細かな (alternative attributive)

The な-form 細かな as an alternative attributive of the i-adjective 細かい ('fine, small, detailed'). Both 細かい雪 and 細かな雪 are grammatical; 細かな carries a softer, slightly more refined or written feel. A small set of i-adjectives admits both forms (細かな/細かい, 暖かな/暖かい).