The heat wave is officially ending! Temperatures will continue to fall over the next few days.

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Advisories: A RED FLAG WARNING IS IN EFFECT  THROUGH TONIGHT FOR THE NORTH AND CENTRAL OREGON CASCADES AND FOOTHILLS. A RED FLAG WARNING IS IN EFFECT THROUGH 11 PM TONIGHT FOR POSSIBLE LIGHTNING STRIKES FOR THE KLAMATH BASIN, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.  THAT MEANS THERE IS A HIGH FIRE DANGER FOR THE AREAS LISTED.  A HEAT ADVISORY IS IN EFFECT UNTIL 6 PM TONIGHT FOR THE NORTHERN AND CENTRAL COAST RANGE OF OREGON, UNTIL 8 PM FOR THE WESTERN COLUMBIA RIVER GORGE, THE NORTHERN AND CENTRAL WILLAMETTE VALLEY FROM PORTLAND TO NEAR ALBANY , THE NORTHERN OREGON CASCADE FOOTHILLS (NOT INCLUDING THE FOOTHILLS OF LANE COUNTY),  AND THE UPPER HOOD RIVER VALLEY.

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We have been under a blocking high pressure ridge (“Arch” shape covering the Pacific Northwest) that kept us under Easterly hot airflow. The ridge will weaken and start moving Eastward away from us. That means more clouds and cooler temperatures that will be closer to normal. A frontal system will move in and that should break the back of this heat wave with more fronts to follow late in the week and over next weekend.

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Here are your detailed forecasts.**

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly clear this evening, mostly cloudy late tonight and Monday AM, mostly sunny but cooler Monday afternoon, mostly clear in the evening, mostly cloudy Monday night and Tuesday AM, mostly sunny and cooler in the afternoon, mostly clear Tuesday evening, mostly cloudy Tuesday night and Wednesday AM, mostly sunny and cooler in the afternoon, mostly clear in the evening, then cloudy Wednesday night lows 53-47 highs 82-72. Cloudy Thursday AM, a mix of clouds and sun Thursday afternoon, partly cloudy in the evening, cloudy Thursday night and Friday AM, then partly cloudy and a bit warmer Friday afternoon through Sunday highs 72-76 lows 47-44. (seasonal averages high 79 low 48)

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy with a slight (20%) chance of isolated thunderstorms this evening, partly cloudy with patchy fog late tonight, mostly cloudy with patch fog Monday AM,   mostly sunny and cooler Monday afternoon, mostly clear in the evening, partly cloudy Monday night, mostly cloudy Tuesday AM, mostly sunny and a bit cooler in the afternoon,  and Tuesday afternoon, mostly clear in the evening, mostly cloudy Tuesday night and Wednesday AM, mostly sunny Wednesday afternoon, mostly clear in the evening, then mostly cloudy with patchy fog late Wednesday night lows 56-50 highs 85-79. Mostly cloudy with patchy fog and warming a bit Thursday through Friday, partly cloudy Friday night through Sunday AM, then mostly sunny Sunday afternoon highs 76-80 lows near 50. (seasonal averages high 80 low 52)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, mostly cloudy inland, cloudy at the beaches, patchy fog late tonight and early Monday AM, partly cloudy Monday afternoon, mostly clear in the evening then mostly cloudy inland, cloudy at the beaches, patchy fog late Monday night and early Tuesday AM, partly cloudy Tuesday afternoon and evening, mostly cloudy with patchy fog late Tuesday night and Wednesday AM, mostly cloudy Wednesday night with patchy fog late lows 53-49 highs 58-63. Mostly cloudy with patchy  AM and late night fog Thursday through Friday, just mostly cloudy Friday night and Saturday, then partly cloudy Saturday night and Sunday highs 64-60 warming to 66 Saturday and cooling to near 62 Sunday lows near 50. (seasonal averages high 65 low 51).

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Forecast for the Cascades of Lane County: Partly cloudy this evening with a slight (20%) chance of thunderstorms along the crest South of Santiam Pass, mostly clear late tonight, mostly sunny Monday, partly cloudy with a slight (20%) chance of thunderstorms near the crest South of McKenzie Pass in the afternoon and evening, mostly clear Monday night, mostly sunny Tuesday, mostly clear in the evening, partly cloudy Tuesday night, a mix of clouds and sun Wednesday AM, mostly sunny in the afternoon,  mostly clear Wednesday evening, then mostly cloudy cloudy Wednesday night free air freezing level 14,000 ft. tonight through Wednesday night lows 52-47 highs 76-64. Mostly cloudy Thursday AM, a mix of clouds and sun Thursday afternoon, mostly cloudy Thursday night and Friday AM, partly cloudy Friday afternoon and evening, mostly clear Friday night, then mostly sunny Saturday AM, partly cloudy Saturday afternoon through Sunday AM, then mostly sunny Sunday afternoon free air freezing level 13,000 ft. Thursday, 12,000 ft. Thursday night, 13,000 ft. Friday, 12,000 ft. Friday night, then 13,000 ft. Saturday through Sunday highs 65-70 cooling back to near 64 Sunday lows near 42.

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**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

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Get your local Eugene-Springfield news on-line at EugeneDailyNews.com.

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For more click to continue on to http://timchueyweather4u.com/blog

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