Forecast condition strings

In Tempest API there is a list of forecast condition strings, which I think is not perfect. If I asking a forecast, the json code has a condition “Snow likely” and it is not in the forecast api conditions list. So is there a list where I found all conditions. It is not easy to put icons in my project, if there are conditions for which it is not possible to prepare.

I think it should be treated the same as “rain likely” and “rain possible”. For snow the options are “snow” and “snow possible”. I think someone just left out the word “likely” for the snow.

I am just adding some detail to help understand the issue.
My guess is that @sunny may be correct.
This link
https://weatherflow.github.io/Tempest/api/swagger/#!/forecast/getBetterForecast
points to this list: Implementation Notes

The better forecast includes current conditions, daily forecast and hourly forecast.

Possible Condition Strings:
Clear
Rain Likely
Rain Possible
Snow
Snow Possible
Wintry Mix Likely
Wintry Mix Possible
Thunderstorms Likely
Thunderstorms Possible
Windy
Foggy
Cloudy
Partly Cloudy
Very Light Rain

Possible Icon Values:
clear-day
clear-night
cloudy
foggy
partly-cloudy-day
partly-cloudy-night
possibly-rainy-day
possibly-rainy-night
possibly-sleet-day
possibly-sleet-night
possibly-snow-day
possibly-snow-night
possibly-thunderstorm-day
possibly-thunderstorm-night
rainy
sleet
snow
thunderstorm
windy

just out of curiosity… they have icons with 3 drops of rain and icons with 6 drops of rain, which one belongs to which description?