The third volume of weather icons has paid special attention to convective cloud elements, with anvil/cumulonimbus effects added for convective and thunderstorm icons across a variety of different variations, from general thunderstorm icons, to lightning-less convective cloud effects and rain, snow, or mix effects.
There's a total of 24 precipitation icons across two variations; one variation has a slight background darkening effect to help icon effects stand out on brighter images, while the other doesn't have the darkening element. Thus, there's 48 precipitation icons. There's also 6 non-precipitation icons, including some different partly sunny/cloudy icons. You'll find some moon variations for a few different stages. In total, you get 64 icons in the current version.
Icons are all high, 2000x2000 pixel resolution. The 64 currently included icons are in .PNG format, with .PSDs included for total control in Photoshop.