Here's the site I use.
http://www.met.utah.edu/cgi-bin/droman/ ... y=n&type=0Scroll down to Summit County. The indicators I look at are Canyons-Condor, Park City-Jupi, and in Wasatch County, DV-Mount Baldy. They're all showing a decent west northwest breeze. Silver Creek in Summit County is the closest meter and if the whole area is blowing northwest it will be similar at Home Depot. Sometimes a south coming up from Heber Valley will cancel out the northwest at Home Depot. That is the only time Silver Creek won't be accurate.
What I've seen on days like today when the winds aloft aren't really strong, (or the day after a good northwest) it will be calm in the morning then in the afternoon the winds will dip down to this elevation for a couple hours. Usually one to three o'clock.
As a general rule, the stronger the system, the later in the afternoon it will last. After work sessions can be tough.