When Harry and Sirius were attacked by Dementors by the lake, the wind rose first, then the temperature plummeted.
Even where ghosts and monsters roamed, the rules of "physics" still applied. When cold air swept in, warm air rose, the cold air filled the space, and thus the wind formed.
"Merlin's beard, look who I've run into."
A booming voice spoke. Flitwick, who had been chatting, looked over, and the smile on his face froze in an instant.
"What a rare sight, Filius. You actually left the school," the newcomer said.
"I often run into you at gatherings, Wimple. How could I run into you if I never left the school?" Flitwick said.
"You must be Professor Sprout." Wimple vigorously shook Pomona's hand. "Pleased to meet you."
They had indeed met before, but this was the first time they had exchanged greetings. Pomona smiled politely as well. "The pleasure is mine, Mr. Wimple."
"What have we missed?" Amos Diggory asked. Cedric, who had just been "rescued," stood beside him.
"This is Gilbert Wimple of the Experimental Charms Committee," Pomona introduced.
"And you are?" Wimple asked, looking at Cedric.
"This is my son, Cedric," Amos Diggory said proudly.
Wimple quickly lost interest in Cedric, who was wearing Hufflepuff robes, and turned his attention back to the head of Ravenclaw.
"I'm waiting for your signature, Filius."
Flitwick said nothing.
"Signature for what?" asked the playwright from Broadway, America.
"Regulations on weather charms. Abusing them can affect the weather," Gilbert said.
"How many days does Britain ever go without rain?" Flitwick said sarcastically. "Will daylight last longer if atmospheric charms aren't used?"
"I heard that a student was injured alongside Harry Potter during this year's Quidditch match," Gilbert said. "There was wind and rain that day, thunder and lightning."
"That person was me,