Here is my new weekly weather quiz question. What is “Latent Heat Flux?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

________________

An upper level low (Shaded “U” shape with blue arrows) will slowly take over.  It already sent cold front through the Pacific Northwest with cooled our temperatures down closer to normal.

_______________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 29 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 32 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA).

________________

Advisories:

• A HEALTH ADVISORY CONTINUES FOR SUNSET BAY STATE PARK BEACH LOCATED IN COOS COUNTY FOR HIGHER-THAN-NORMAL FECAL BACTERIA WHICH CAN RESULT IN DIARRHEA, STOMACH CRAMPS, SKIN RASHES, UPPER RESPIRATORY INFECTIONS AND OTHER ILLNESSES. DIRECT CONTACT WITH THE WATER – ESPECIALLY BY CHILDREN AND THE ELDERLY, WHO MAY BE VULNERABLE TO WATERBORNE BACTERIA – SHOULD BE AVOIDED IN THIS AREA UNTIL THE ADVISORY IS LIFTED. VISITORS SHOULD AVOID WADING IN NEARBY CREEKS, POOLS OF WATER ON THE BEACH, OR IN DISCOLORED WATER AND STAY CLEAR OF WATER RUNOFF FLOWING INTO THE OCEAN.
• A HEALTH ADVISORY CONTINUES FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM, LOCATED JUST NORTH OF KLAMATH FALLS ALONG HIGHWAY 97 IN KLAMATH COUNTY. WATER MONITORING BY THE USGS HAS CONFIRMED THE PRESENCE OF BLUE-GREEN ALGAE TOXINS WHICH CAN BE HARMFUL TO HUMANS AND ANIMALS. SWALLOWING, INHALING OR SKIN CONTACT WITH WATER DROPLETS SHOULD BE AVOIDED.

________________

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

• Mostly cloudy and cooler with a (30%) chance of showers this afternoon and evening, just mostly cloudy late tonight,
• Mostly cloudy with a (30%) chance of rain and a bit cooler Tuesday afternoon (under 0.10 in. of rain possible), then mostly cloudy with a good (50%) chance of rain Tuesday night (under 0.10 in. of rain possible),
• Rain and a bit cooler Wednesday and in the evening, then showers likely (70%) late Wednesday night.
• highs 69-63 lows 47-53.
• Mostly cloudy with AM showers likely (70%), a mix of clouds and sun and a bit warmer with a good (50%) chance of showers Thursday afternoon, a (30%) chance of showers at night,
• AM clouds with a slight (20%) chance of showers, a mix of clouds and sun and a bit warmer Friday with a slight (20%) chance of showers, just partly cloudy Friday night,
• A mix of clouds and sun with a slight (20%) chance of showers and warmer Saturday and Sunday afternoon, mostly cloudy with a slight (20%) chance of showers Sunday night.
• highs 69-79 lows 52-54. (seasonal averages high 78 low 47)

________________

Forecast for the Umpqua Basin including Roseburg:

• Partly cloudy this AM, becoming mostly cloudy with a slight (20%) chance of showers this afternoon (under 0.10 in. of rain possible), just mostly cloudy tonight,
• Mostly cloudy with a slight (20%) chance of rain and a bit cooler Tuesday afternoon (under 0.10 in. of rain possible), cloudy with a (30%) chance of rain Tuesday night (under 0.10 in. of rain possible),
• Then mostly cloudy and a bit cooler with AM rain likely (60%), rain Wednesday afternoon, cloudy with evening showers likely (60%), and Wednesday night.
• highs 70-66 lows 48-54.
• Mostly cloudy with a good (50%) chance of showers Thursday and Thursday night,
• Partly cloudy and warmer Friday through Saturday, mostly clear Saturday night,
• Mostly sunny Sunday afternoon.
• highs 73-82 lows 52-55. (seasonal averages high 79 low 52)

________________

Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Partly cloudy this AM, mostly cloudy this afternoon with a (30%) chance of showers (under 0.10 in. of rain possible), mostly cloudy tonight,
• Mostly cloudy with a (40%) chance of rain Tuesday afternoon (under 0.10 in. of rain possible), cloudy with a good (50%) chance of rain Tuesday night (under 0.10 in. of rain possible),
• Then mostly cloudy with rain Wednesday, showers in the evening, then showers likely (70%) late Wednesday night.
• highs near 60 lows 49-56.
• Cloudy with AM showers likely (70%) Thursday AM, partly cloudy a good (50%) chance of showers in the afternoon, partly cloudy with a (30%) chance of evening showers, just mostly cloudy late Thursday night,
• Mostly cloudy Friday AM, partly cloudy Friday afternoon through Saturday, then mostly cloudy Saturday night and Sunday.
• highs 66-64 lows near 55. (seasonal averages high 65 low 50).

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun with a slight (20%) chance of showers this afternoon, mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy and colder late tonight,
• Mostly cloudy Tuesday, increasing clouds to cloudy and a bit cooler with a slight (20%) chance of rain Tuesday night,
• Mostly cloudy and cooler with rain Wednesday and in the evening, then showers late Wednesday night.
• snow level above 8,000 ft. this afternoon, 6,500 ft. tonight, free air freezing level 7,000 ft. Tuesday, snow level 6,000 ft. Tuesday night, then 6,500 ft.Wednesday and Wednesday night.
• highs 54-47 lows 34-38.
• Mostly cloudy with AM showers, a good (50%) chance of showers and a bit warmer Thursday afternoon, a (40%) chance of showers in the evening, mostly cloudy with a slight (20%) chance of showers late Thursday night,
• A mix of clouds and sun Friday with a slight (20%) chance of AM showers, clouds and sun and a bit warmer in the afternoon, then just partly cloudy Friday night through Sunday.
• snow level 7,000 ft. Thursday, above 8,000 ft. Thursday night and Friday, free air freezing level 12,000 ft. Friday night and Saturday, then 13,000 ft. Saturday night and Sunday.
• highs 53-67 lows 42-44.

_______________

**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.

________________