WALLOPS ISLAND, Va.- For the first time in 30 years, NASA is revamping how it looks at snow storms. On Tuesday, the agency unveiled its IMPACTS mission--a snowstorm chasing field campaign along the East Coast. NASA will be using two specialized aircraft to investigate each storm: the ER-2 high-altitude aircraft and the NASA P-3 aircraft. The latter will be housed at Wallops Island. "Studying east coast snowstorms is a big forecasting challenge so that was the challenge that was put forth in front of us," says Dr. Lynn McMurdie, a University of Washington research Associate Professor. "Another thing that's challenging is forecasting the distribution of snow, where is it going to snow heavily, where is it going to not snow as heavily.  In each individual storm it varies from storm to storm."