We keep giving advice and hopefully, people new to Whitney will listen and heed.
http://www.fs.usda.gov/recarea/inyo/recarea/?recid=20806"Snow level is approximately 9,000-10,000 feet. Crampons and ice axes recommended for travel on steep snow covered slopes."
"April through June: Snowpack is receding. Winter mountaineering equipment and skills are necessary for safe travel."