...they are calling for thunderstorms...
Could you explain the meaning of this sentence to me? Is it about the forecast or about their desire?

I hear they're calling for thunderstorms all weekend.

Question

...they are calling for thunderstorms...
Could you explain the meaning of this sentence to me? Is it about the forecast or about their desire?

I hear they're calling for thunderstorms all weekend.

Answer

Very common.  See #6:

https://idioms.thefreedictionary.com/call+for

Answer

Hi, I don't think any English native speaker would say "they are calling for thunderstorms" this is not an English expression!  where did you hear this?  Could you have misheard?

Answer

It's about the forecast. "They are calling for" is a common expression for talking about the upcoming weather. "They" refers to the weather forecasters.

Example: I need to get some supplies because they're calling for a lot of snow next Monday.

Answer

If I were to restate the sentence as "They are forecasting for thunderstorms", the potential ambiguity would be removed, ie calling for is to say, to forecast

Answer

Something big is going to happen

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