21.   A broken band of thunderstorms will develop along the cold front late in the day over the eastern Dakotas.

22.   A chilly rain will spread from the southern Great Lakes into the Northeast Tuesday as low pressure develops along the Ohio River and moves toward the Middle Atlantic Coast.

23.   A few heavy thunderstorms will develop along and ahead of the cold front associated with the cold pool across the northern Rockies.

24.   A few thunderstorms will develop along the eastern slopes of the Rockies during the heat of the afternoon.

25.   A few thundershowers will develop along the east slopes of the Rockies where moist air ascends the sloping terrain.

26.   A nearby stalled front became the focus for showers to develop along.

27.   A new low-pressure system will develop along the Carolina coast when a line of heavy thunderstorms reaches the Southeast shore Tuesday afternoon.

28.   A second low will develop along a front in Pennsylvania.

29.   A wave of low pressure may develop along the front Saturday night, causing heavy rain to linger through Sunday morning from the Middle Atlantic states to New England.

30.   Accumulating snow will occur from central Virginia to central and eastern New England on Saturday as low pressure develops along the East Coast.