Velocity of Wind.

Perpendicular

Force on One

Square Foot in Lbs.

Description.

Miles per Hour.

Feet per Minute.

Feet per Second.

1

88

1.47

.005

Hardly perceptible

2

176

2.93

.020

Just perceptible

3

264

4.40

.044

" "

4

352

5.87

.079

Gentle breeze

5

440

7.33

.123

" "

10

880

14.67

.492

Pleasant

15

1,320

22.00

1.107

"

20

1,760

29.30

1.968

Brisk gale

25

2,200

36.60

3.075

" "

30

2,640

44.00

4.428

High wind

35

3,080

51.30

6.027

" "

40

3,520

58.60

7.872

Very high wind

45

3,960

66.00

9.963

" " "

50

4,400

73.30

12.300

Storm

60

5,280

88.00

17.712

Great storm

70

6,160

102.7

24.108

" "

80

7,040

117.3

31.488

Hurricane

100

8,800

146.6

49.200

"