Calculating rainfall on a vertical surface

[CladdingNYC]

I'm trying to calculate the volume of rain that would accumulate at the base of a building facade during a driving rain. The example I have in mind is a 50 story office building without setbacks, adjacent to a 1 story building, where the facade overlooking the low building is unprotected by other buildings nearby. I think what I'd need to figure this out is historic data that combines wind data and rain data, and to know at what angle rain falls for a given wind speed.
I'd very much appreciate any thoughts or suggestions. Thanks.

albertoarnoldomora

 

[civilperson]

I remember answering this question in a previous post. The rain amount is the same whether there is wind or no wind. The sheltered side receives less and the windward side receives more, (a balance), the the roof receives the same.
The low building may experience higher quantities of rain when on the windward side. The angle of falling rain is derived from the limiting speed of vertical gravity force vs air drag and the horizontal speed.