ACROSS
4. The flashes of light that are produced in the sky during a storm →
    Lightning
5. A small, soft piece of frozen water that falls from the sky as snow →
    Snowflake
6. A long period of time during which there is very little or no rain →
    Drought
7. A severe snowstorm that goes on for a long time →
  Blizzard
8. An extremely large, powerful, and destructive storm with very strong winds that occurs especially in the western part of the Atlantic Ocean →
  Hurricane


DOWN
1. Covered with clouds, covered with clouds →
    Overcast
2. A stream of liquid in the form of very small drops, a fine spray →
  Mist
3. A storm with a large amount of falling snow →
  Snowstorm
7. A gentle wind →
  Breeze