Forecast time: 09/17/2007 21 (UTC)

Model: RUC

Parameter: Thermal Updraft Velocity

Note that the thermal updraft velocity is forecasted to be between 600 and 800 feet per minute. Subtract the sink rate of your glider (somewhere around 250 fpm) to arrive at 350 to 550 fpm average thermal strengths for the area. This is an average of the general thermal velocity. There will likely be much stronger lift and of course much lighter lift in the area as well.