Valley of Tiamat timeline

ca 18: The Swords wake up in the same damp and dark cave.
before 19.30: Captain Klir' and his hunting party is spotted north of the red brick road by goliath scouts
ca 20.00: It starts to rain
ca 21.15: It stops raining
ca 21.30: Captain Klir' comes back to the fort with the focus
ca 22.30: The beholder starts making a portal
ca 22.30: The beholder and his army of mutated dragonborn come through the portal at the fort, attack it.
ca 22.40: The beholder and his army has sacked the fort, and move up to the temple.
ca 22 55: A huge cyclone of lightning and energy forms directly above the temple.
ca 22.55: The beholder and his army has taken the courtyard and head into the temple.
ca 23.00: The cyclone ends.
ca 23.10: The beholder and his army (now down to about 100) come out of the temple and head away from the temple.
ca 23.15: Fade out