
9.45 |
14.30 |
17.40 |
20.50 |
20.55 |
17.50 |
13.15 |
7.50 |
5.70 |
| AVERAGE MONTHLY PRECIPITATION IN THE NORTHERN COSTA BRAVA | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
ENE |
FEB |
MAR |
ABR |
MAY |
JUN |
JUL |
AGO |
SEP |
OCT |
NOV |
DIC |
|
Ppt. |
33.45 |
41.75 |
27.00 |
41.55 |
62.70 |
33.10 |
23.00 |
16.70 |
90.45 |
43.65 |
28.85 |
27.80 |
The unit of precipitance used in this table is expressed in millimeters and is equivalent to liters per square meter.
Here you can take a look at the forecast according to the prevision of the Department de Medi Ambient de la Generalitat de Catalonia.
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| Images from the Meteosat: | |
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Numerical Model at 500 m.
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