41.   Meanwhile, Pacific air will further warm upon descending the east slopes of the Rockies, causing near-record warmth in the central High Plains.

42.   Meanwhile, unseasonably mild air will continue to embrace much of the upper Middle West as Pacific air floods eastward.

43.   Moderate to heavy rain will douse the Coastal Range and Olympic Mountains of Washington as moist Pacific air races inland.

44.   Much more dramatic swings in temperature can occur when Pacific air wages a tug-of-war with Arctic air over the western high plains.

45.   On Friday, another batch of rain associated with the approach of the leading edge of mild Pacific air will arrive.

46.   On Monday, a stream of moist Pacific air ahead of a cold front will take aim on the Oregon coast, causing heavy rain in western sections.

47.   Pacific air flowing east from the northern Rockies will encounter cold air over the northeast Plains.

48.   Pacific air will stream across the northern Rockies with mountain clouds and some sunshine in the valleys.

49.   Pacific air will stream eastward across the northern Rockies with broken clouds and slightly above seasonal temperatures.

50.   Pacific air will cover the Northwest.