The Allied attack on Normandy was almost cancelled due to bad weather. However, Eisenhower finally agreed to let it happen. Although the weather did have some effect, the Germans weren't as prepared because they thought that surely no attack would come that day.

This is what most people would say if they read this question:

The difference is that they are both the same so there is no difference because the bad weather and bad weather are both the same things anyways.

but that is totally wrong because a bad weather and bad weather are not the same

a bad weather is one but bad weather can be more than one . And also a bad weather has a in front of it and bad weather doesn't

So from my discrimination it could be 60% right.

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We would get bad weather

Phrases for bad weather: foul or rotten weather, or poor conditions if it's not so bad.

Bad weather happens because if the weather channel says that there is going to be bad weather in a certain area, it means that that area is going to have low pressure, which causes bad weather.