Sentence 1: Jessie was in the middle of a long hike. 
 Sentence 3: She had to take cover under a tree trunk 
 Sentence 4:  She waited there for thirty minutes as it rained 
 Sentence 5:  Finally things cleared up and she was able to finish her hike 
 Option 1: Suddenly it started to snow. 
 Option 2: Suddenly it started pouring down rain.