Weather Class
July 7, 2009 6:11 AMFalling speed is based on size:
5mm = 9 m/s = 20 mph, 0.5mm = 2 m/s = 4.5 mph, Snow = 3.1 mph
Typical fall speeds:
|
|
diameter: mm |
fallspeed: m/s |
|
|
0.001 |
0.0003 |
|
|
0.01 |
0.03 |
|
|
0.1 |
0.27 |
|
|
0.2 (cloud) |
0.72 |
|
|
0.3 (cloud) |
1.2 |
|
|
0.8 (drizzle) |
3.3 |
|
|
0.9 (drizzle) |
3.7 |
|
|
1.8 (rain) |
6.1 |
|
|
2.2 (rain) |
6.9 |
|
|
3.2 (drop breaks up) |
8.3 |
|
|
5.8 (ditto) |
9.2 |
Hail = 40 m/s (90 mph)
I should probably use the scale to factor speed.
http://www-das.uwyo.edu/~geerts/cwx/notes/chap09/hydrometeor.html
mps to mph
(value * 3600)/1610.3
(10 * 3600)/1610.3 = 22.356
Categorised in: Math