An Upper Level High Pressure Ridge (“Arch”shape) kept heating us up today, but that’s going to change. The graphics for days 1-3 show a dry cold  front moving through the Pacific Northwest today. The graphics for days 3-7   Saturday through Wednesday show a cold frontal system will be to our northwest then pushing through next Monday.

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• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE CENTRAL MOUNTAINS OF OREGON AND THE SOUTHERN DESCHUTES NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 11 PM TONIGHT FOR THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, AND THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE  AND WESTERN HARNEY COUNTIES.
• *A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM 2 PM UNTIL 9 PM TODAY FOR THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, AND THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE  AND WESTERN HARNEY COUNTIES.
• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE JOHN DAY VALLEY, THE CENTRAL MOUNTAINS OF OREGON, AND THE SOUTHERN DESCHUTES NATIONAL FOREST.
• *A RED FLAG WARNING IS IN EFFECT FOR WIND AND LOW RELATIVE HUMIDITY FROM 11 AM UNTIL 10 PM TODAY FOR THE LOWER COLUMBIA BASIN OF OREGON.
• *A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 11 PM TODAY FOR ABUNDANT LIGHTNING FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON.
• A RED FLAG WARNING IS IN EFFECT FOR LIGHTNING FROM 3 PM MDT TODAY THROUGH 11 PM TONIGHT FOR THE BURNS BLM, THE SOUTHERN GRASSLANDS, CENTRAL CANYONLANDS, AND THE NORTHWESTERN VALE BLM.
• A HEAT ADVISORY IS IN EFFECT FROM 11 AM UNTIL 9 PM TODAY FOR THE LOWER COLUMBIA BASIN OF OREGON AND THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON.
•  A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM MDT TONIGHT FOR THE OREGON LOWER TREASURE 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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• Some AM clouds, sunny and a bit cooler this afternoon, mostly clear this evening, mostly cloudy late tonight,
• AM clouds, sunny and a bit warmer Thursday afternoon, clear Thursday night,
• Sunny and a bit warmer Friday, then clear Friday night.
• highs 86-92 lows 62-60 warming back to 62 Friday night.                   .
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, clear at night,
• Sunny and a bit cooler Monday, clear Monday night,
• Then sunny and a bit warmer Tuesday.
•  highs 95-96 cooling to 94 Monday warming to 95 Tuesday lows 63-64 cooling to 60 Monday night (seasonal averages high 85 low 57).

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

• Mostly cloudy with patchy AM fog, sunny and a bit warmer this afternoon, mostly cloudy tonight,
• AM clouds, sunny Thursday afternoon, mostly clear at night,
• Mostly sunny Friday, then mostly clear Friday night.
• highs near 72 lows 54-55 cooling to 53 Thursday night and Friday night.
• Mostly sunny Saturday, a mostly clear in the evening, partly cloudy late Saturday night,
• Mostly sunny and a bit warmer Sunday, mostly clear at night,
• Mostly sunny and a bit cooler Monday, mostly clear Monday night,
• Some AM clouds, then sunny and a bit warmer Tuesday afternoon.
• highs 73-70 warming back to 73 Tuesday lows 54-52.
• (seasonal averages high 66 low 53).                                                                                                                                                                                                                                                                                                                                                                                                                         _______________

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

• Sunny and a bit cooler today, partly cloudy this evening, mostly cloudy late tonight,
• Mostly sunny Thursday, clear at night,
• Sunny and a bit warmer Friday, clear Friday night.
• free air freezing level 13,000 ft today, 14,000 ft. rising to  15,000 ft. tconight, 15,000 ft. Thursday and Thursday night, then 16,000 ft. Friday and Friday night.
• highs 72-82 lows 48-52.
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny Sunday, clear at night,
• Sunny Monday, clear Monday night,
• Then sunny and a bit warmer Tuesday.
• highs 83-84  Wednesday lows 53-52.
• free air freezing level 16,000 ft. Saturday through Sunday, then 16,000 ft. Sunday night through Monday.
• highs 82-83 lows 52-53.