Apex domains cannot have CNAME records.
Question and response
Question
dig comaccuweather.com. NS
Answer
comaccuweather.com. 5 NS ns-1340.awsdns-39.org.
comaccuweather.com. 5 NS ns-1835.awsdns-37.co.uk.
comaccuweather.com. 5 NS ns-306.awsdns-38.com.
comaccuweather.com. 5 NS ns-339.awsdns-42.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0