Here's what I found out about why snow doesn't accumulate near the lines and numbers on the football field
https://www.quora.com/How-do-the-lines-on-the-football-field-stay-snow-free
Keeping the lines on a football field snow-free typically involves a combination of techniques and equipment. Here are some common methods:
Field Heating Systems: Many professional and college football fields are equipped with heating systems beneath the turf. These systems can warm the ground and help prevent snow from accumulating on the field.
Snow Removal Equipment: Grounds crews often use specialized snow removal equipment, such as snow plows or blowers, to clear the lines and the field quickly after a snowfall.
Field Paint: The paint used for marking lines can be formulated to resist snow accumulation and can also be more visible against a snowy background.
Maintaining Turf Conditions: Ensuring that the turf is in good condition can help with drainage and reduce snow accumulation. Proper maintenance practices can keep the grass healthy and more resistant to snow.
Regular Monitoring: Grounds crews monitor weather conditions closely and may take preemptive actions, such as applying salt or sand, to prevent snow from sticking to the lines.
These methods help ensure that the lines remain visible and the field is playable, even during winter weather conditions.