Final answer:
The presence of ice pellets at the surface usually indicates that a cold front is passing through the area. Ice pellets, also known as sleet, are small ice pellets that form when raindrops freeze into ice as they fall through a layer of freezing air near the surface.
Step-by-step explanation:
The presence of ice pellets at the surface usually indicates that a cold front is passing through the area. Ice pellets, also known as sleet, are small ice pellets that form when raindrops freeze into ice as they fall through a layer of freezing air near the surface. This typically occurs during winter storms when warm air from a low-pressure system is forced to rise over a layer of cold air near the surface.