Here is my new weekly weather quiz question. What is“Isentropic Analysis?

_________________

The Upper Level Airflow has been sending moisture west to east straight into the Pacific Northwest, but behind the cold front we get colder.  The graphics for days 1-3 show the cold front moving through and out of the Pacific Northwest. The graphics for days 3-7 show more complex frontal systems moving our way Friday through next Tuesday giving us more chances of getting wet.

________________

Air Quality Index:

Eugene/Springfield: The Air Quality Index is 12 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 36 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 6 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

NOTE: Outdoor burning season has now officially opened. The ban has been lifted.

________________

ADVISORIES:.

• A FLOOD WATCH IS IN EFFECT THROUGH THIS AFTERNOON FOR THE CURRY COUNTY COAST, EASTERN CURRY COUNTY AND JOSEPHINE COUNTY.
• A BACKCOUNTRY AVALANCHE WARNING HAS BEEN ISSUED FOR THE WALLOWA MOUNTAINS SOUTH.

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

• Mostly cloudy with patchy AM fog, a slight (20%) chance of showers and a bit cooler this afternoon (under 0.10 in. of rain possible), a good (50%) chance of showers tonight with patchy fog late (under 0.10 in. of rain possible),
• Clouds and sun with a good (50%) chance of AM showers, a mix of clouds and sun and a bit warmer with a (30%) of showers Wednesday afternoon (under 0.10 in. of rain possible), just mostly clear at night,
• Some AM clouds, mostly sunny and a bit warmer Thursday, then partly cloudy Thursday night.
• highs 48-58 lows 33-28 warming back to 33 Thursday night.
• A mix of clouds and sun with slight (20%) chance of rain and a bit cooler Friday afternoon, mostly cloudy with a good (50%) chance of rain Friday night,
• Mostly cloudy with a good (50%) chance of rain Saturday and at night,
• Mostly cloudy and a bit cooler with rain likely (70%) Sunday, a good (50%) chance of rain Sunday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of AM rain, then rain likely (70%) Monday afternoon.
• highs 57-53 lows 39-37. (seasonal averages high 56 low 37)

__________

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 (LRAPAz

__________

Forecast for the Umpqua Valley including Roseburg:

• Cloudy with dense AM fog with a (30%) chance of snow, a (30%) chance of rain and cooler this afternoon (0.25 in. of rain possible, snow level 800 ft. rising to 1,500 ft.), a (30%) chance of  rain and snow tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM rain and snow showers, a bit warmer with a slight (20%) chance of showers Wednesday afternoon snow level 1,000 ft. rising to 2,000 ft.), becoming mostly clear at night,
• Partly cloudy and warmer Thursday, then partly cloudy Thursday night.
• highs 47-62 lows 35-32 warming to 36 Thursday night.
• Mostly cloudy and a bit cooler with a slight (20%) chance of showers Friday, a (30%) chance of showers Friday night,
• Mostly cloudy and a bit cooler with a (40%) chance of showers Saturday, showers likely (70%) at night,
• Mostly cloudy and a bit cooler with showers likely (70%) Sunday, a good (50%) chance of showers Sunday night,
• Mostly cloudy and a bit cooler with a good (50%) chance of AM rain, then rain likely (70%) Monday afternoon.
• highs 59-54 lows 42-40. (seasonal averages high 59 low 40)

___________

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

• Mostly cloudy and a bit cooler with a slight (20%) chance of coastal rain while a slight (20%) chance of inland AM rain and snow and a slight (20%) chance of inland rain and a bit cooler this afternoon (under 0.10 in. of rain possible, afternoon snow level 1,500 ft.), a slight (20%) chance of coastal rain tonight while a slight (20%) chance of evening inland rain and a slight (20%) chance of inland rain and snow tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of AM coastal showers while a (30%) chance of inland AM rain and snow showers, a slight (20%) chance of showers and a bit warmer Wednesday afternoon (under 0.10 in. of rain possible), becoming mostly clear at night,
• Partly cloudy and a bit warmer Thursday, then partly cloudy Thursday night.
• highs 49-58 lows 36-32 warming to 37 Thursday night.
• Mostly cloudy with a (30%) chance of showers and a bit cooler Friday, a (40%) chance of rain Friday night,
• Mostly cloudy with a good (50%) chance of rain Saturday, showers likely (70%) at night,
• Mostly cloudy with showers likely (70%) and a bit warmer Sunday, a good (50%) chance of showers Sunday night,
• Then mostly cloudy with rain likely (70%) Monday.
• highs 55-53 lows 39-36. (seasonal averages high 55 low 42)

__________

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

• Mostly cloudy with AM showers likely (70%) with a good (50%) chance of snow showers, snow showers likely (70%) a bit cooler this afternoon (0.10 in. of rain possible, 1 in. of snow possible), evening showers likely (70%), snow showers likely (70%) late tonight (0.25 in. of rain possible, 1-2 in. of snow possible),
• Clouds and sun with a good (50%) chance of AM snow showers, a mix of clouds and sun and a bit cooler with a (0%) chance of snow showers and a bit cooler Wednesday afternoon, becoming mostly clear at night,
• Mostly sunny and a bit warmer Thursday, then partly cloudy Thursday night.
• snow level 2,000 ft. rising to 4,000 ft. this afternoon, 3,000 ft. falling to 2,000 ft. tonight, 2,500 ft. Wednesday afternoon, free air freezing level 3,500 ft. falling to the surface Wednesday night, then free air freezing level 5,500 ft. Thursday and Thursday night.
• highs 39-35 lows 23-18 warming back to 23 Wednesday night.
• Clouds and sun with a slight (20%) chance of AM snow, a mix of clouds and sun and a bit cooler with a good (50%) chance of rain and snow Friday afternoon, a good (50%) chance of rain and snow Friday night,
• A mix of clouds and sun with a good (50%) chance of rain and snow Saturday, rain and snow likely (70%) at night,
• Mostly cloudy and a bit cooler with snow and rain Sunday, evening snow and rain likely (70%), a good (50%) chance of snow and rain late Sunday night,
• Mostly cloudy with AM snow likely (70%) and a good (50%) chance of rain, then rain likely (70%) Monday afternoon.
• snow level 3,500 ft. Friday, 4,000 ft. Friday night through Sunday, then 3,500 ft. Sunday  night and Monday.
• highs 34-40 lows 19-27 cooling to 24 Friday night.

__________

For all of your Eugene-Springfield and Lane County News, Weather, and Sports go to: EugeneDailyNews.com

__________