1.   Bill Brandau, operations chief on the fire management team, said the oddness of the phenomenon, heavy smoke cover even in unstable air conditions, was spooky.

2.   A few showers will form in the unstable air across northern Minnesota and Wisconsin.

3.   Such large aircraft can create unstable air in their wake because their wingtips throw off minitornadoes.

4.   This is the unstable air left by another jet.

5.   This is most likely in the unstable air over the Southeast.

6.   Thunderstorms are possible in eastern Washington and Oregon as the front pushes into more unstable air.

7.   Light showers and more unstable air are expected across the virgin islands.

8.   The greatest chance for precipitation will be tonight when moist and unstable air moves in behind the wave.

9.   These winds will bring pockets of unstable air into the northeast Caribbean, allowing numerous showers and widely scattered thunderstorms to develop over the area.