The U.S. Open's signature cocktail takes millions of honeydew melon balls to keep pouring through the tournament, and every one of them is at the mercy of the weather. High heat during the growing season is critical to the drink's flavor profile. On the flip side, extreme or erratic weather swings can disrupt crop timing and create serious logistical problems when more than 2.4 million melon balls have to be scooped and ready precisely for the tournament in Flushing Meadows, Queens.