Low atmospheric pressure generally indicates ________ weather.

Low atmospheric pressure generally indicates poor weather. This is because areas of low pressure are often associated with rising air, which can lead to cloud formation and precipitation. When the air rises, it cools and condenses, creating clouds and storms. Low-pressure systems are typically linked to unsettled weather conditions, including rain, snow, or even severe storms, thus making it a signal for poor weather.

In contrast, high-pressure systems usually indicate fair weather and stability. They allow the atmosphere to be more stable and keep clouds from forming, leading to clearer skies and more favorable conditions. Therefore, the presence of low atmospheric pressure is a key predictor of poor weather situations, making that the correct choice in this case.