SKY CONDITION - missing "VV" type

[Vipersf]

Currently there are four types of clouds being considered in the code: export type MetarCloudCode = "FEW" | "SCT" | "BKN" | "OVC"

However, as per Weather.gov, a fifth type exists being "VV":

"Cloud amount and height: CLR (no clouds detected below 12000 feet); FEW (few); SCT (scattered); BKN (broken); OVC (overcast); followed by 3-digit height in hundreds of feet; or vertical visibility (VV) followed by height for indefinite ceiling."

For obvious reasons, CLR is not considered relevant; yet the VV one (being rather closely linked to OVC) is.

Do I understand correctly that this is currently not implemented? If so, would it be possible to implement this?