Acts 1:9-11 KJVS
“And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.  And while they looked stedfastly toward heaven as he went up, behold, two men stood by them in white apparel;  Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.”
40 days after Jesus Christ died and resurrected, He was taken up (lifted up) and a Cloud received Him.
I do not believe this was a Cloud as in literal Cloud in the sky, I believe that it was the Angelic Host.
See Ew Bullingers notes on verse 9 of Acts Chapter 1, in your Companions Bible on page 1576.
This Angelic Host are the Zadok, or you can say the Elect that were in Heaven at the time of Christ ascension to the Father after His service for the world ( John 3:16) was fulfilled.
They are the Cloud of Witnesses spoken about in Hebrews Chapter 12.
Hebrews 12:1 KJVS
“Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us,”
This Cloud of Witnesses, which are those, who are many that held the Testimony of our Heavenly Father in each of their appointed lifetimes, throughout this World age who have died and gone back to our Heavenly Father. A Remnant brought forth in each of their appointed generations, to pass the Truth of God’s Word down to the final Remnant, and others who will be here to serve throughout this final generation, and especially during the Five Month Long Hour of Temptation.
Let’s go to Hebrews Chapter 1.
Hebrews 1:1 KJVS
“God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,”
Spake unto the Fathers who are Elect by the Prophets ,who are also Elect.
Hebrews 1:2 KJVS
“Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;”
Spake unto us (not to say I) but the final Remnant from the 7000 that will be here (also others) during these last days which will lead up to and will be during the Five Month Long Hour of Temptation.
From Jesus who is the Living Word through the Prophets, and Fathers down to the Final Remnant, and others who will serve during that Five Month Long Hour of Temptation which is the Tribulation of Satan that will come upon the World at the Woe of the Fifth Trump, and will end at the Woe of the Seventh Trump, when many will die spiritually at the Woe that is in the middle, the Woe of the Sixth Trump.
Hebrews 1:3 KJVS
“Who being the brightness of his glory, and the express image of his person, and upholding all things by the word of his power, when he had by himself purged our sins, sat down on the right hand of the Majesty on high;”
Going back to Acts Chapter 1, if I may, we see 40 days after Jesus Christ passion upon the Cross, that gave us the opportunity to be purged of our sins, sat down on the right hand of the Majesty on High, our Heavenly Father.
We see this in Daniel Chapter 7 verse 13 .
Daniel 7:13 KJVS
“I saw in the night visions, and, behold, one like the Son of man came with the clouds of heaven, and came to the Ancient of days, and they brought him near before him.”
And we see the Son of Man, came with those Clouds after He was received of them, to the Ancient of Days to sit down at His right hand, until His enemies are made His footstool. (Psalms 110.)
Continuing in Hebrews Chapter 1.
Hebrews 1:4-7 KJVS
“Being made so much better than the angels, as he hath by inheritance obtained a more excellent name than they.  For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?  And again, when he bringeth in the firstbegotten into the world, he saith, And let all the angels of God worship him.  And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire.”
Yes, these Angels worship Jesus Christ, and they are His ministers a flame of Fire, in which that Fire is the Holy Spirit.
See these Clouds are not literal rain Clouds that we see in the sky (even though they have the Living Water within them :), they are His Angels which are most of the 7,000 who are not on earth during their appointed service, in their appointed generations.
They are the Clouds that in a like manner in which received Christ in the ascension to our Heavenly Father, that will come back with Jesus Christ at the Seventh Trump.
We see this here in Revalation Chapter 19.
Revelation 19:11-14 KJVS
And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.  His eyes were as a flame of fire, and on his head were many crowns; and he had a name written, that no man knew, but he himself.  And he was clothed with a vesture dipped in blood: and his name is called The Word of God.  And the armies which were in heaven followed him upon white horses, clothed in fine linen, white and clean.
The Armies, which were in Heaven, are the Clouds, and they will be upon Horses (Vehicles) and will follow Jesus Christ upon His return at the Seventh Trump.
We also see His return spoken about here in Mark Chapter 13
Mark 13:24-27 KJVS
“But in those days, after that tribulation, the sun shall be darkened, and the moon shall not give her light,  And the stars of heaven shall fall, and the powers that are in heaven shall be shaken.  And then shall they see the Son of man coming in the clouds with great power and glory.  And then shall he send his angels, and shall gather together his elect from the four winds, from the uttermost part of the earth to the uttermost part of heaven.”
You see the Son of Man who is Jesus Christ coming in the Clouds there in verse 26?
In verse 27 it says that He will send His Angels (the Great company of Witnesses that come back with Him), to gather His Elect from the Four Winds ( Five Month Long Hour of Temptation) which are the Final Remnant (232) of the 7,000 that are the Church of Philadelphia who are Alive and Remaining to be gathered. (1st Thessalonians Chapter 4.) They will meet Christ in the air, which is to say Spirit, and will be taken to the Millennial Temple, where only they with the rest of the 7,000 Elect, which come with Christ, can approach Christ during the 1000 years (Day of the Lord.) Ezekiel Chapter 44: 15-16).
I also believe, the Elect being gathered from the Four Winds( Five Month Long Hour of Temptation) will include the 144,000 and whomsoever will with freewill that come out of Satan’s confusion in the space of repentance before the Seventh Trump. In essence they will become Elect which is to say set aside for service during the Millennium at the Millennial Gates and will not be able to approach Jesus Christ during the 1000 years which is the Day of the Lord. (Ezekiel Chapter 44: 10 through 14,) until their service at the Gates are fulfilled throughout that Day.
However, every eye will see Christ when He returns at the Seventh Trump.
Revelation 1:7 KJVS
“Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.”
So, you see these Clouds are a Great Cloud of Witnesses.
Again referred to in Hebrews Chapter 12 .
Hebrews 12:1-2 KJVS
“Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us,  Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.”
And you can see them spoken about in the previous Chapter, Hebrews Chapter 11
A very interesting read indeed.
They are the Ministering Spirits brought through in the Flesh in each of their appointed lifetimes, to return and continue their ministering throughout the Lords Day, with the fellow Elect in which they will gather from the Four Winds, and from the uttermost part of the earth.
These are the Clouds, and they will return with Jesus Christ. They were there at His ascension; they will return with Him when He descends with a Shout! At the Woe of the Seventh Trump.
The End .