1.   Not all evenings turn out this way, Swarms of flying ants during the day usually predict unstable weather.

2.   As this system remains in our vicinity, we will continue to experience unstable weather conditions over our area.

3.   But the system has stumbled in the last two years due to unstable weather.

4.   Meanwhile, the Observatory said unstable weather would remain until later this week because Hong Kong was still under the influence of a trough of low pressure.

5.   The unstable weather conditions are expected to continue through the day on Tuesday.

6.   Therefore similiar unstable weather is expected during the next few days.

7.   This created unstable local weather due to sufficient moisture at the middle to upper levels of the local atmosphere.

8.   This activity was associated with an almost stationary low pressure trough located over the Atlantic that has been responsible for the unstable weather conditions of the past two days.

9.   Tropical wave across Hispaniola on Thursday morning exiting the region will maintain unstable weather across the local waters through Thursday evening.

10.   Unstable weather and icebergs in the region could pose a serious threat to the ship, said one of the crew on a Greenpeace vessel following the Pacific Pintail.