Eli5: Why do weather forecasts differ so much from one site to another?

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Its 11:30am and I wanted to check the forecast for this afternoon. One site says it’ll be a 45% chance of rain starting at 5pm, and another site says it’ll be clear until 8pm. How can it be so different when it’s only a few hours away?

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Anonymous 0 Comments

Depends where the site is getting its info, whether any of it is human generated/interpreted/processed, how old it is, what model(s) they use, etc. There’s a ton of variables that go into producing a forecast.

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