In pits around the country, racers have been trading in their bulky and expensive weather stations for a portable Kestrel 4250 Racing Weather Tracker. With water grains, air density, absolute pressure, and density altitude, the 4250 arms racers with the accurate weather data they need to make those last minute dial-in or tuning decisions. Knowing how weather influences the way a car drives is the first step to optimizing performance. And with the Kestrel 4250’s automatic and manual data storage, racers can easily keep an electronic weather data log of race day. The Kestrel Interface and Communicator software makes long-term storage, in-depth analysis and detailed charting of stored data a breeze.