1.   The weather was overcast, with heavy low clouds.

2.   The weather was heavily overcast with the threat of rain.

3.   There was no information on what caused the crash, but the weather was reportedly overcast en route from Kandahar.

4.   The weather was overcast but rain was not forecast.

5.   The weather was overcast, but rain was not expected.

6.   The weather was overcast, with occasional drizzle.