Revelation 11:19

 "And behold, I am coming quickly. 

Blessed is he who heeds the words of the prophecy of this book."     

Revelation 22:7  NASB

Then God's temple in heaven was opened, and within his temple was seen the ark of his covenant. And there came flashes of lightning, rumblings, peals of thunder, an earthquake and a severe hailstorm.

Then God's temple in heaven was opened 
Revelation 15:5  After this I looked, and I saw in heaven the temple--that is, the tabernacle of the covenant law--and it was opened.
Revelation 15:8  And the temple was filled with smoke from the glory of God and from his power, and no one could enter the temple until the seven plagues of the seven angels were completed. 

and within his temple was seen the ark of his covenant 
Exodus 25:10-11  "Have them make an ark of acacia wood--two and a half cubits long (45 inches or 1.1 m), a cubit and a half wide (27 inches or 68 cm), and a cubit and a half high. Overlay it with pure gold, both inside and out, and make a gold molding around it."
Exodus 25:21-22  "Place the cover on top of the ark and put in the ark the tablets of the covenant law that I will give you. There, above the cover between the two cherubim that are over the ark of the covenant law, I will meet with you and give you all my commands for the Israelites." 
2 Chronicles 5:7  The priests then brought the ark of the LORD's covenant to its place in the inner sanctuary of the temple, the Most Holy Place, and put it beneath the wings of the cherubim.
Hebrews 9:3-5  Behind the second curtain was a room called the Most Holy Place, which had the golden altar of incense and the gold-covered ark of the covenant. This ark contained the gold jar of manna, Aaron's staff that had budded, and the stone tablets of the covenant. Above the ark were the cherubim of the Glory, overshadowing the atonement cover. But we cannot discuss these things in detail now.

And there came flashes of lightning, rumblings, peals of thunder 
Revelation 4:5  From the throne came flashes of lightning, rumblings and peals of thunder. In front of the throne, seven lamps were blazing. These are the seven spirits of God.

an earthquake and a severe hailstorm 
Revelation 16:21  From the sky huge hailstones, each weighing about a hundred pounds, fell on people. And they cursed God, on account of the plague of hail, because the plague was so terrible.

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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