Eli5: If storms need warm air/ to form, how do blizzards form?

Question

Eli5: If storms need warm air/ to form, how do blizzards form?

In: 5

Answer 1

Storms need relatively warm air to form. If you have 0 degree air meeting -10 degree air you have the same relative temperature difference that you have if 30 degree air meets 20 degree air.