OpenWeatherMap condition missing for one day

Does anyone have some weather condition icon(s) not show up for openweathermap?
In my case, according to the forecast, it’s supposed to be rainy on March 18-19. Those are the that icons aren’t showing.

If someone knows how to gather more information to debug/resolve this, I’d like to think I’m reasonably capable to help dig into it. My assumption is that it is unmapped/missing condition code that should be here:

but what is the most direct way to capture that unmapped code?

Sorry, couldn’t resist.
If it were me, I would eliminate all the bad weather and only display warm, pleasant days. :wink: