Let’s face it — weather often plays a big role in movies. Without the tornado in “The Wizard of Oz,” Dorothy never would have left Kansas. And take away the nor’easter in “The Perfect Storm” and … well, there would have been no movie.

So without further ado, here is the definitive list of the 10 best weather scenes in movie history:

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10. The T-rex attack in “Jurassic Park” (1993)

As if being attacked by a bloodthirsty monster isn’t bad enough, there’s the mud. So. Much. Mud.

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In this scene from the classic Spielberg movie, all that slop makes it hard to escape the oncoming dinosaur. But of course they do. Funny, the T-rex doesn’t seem to mind the rain.

9. Andy’s escape in “Shawshank Redemption” (1994)

Why set up a bunch of fancy Hollywood lighting when you can have Mother Nature do the work for you?

In this beautiful scene from the 1994 classic, it’s a cleansing rain that accompanies Andy’s escape from prison, and a flash of lightning to highlight his pure exuberance. Without the rain — or the bolt from above — it just wouldn’t be as powerful … or symbolic.

8. The final scene in “The Shining” (1980)

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In this terrifying scene, if the elements don’t kill you, Jack Nicholson with an ax will. At night. In whiteout conditions.

Here we learn it’s always helpful to have a snow machine available to make your escape.

7. A blizzard snarls traffic in “Groundhog Day” (1993)

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As a weather junkie, I just had to pick this. When Bill Murray said, “I make the weather,” it became a classic for weather gangs everywhere.

6. The dance sequence in “Singin’ in the Rain” (1952)

There’s rain that’s an annoyance. Rain that ruins your outdoor plans. Rain that floods your basement. And then there’s rain that’s just pure romance. As a weather junkie, I appreciate that last kind.

5. The super freeze in “Day After Tomorrow” (2004)

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Meteorologically impossible, but visually stunning, when all of New York City instantly freezes in this scene, it’s hard not to feel the chill of the world ending. Makes Snowzilla seem like flurries.

4. That time it rained frogs in “Magnolia” (1999)

For a film set in L.A., there’s a LOT of precipitation in “Magnolia.” And the one form of precipitation that gets everyone talking is of the plague variety. A reference to Exodus 8:2 or just “something that happens,” it’s the ultimate weather phenomenon.

3. The lightning strike in “Back to the Future”

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It’s hard to overestimate the importance of what happened at exactly 10:04 p.m. on Nov. 12, 1955. How else would Marty and Doc have been able to generate the 1.21 gigawatts of power necessary to operate the flux capacitor? How else would Marty have made his way back to 1985? And how else would we have had “Back to the Future II” and “Back to the Future III”?

2. The monster tornado in “Twister” (1996)

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Out of all the twisters in this weather horror movie, this is really the craziest. Any tornado that can lift up a semi- full of flammable gas and slam it into a pickup truck gets my vote. And that fact that Bill Paxton and Helen Hunt survive this onslaught? Well, only in Hollywood.

1. “It’s a Wonderful Life” (1946) final scene

When George Bailey yells “Merry Christmas” to the entire town of Bedford Falls, N.Y., it’s against a snow-white backdrop that only Hollywood could create. This scene became the standard-bearer for all winter wonderlands to come. And to think, this was all created using 3,000 tons of shaved ice.