An Upper Level High Pressure Ridge (“Arch”shape) takes over as the weak cold front leaves Oregon. The graphics for days 1-3 show the remnants of the dry cold  front that moved through the Pacific Northwest Wednesday. The graphics for days 3-7   Sunday through Thursday show a cold frontal system will be to our northwest Monday then pushing through next Tuesday.

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ADVISORIES:

• A HEAT ADVISORY IS IN EFFECT FROM 2 PM SATURDAY UNTIL 8 PM MONDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
• A HEAT ADVISORY IS IN EFFECT FROM 2 PM SATURDAY UNTIL 8 PM MONDAY FOR CENTRAL DOUGLAS COUNTY AND THE DOUGLAS COUNTY FOOTHILLS.
• AN EXTREME HEAT WARNING IS IN EFFECT FROM 2 PM SATURDAY UNTIL 8 PM MONDAY EVENING FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
• AN EXTREME HEAT WATCH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR THE LOWER COLUMBIA RIVER, THE TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, THE EAST PORTLAND METRO, OUTER SOUTHEAST PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, THE EAST CENTRAL WILLAMETTE VALLEY, THE WESTERN COLUMBIA RIVER GORGE OF OREGON ABOVE 500 FT., AND THE UPPER HOOD RIVER VALLEY.

HEALTH ADVISORIES:

• A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE  RIVER.

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• Mostly clear tonight,
• Sunny and a bit warmer Friday, clear and hazy late Friday night,
• AM haze, sunny and a bit warmer Saturday afternoon, clear at night,
• Sunny and a bit warmer Sunday, clear Sunday night,
• lows 62-66 highs 89-98.
• Sunny and a bit cooler Monday, clear Monday night.
• Sunny and a bit warmer Tuesday and Wednesday, clear both nights,
• Then sunny and a bit cooler Thursday.
•  highs 94-98 cooling to 90 Thursday lows 62-64 cooling to 62 Wednesday night (seasonal averages high 85 low 57).

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Forecast for The South Oregon Coast Including Coos Bay and North Bend:

• Mostly clear this evening, mostly cloudy late tonight,
• Some AM clouds, sunny and a bit warmer Friday afternoon, mostly clear in the evening, partly cloudy late Friday night,
• Some AM clouds with inland haze, sunny and a bit warmer Saturday afternoon, mostly clear in the evening, partly cloudy late at night,
• Some AM clouds, sunny Sunday afternoon, then partly cloudy Sunday night.
• lows near 54 highs 70-73.
• Partly cloudy and a bit cooler Monday, mostly clear in the evening, partly cloudy late Monday night,
• Some AM clouds, sunny and a bit warmer Tuesday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Wednesday, partly cloudy with patchy fog late Wednesday night,
• Patchy AM fog, then partly cloudy and a bit cooler Thursday afternoon.
• highs 70-73 cooling to 69 Thursday lows 52-54.
• (seasonal averages high 66 low 54).                                                                                                                                                                                                                                                                                                                                                                                                                         _______________

Forecast for the Northern Oregon Cascades including the Cascades in Lane County:

• Mostly clear tonight,
• Sunny and a bit warmer Friday and Saturday, clear both nights,
• Sunny and a bit warmer Sunday, then clear Sunday night.
• free air freezing level 15,000 ft. tonight, 15,000 ft. rising to 16,000 ft. Friday afternoon, 16,000 ft. Friday night through Sunday night,
• lows 47-55 cooling to 53 highs 78-85.
• Sunny and a bit cooler Monday, clear at night,
• Sunny and a bit warmer Tuesday and Wednesday, clear both nights,
• Then sunny and a bit cooler Thursday.
• highs 85-84 warming to 88 Wednesday lows 54-52 warming to 56 Tuesday night.
• free air freezing level Monday, above 16,000 ft. Monday night, 16,000 ft. Tuesday through Wednesday night, then 15,000 ft. Thursday.
• highs 82-83 lows 52-53.