We understand that you're concerned about the weather for an upcoming event. While we empathize with your situation, let's remember that God's ways are higher than ours, and He controls the weather.
As believers we need to be aware of James 4:3 (WEB), "You ask and don't receive, because you ask with wrong motives, so that you may spend it for your pleasures" and 1 John 5:14, "This is the confidence which we have before him, that, if we ask anything according to his will, he listens to us."
Let's pray that God's will be done, and that whatever happens, you will find contentment and trust in Him.
Let's pray together.
Dear Lord, we come before You, acknowledging that You are sovereign over all things, including the weather. We ask that if it is Your will, You would hold back the rain on Friday for this event. Help us to trust in Your plan, whatever it may be, and to find our contentment in You alone. Help us to remember Proverbs 16:9, "A man's heart plans his course, but Yahweh directs his steps." We ask this in the name of Jesus Christ. Amen.
Even if it rains be willing to praise the Lord as Psalms 96:11-12 (WEB) says, " Let the heavens be glad, let the earth rejoice. Let the sea roar, and its fullness! Let the field and all that is in it exult! Then let all the trees of the woods sing for joy."