An Upper Level High Pressure Ridge (“Arch”shape) weakens a bit increasing onshore airflow allowing cooling.  The graphics for days 1-3 show what’s left of a weak cold frontal system that moved through the Pacific Northwest. The graphics for days 3-7  show a cold frontal system to the west of us  and moving through Tuesday and next Wednesday.

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ADVISORIES:

• NONE AT THIS TIME.

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,
• Partly cloudy and a bit cooler Sunday, mostly cloudy Sunday night,
• AM clouds, sunny and a bit cooler Monday, mostly clear at night,
• Mostly sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
• lows 58-60 cooling to 58 Monday night warning to 59 Tuesday night highs 85-82 warning to 89 Tuesday.
• Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
• Some AM clouds, sunny and a bit cooler Thursday, partly cloudy at night,
• Then partly cloudy and a bit cooler Friday and Saturday, partly cloudy Friday night.
•  highs 92-85 lows 60-58. (seasonal averages high 87 low 58).

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

• Mostly clear this evening, becoming mostly cloudy late tonight,
• Mostly cloudy start, partly cloudy and a bit warmer Sunday afternoon, mostly cloudy Sunday night,
• AM clouds, sunny and a bit cooler Monday afternoon, mostly clear in the evening, partly cloudy late at night,
• Partly cloudy and a bit warmer Tuesday, then partly cloudy Tuesday night.
• lows 52-53 Sunday night cooling back to 52 Monday night warming to 53 Tuesday night highs 69-68 warming back to 69 Tuesday.
• Partly cloudy and a bit warmer Wednesday, mostly cloudy Wednesday night,
• Mostly cloudy and a bit cooler Thursday, mostly cloudy at night,
• Then mostly cloudy Friday through Saturday.
• highs 70-68 lows near 53.
• (seasonal averages high 67 low 54).                                                                                                                                                                                                                                                                                                                                                                                                                         _______________

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

• Mostly clear this evening, partly cloudy late tonight,
• Mostly cloudy start, a mix of clouds and sun and a bit cooler Sunday afternoon, mostly cloudy Sunday night,
• Mostly sunny and a bit cooler with a slight (20%) chance of showers Monday, becoming mostly clear at night,
• Sunny and a bit warmer Tuesday, mostly clear Tuesday night.
• free air freezing level 15,000 ft. tonight, 15,000 ft. falling to 14,000 ft. Sunday afternoon, 14,000 ft. falling to 12,000 ft. late Sunday night, snow level above 8,000 ft. Monday, free air freezing level 12,000 ft. Monday night, then then 13,000 ft. Tuesday and Tuesday night.
• lows 46-48 cooling back to 46 Monday night warming to 49 Tuesday night highs 70-68 warming to 74 Tuesday.
• Sunny and a bit warmer Wednesday,  mostly clear Wednesday night,
• Sunny Thursday, partly cloudy at night,
• Sunny and a bit cooler Friday, partly cloudy in the evening, clear Friday night,
• Then mostly sunny Saturday.
• free air freezing level Wednesday, 14,000 ft. Wednesday night through Thursday night, then 13,000 ft. Friday through Saturday.
• highs 78-74 lows 52-48.