1.   Flight directors were keeping close tabs Tuesday on a frontal system in the Midwest.

2.   An autumnal air mass will cover the Eastern states as a frontal system shifts off the Atlantic seaboard.

3.   A complex frontal system will cross the Northeast prompting a batch of showers with embedded thunder to move through the region Thursday morning.

4.   A complex frontal system will approach the Northwest Coast.

5.   A complex frontal system will cross the Rockies.

6.   A band of rain with imbedded thunderstorms will precede the frontal system as it sweeps northeast from the Middle Atlantic states toward New England.

7.   A broken band of heavy showers and a few thunderstorms will form near a weak frontal system as it moves through the interior Northeast.

8.   A complex frontal system will move through the Plains states.

9.   A complex frontal system will spread a band of moderate rain into parts of the Northeast on Friday.

10.   A frontal system accompanied by a broken band of showers will move quickly from the eastern part of the Great Lakes and Ohio Valley into the interior Northeast.