Here is my weekly weather quiz question. What is an“Adiabatic Lapse Rate?” Please remember to post your answer at the bottom of this page. An email will not suffice. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

An Upper level High (Shaded “Arch” shape with blue arrows) to our Northwest is still sending cold air down to us from Canada. The days 1-3 graphic shows  surface low and frontal system headed our way for another ice storm on Saturday as the warm air ahead of the front meets the cold air already in place at the surface. The graphic for days 3-7 shows another frontal system that will be headed our way next Wednesday. For mountain snow conditions at the local ski areas check out their websites or give them a call.

________________

 

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 83 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 80 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 79 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

Home Wood Heating Advisory:

Eugene-Springfield: YELLOW – Caution is Advised.

Oakridge: YELLOW – Caution is Advised.

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

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

________________

Advisories:

• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY EVENING FOR THE COAST RANGE OF NORTHWEST OREGON AND THE GREATER PORTLAND METRO AREA.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH LATE SATURDAY NIGHT FOR THE CENTRAL COAST RANGE OF WESTERN OREGON, AND THE SOUTH WILLAMETTE VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY MORNING FOR THE LOWER COLUMBIA.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING  FOR THE CENTRAL WILLAMETTE VALLEY AND THE NORTHERN OREGON CASCADE FOOTHILLS.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY MORNING FOR THE CENTRAL WILLAMETTE VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH LATE SUNDAY NIGHT FOR THE WESTERN COLUMBIA RIVER GORGE, AND THE CENTRAL COLUMBIA RIVER GORGE, THE CASCADE FOOTHILLS IN LANE COUNTY.
• A WINTER STORM WATCH IS IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE SUNDAY NIGHT FOR THE THE UPPER HOOD RIVER VALLEY.
• A WINTER STORM WATCH IS IN EFFECT FROM THIS EVENING THROUGH SATURDAY MORNING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
• A WINTER WEATHER ADVISORY IS IN EFFECT FROM 10 PM TONIGHT THROUGH 10 PM SATURDAY NIGHT FOR THE EASTERN DOUGLAS COUNTY FOOTHILLS, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS,
• A WINTER STORM WATCH IS IN EFFECT FROM THIS EVENING THROUGH LATE SATURDAY NIGHT FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND CENTRAL, EASTERN, AND WESTERN LAKE COUNTY.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson 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.

________________

 

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

• Sunny and a bit cooler this afternoon, partly cloudy this evening, mostly cloudy and cold with a (30%) chance of snow late tonight,
• Cloudy with early AM snow likely (70%),  freezing rain and sleet Saturday afternoon (0.50 in. of rain possible), freezing rain in the evening, rain and freezing rain late Saturday night (0.25 in. of rain possible),
• Mostly cloudy with rain and a bit warmer Sunday, then rain likely (70%) Sunday night.
• highs 32-38 lows 25-36.
• Mostly cloudy with rain and a bit cooler Monday, rain likely (70%) at night,
• Mostly cloudy with rain Tuesday and Tuesday night,
• Showers likely (70%) Wednesday and at night,
• Then mostly cloudy with rain likely (70%) Thursday.
• highs near 42 lows near 36. (seasonal averages high 46 low 34)

 

_____________________

Forecast for Roseburg:

• Sunny and a bit warmer this afternoon, mostly clear this evening, mostly cloudy with a (40%) chance of rain and snow late tonight (1-2 in. of snow possible, snow level 300 ft. late at night),
• Mostly cloudy with rain, snow and a (40%) chance of light freezing rain Saturday AM (AM snow level 300 ft., rain with a (40%) chance of light freezing rain and a bit warmer in the afternoon (0.50 in. of rain possible, 1-2 in. of snow possible, under 0.25 in. of ice accumulation possible), then rain Saturday night (0.25 in. of rain possible) through Sunday night.
• highs 36-48 lows 27-42 cooling to 39 Sunday night.
• Cloudy with rain and snow and a bit cooler Monday and Monday night,
• Rain and a bit warmer Tuesday and at night,
• Mostly cloudy with rain likely (70%) and a bit cooler Wednesday and Wednesday night,
• Then rain and a bit cooler Thursday.
• highs 45-47 cooling to 44 Thursday lows near 38. (seasonal averages high 49 low 36)

 

________________

 

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

• Sunny and a bit warmer this afternoon, mostly clear this evening, becoming mostly cloudy with a good (50%) chance of coastal rain late tonight while a (40%) chance of rain and snow inland (under 0.10 in. of rain possible, snow level 1,000 ft.),
• Mostly cloudy with coastal rain Saturday while inland rain, snow and a (40%) chance of light freezing rain in the AM with inland rain Saturday and a bit warmer afternoon (0.50 in. of rain possible, AM snow level 1,000 ft.), rain Saturday night (0.50 in. of rain possible),
• Then cloudy with rain and a bit warmer Sunday and Sunday night.
• highs 44-52 lows 35-44.
• Mostly cloudy with rain, a bit cooler Monday through Tuesday (a bit warmer), rain and breezy Tuesday night,
• Rain likely (70%) and a bit cooler Wednesday and Wednesday night,
• Then rain and a bit cooler Thursday.
• highs 48-52 cooling back to 52 Thursday lows near 42. (seasonal averages high 51 low 40)

 

 

________________

 

Forecast for the Cascades in Lane County:

• Sunny and a bit warmer today, partly cloudy this evening, mostly cloudy and cold with a (30%) chance of snow flurries late tonight,
• Cloudy with AM snow likely (70%), rain and snow and a bit warmer Saturday afternoon (0.25 in. of rain possible, 1-4 in. of snow possible), rain and snow and a bit warmer Saturday night and windy (Wind: E 20-30 mph),
• Mostly cloudy with rain and snow and a bit warmer Sunday and breezy (Wind: E 15-25 mph decreasing and shifting SE 10-15 mph in the afternoon, then rain at night.
• free air freezing level at the surface today, snow level at the surface tonight and Saturday, 3,000 ft. Saturday night, 6,000 ft. Sunday, then 5,500 ft. Sunday night.
• highs 23-20 warming to 32 Sunday lows 13-24.
• Cloudy with snow and a bit cooler Monday and Monday night,
• Mostly cloudy with snow and a bit warmer Tuesday, rain and snow at night,
• Rain and snow showers and a bit cooler Wednesday, rain and snow showers likely (70%)Wednesday night,
• Then mostly cloudy with snow likely (70%) Thursday.
• snow level at the surface Monday through Tuesday, 3,500 ft. Tuesday night, 4,500 ft. Wednesday, 3,000 ft. Wednesday night, then at the surface Thursday.
• highs 30-32 lows near 25.

 

 

________________

 

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

 

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________