For 10 points, name these events depicted in the fourth movement of Beethoven's Pastoral Symphony and the third movement of Vivaldi's "Summer."
The last of Rossini's six quartet sonatas depicts one of these events. In Liszt's Years of Pilgrimage, the piece Au bord d'une source is followed by a piece depicting one of these events. Tchaikovsky's first major orchestral work was an overture named after one of these events. In another work, the trombones, piccolo and timpani enter for the first time during a depiction of one of these events; that depiction transitions smoothly into the next movement, which goes back from (*) F minor to F major. Another work is accompanied by a sonnet detailing a weeping shepherd trembling in anticipation of one of these events. For 10 points, name these events depicted in the fourth movement of Beethoven's Pastoral Symphony and the third movement of Vivaldi's "Summer."
The last of Rossini's six quartet sonatas depicts one of these events.
thunderstorms [or: tempests, rainstorms]