Here is my new weekly weather quiz question. What are “Instrument Flight Rules (IFR)?

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A very strong Jet Stream flow www.wunderground.com/maps/wind/jet-stream  from the northeast is sending much cooler air to the Pacific Northwest. A strong cold front www.wpc.ncep.noaa.gov  pushed through the Pacific Northwest from the northeast (called a backdoor cold front) bringing colder air with it. It will take a while for temperatures to warm back up again. There will be frontal activity returning by the end of the week, but not of the bitter cold airflow nature.

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Air Quality Index:

Eugene/Springfield: The Air Quality Index is 18 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

NOTE: Outdoor burning remains temporarily prohibited for the following areas: Eugene-Springfield, Florence, Lowell, Oakridge and UGB, and Springfield and UGB.

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ADVISORIES:

• A FREEZE WARNING IS IN EFFECT FROM 7 PM TONIGHT UNTIL 10 AM TUESDAY  FOR THE SOUTH CENTRAL OREGON COAST.
• A BEACH HAZARDS STATEMENT FOR DANGEROUS SNEAKER WAVES IS IN EFFECT FROM THIS EVENING THROUGH TUESDAY MORNING FOR THE SOUTH CENTRAL OREGON COAST AND THE CURRY COUNTY COAST.
• AN AIR STAGNATION ADVISORY IS IN EFFECT UNTIL 1 PM MST (MOUNTAIN STANDARD TIME) FRIDAY FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy this evening, mostly cloudy late tonight,
• Mostly cloudy, possible sun breaks, and a bit warmer Tuesday, mostly cloudy Tuesday night,
• Mostly cloudy and a bit warmer Wednesday, mostly cloudy at night,
• Cloudy and a bit cooler with a (30%) chance of rain Thursday afternoon, then cloudy with a good (50%) chance of rain Thursday night.
• lows 23-30 warming to 36 Thursday night highs 45-50 cooling to 46 Thursday.
• Mostly cloudy and a bit warmer with rain likely (70%) Friday, cloudy with a good (50%) chance of evening rain, a slight (20%) chance of rain late Friday night,
• Cloudy and a bit warmer with a good (50%) chance of rain Saturday, rain likely (70%) at night,
• Mostly cloudy and a bit cooler with rain Sunday, cloudy with a good (50%) chance of rain Sunday night,
• Then cloudy and a bit warmer with a (40%) chance of rain Monday.
• highs 49-52 cooling to 46 Sunday warming to 48 Monday lows 37-40 cooling to 38 Sunday night. (seasonal averages high 50 low 35)

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Home Wood Heating Advisory:

Posted Daily

Eugene-Springfield: GREEN– Burning is Allowed.

Oakridge: GREEN– Burning is Allowed.

*Note: Pellet stoves may be used anytime if they produce no visible emissions.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Forecast for the Umpqua Valley including Roseburg:

• Mostly clear this evening, becoming partly cloudy late tonight,
• Mostly cloudy and warmer Tuesday, mostly cloudy Tuesday night,
• Mostly cloudy and a bit warmer Wednesday, mostly cloudy with patchy fog late at night,
• Cloudy and a bit cooler with a slight (20%) chance of rain Thursday, a good (50%) chance of evening rain, then showers likely (70%)  late Thursday night.
• lows 27-33 warming to 39 Thursday night highs 50-54 cooling back to 50 Thursday.
• Mostly cloudy with AM showers likely (70%), a good (50%) chance of showers Friday afternoon, a slight (20%) chance of showers Friday night,
• Cloudy and a bit warmer with a (40%) chance of rain Saturday, rain at night,
• Mostly cloudy with rain and a bit cooler Sunday, evening rain likely (70%), then a good (50%) chance of rain late Sunday night,
• Then mostly cloudy with a (30%) chance of rain Monday.
• highs 50-53 cooling to 48 Sunday and Monday lows 38-42 cooling to 40 Sunday night. (seasonal averages high 51 low 37)

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

• Mostly clear this evening, becoming partly cloudy with widespread coastal frost late tonight and Tuesday AM, mostly cloudy and slightly warmer Tuesday afternoon and Tuesday night,
• Mostly cloudy and a bit warmer Wednesday, mostly cloudy with a slight (20%) chance of coastal rain at night,
• Mostly cloudy with a good (50%) chance of AM rain, a bit cooler with rain likely (70%) Thursday afternoon and evening, then showers likely (70%) late Thursday night.
• lows 28-39 highs 50-55.
• Mostly cloudy and a bit cooler with showers likely (70%) Friday, a good (50%) chance of showers Friday night,
• Mostly cloudy with a good (50%) chance of AM rain, rain and a bit warmer Saturday afternoon, rain at night,
• Mostly cloudy and a bit cooler with rain Sunday, evening rain likely (70%), a good (50%) chance of rain late Sunday night,
• Then mostly cloudy with a (30%) chance of rain Monday.
• highs 53-56 cooling to 52 Sunday and Monday lows near 40. (seasonal averages high 54 low 41)

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Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• A mix of clouds and sun and a bit warmer Tuesday, mostly cloudy Tuesday night,
• Mostly cloudy and a bit warmer Wednesday, partly cloudy in the evening, mostly cloudy late at night,
• Mostly cloudy with a slight (20%) chance of rain and snow and  a bit warmer Thursday, then good (50%) chance of rain and snow Thursday night.
• free air freezing level 4,000 ft. rising to 4,500 ft. late tonight, 5,000 ft. rising to 7,000 ft. Tuesday afternoon, 6,500 ft. falling to 6,000 ft. late Tuesday night, 6,500 ft. rising to 7,500 ft. Wednesday afternoon, 7,000 ft. falling to 6,500 ft. Wednesday night, snow level 3,500 ft. rising to 4,500 ft. Thursday afternoon, then 4,000 ft. falling to 3,500 ft. late Thursday night.
• lows 17-26 cooling to 24 Wednesday night warming to 28 Thursday night highs 39-42 cooling to 39 Thursday.
• Mostly cloudy and a bit cooler with a rain and snow likely (70%) Friday, mostly cloudy with a (40%) chance of evening rain and snow, a slight (20%) chance of rain and snow late Friday night,
• Mostly cloudy and a bit warmer with a good (50%) chance of rain and snow Saturday, rain and snow likely (70%) at night,
• Mostly cloudy and a bit cooler with rain and snow Sunday, evening rain and snow likely (70%), a good (50%) chance of rain and snow Sunday night,
• Then mostly cloudy and a bit cooler with a good (50%) chance of rain and snow Monday.
• snow level 3,500 ft. rising to 4,000 ft. Friday  afternoon, 4,000 ft. Friday night, 3,500 ft. rising to 4,500 ft.  Saturday afternoon, 5,000 ft. Saturday night, 3,500 ft. Sunday and Sunday night, then 3,000 ft., rising to 3,500 ft. Monday afternoon.
• highs 34-37 cooling to 32 Monday lows 25-27 cooling to 25 Sunday night.

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