1.   Although Hurricane Opal will remain over the Gulf of Mexico on Tuesday, abundant tropical moisture will stream north ahead of the system.

2.   Ample tropical moisture will contribute to flooding downpours.

3.   An onshore flow will bring tropical moisture toward the Southeast coast encouraging clusters of clouds and thundershowers from the Carolina coast to Florida.

4.   As a disturbance approaching California drew this plume of tropical moisture into its circulation, pockets of moderate to heavy rainfall swept inland over Santa Barbara County.

5.   As the tail end of the front stalls over the Gulf of Mexico, tropical moisture will be drawn onshore, resulting in storms with locally heavy rains.

6.   A cluster of heavy thundershowers may drench northwest Florida as tropical moisture merges with an approaching cold front.

7.   A new surge of tropical moisture will bring locally heavy showers and thunderstorms to central and southern Florida.

8.   A few showers will arrive in southeastern Florida as persistent winds from the east carry tropical moisture toward the coast.

9.   A few showers will return to the Southwest as tropical moisture streams northward from the Gulf of California.

10.   A plume of tropical moisture will precede a cold front moving swiftly across the northern tier of the nation.