A storm bearing down on the East Coast with a messy mix of snow, rain and wind is threatening to ground giant balloon versions of Snoopy and SpongeBob SquarePants in the annual Macy's Thanksgiving Day Parade.
The iconic characters that soar between the Manhattan skyscrapers every year may not lift off Thursday if sustained winds exceed 23 mph and gusts exceed 34 mph, according to city rules enacted after fierce winds in 1997 caused a Cat in the Hat balloon to topple a light pole and seriously injure a woman spectator.
Current forecasts call for sustained winds of 20 mph and gusts of 36 mph.
(Read more: Thanksgiving weather: Storms fail to collide)
"At this time, it is too early to make any determinations on the flight of the giant balloons," said Macy's spokesman Orlando Veras. "On Thanksgiving morning, Macy's works closely with the NYPD, who, based on real time weather data and the official regulations, determine if the balloons will fly and at what heights."