Day before Yesterday’s RASP
How accurate is the RASP? I contend that it is extremely accurate most of the time. After someone has a good flight (and they post it on the Forum), it easy to compare forecast conditions to what was really out there.
Evaluate the RASP for yourself by comparing the forecast to what was actually achieved. You will soon be rewarded, by having “extremely good luck” finding lift every time you take a tow. If you look at the RASP before you launch, you will know where the lift is located, the strength of the lift and how high you should climb in most thermals.
Every flight taken is weather reconnaissance! It used to be …. “you won’t know unless you tow”, as well as other popular phrases (often stated by the FBO or tow pilot) such as: “You’ll never know what’s up there, if you don’t take a tow,” but those days are in the past. By comparing what actually happened on a given flight with what was forecasted by the latest RASP for that same period of time, you will learn to use the RASP to its fullest extent. If pilots provide their recorded flight log to other pilots (by posting the flight on to the Forum), analysis can be done by anyone interested in improving their skills in reading the RASP.
Routinely, each RASP page is replaced by a more current run of the model. Andy places the outdated products in a temp directory. This table provides you the link to each one of those previous forecasts (which are now history, but valuable for validating the forecasts).
Thanks Andy H. for helping the pilots to enjoy soaring at WSC.
Page revised 11/20/2017