Hard Rain Recording
  A heavy downpour produces more noise than any other typer of rain. Both the sound of raindrops hitting the surface and the bubbles they form are very loud across a wide specturm of frequencies. (Image by Robert Simmon, NASA GSFC. Recording from Jeffrey A. Nystuen, University of Washington Applied Physics Laboratory)

large drop animation (3.5MB)

large drop recording
hard rain recording
drizzle recording