11. Clouds will creep inland to the Cascades as a front approaches the Northwest Coast. 12. Clouds will thicken near the central and southern Appalachians as a cool front approaches. 13. Clouds will thicken Sunday as a front approaches. 14. Elsewhere, a cool front will approach the Northwest, accompanied by patchy clouds. 15. Heavy rain will sweep across the Northwest Coast late Tuesday as a potent Pacific front approaches. 16. Isolated to widely separated thunderstorms will develop later Thursday over the mountains of southern Montana and northern Wyoming as a cool front approaches. 17. Many clouds will cover the Pacific States as a complex front approaches the coast. 18. Meanwhile, showers will encroach the Pacific Northwest Coast as a front approaches. 19. Most of the area will have abundant sunshine, but isolated afternoon thunderstorms will erupt in the Dakotas as a front approaches from the northern Rockies. 20. Partial sunshine and warm weather will cover the Eastern seaboard, though a brief afternoon shower may occur in the Northeast as a cool front approaches from the West. |