41. Scattered mountain snow and valley rain showers will develop north of the associated warm front . 42. Clouds will arrive in the Northwest as a warm front approaches from the North Pacific. 43. Slightly milder air will arrive in the northern Plains on Wednesday behind a warm front . 44. Very warm air will surge into the Middle Atlantic behind a warm front on Thursday. 45. Fog can also occur preceding a warm front passage. 46. Rain and mountain snow will develop near the northwest coast as a warm front approaches. 47. Clouds and some light snow will accompany a developing warm front across the northern Plains. 48. A warm front will push milder air from the North Pacific into the western Plains. 49. A warm front was expected to bring clouds and scattered showers to the Tennessee Valley. 50. A small cluster of thundershowers will attend a warm front moving out of eastern New York.
