[SOLVED] Have synopsis, need help identifying book title please

Kids or younger reader book. Fantasy genre.

In this book world weather can be controlled by sorcerers, and especially powerful sorcerers can summon dragons. When the sorcerers die the dragons vanish, except in the case of the most powerful sorcerers where their dragon is buried with them. The villain wanted the scales of the blue dragon that belonged to a sorcerer. There were also weather spells that were too destructive and were trapped, including the scarlet snow that made people fall asleep. The villain was holding the main character's parents hostage. The main character can summon a dragon. The main character is going to school to become a meteorologist

Other key words that may or may not be the same story -- Yeti, ball lightning, jar, lab, gardening supply shop