US Winds Aloft Forecast for Drop Zones from National Weather Service data
courtesy of the Parks College Parachute Research Group,
written by Gary Peek,

Winds aloft data changes only four times per day.
There is no need to check winds aloft more often than that.


Please do not call this program from a script,
cause it to be displayed by an automatic
page refresh, or embed it in another web page.

Based on data from 2018Z, valid from 2100Z, for use from 2000-0300Z (UTC)
Currently 05/20/2018 at 2124Z (UTC), 05/20/2018 at 1624 EST

***Reporting Station: SACReporting Station: SFO
12000<5 Knots
<6 MPH
-2 C
28.4 F
7 Knots
8.0 MPH
-3 C
26.6 F
9000<5 Knots
<6 MPH
4 C
39.2 F
12 Knots
13.8 MPH
4 C
39.2 F
6000<5 Knots
<6 MPH
10 C
50.0 F
15 Knots
17.2 MPH
10 C
50.0 F
3000 8 Knots
9.2 MPH
20 Knots
23.0 MPH

log file