Are there clear passages that actually teach there will be any signs and wonders done by God (and called as such) during the Tribulation period? I can find various references about false signs and wonders done by Satan, false prophets, the Antichrist just prior to Christ's return, but cannot think of any references to them done by God - now, I am referring to passages where those specific terms are used, not where by our reasoning we assume something.

Matthew 24:24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.

Mark 13:22 For false Christs and false prophets shall rise, and shall shew signs and wonders, to seduce, if it were possible, even the elect.

Luke 21:11 And great earthquakes shall be in divers places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven. (Yes, signs from God - but not signs and wonders done by God through people.)

Luke 21:25 And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring; (Same thing - and these are not done on earth.)

2 Thessalonians 2:9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,

Revelation 13:11-14 And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon. And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed. And he doeth great wonders, so that he maketh fire come down from heaven on the earth in the sight of men, And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.