Here is my new weekly weather quiz question. What is a “Jet Max?” 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) is sending moisture and smoke northward at us. We are also seeing a smoky haze over the Eugene-Springfield area caused by local area fires and the wildfires to our south. The low will move inland, finally, bringing showers and possible thunderstorms with itand that should scrub the smoke out of the air for a while at least. A frontal system (shown moving out of Canada) will bring some cooler air with it, but we will start to warm up and dry out again over the weekend.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 94 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 100 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 84 in the Moderate category measuring Particulate Matter.

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

________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR GUSTY WINDS AND LOW RELATIVE HUMIDITH UNTIL 11 PM TONIGHT FOR THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• A RED FLAG WARNING IS IN EFFECT FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FROM 8 AM UNTIL 11 PM FRIDAY FOR THE EAST SLOPES OF THE NORTHERN OREGON CASCADES AND THE LOWER COLUMBIA BASIN OF OREGON.
• A HEALTH ADVISORY HAS BEEN ISSUED 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 HAS BEEN ISSUED FOR UPPER KLAMATH LAKE AND AGENCY LAKE DOWN TO KENO DAM TO THE CALIFORNIA BORDER, 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.
• A HEALTH ADVISORY HAS BEEN ISSUED FOR SEAL ROCK STATE PARK BEACH 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.

____________

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

• Partly cloudy with a slight (20%) chance of showers this evening, mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms late tonight (under 0.10 in. of rainfall possible, more in storms),
• Mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, showers likely (70%) and a bit cooler in the afternoon (under 0.10 in. of rainfall possible, more in storms), mostly cloudy with a slight (20%) chance of showers in the evening, just partly cloudy Friday night and Saturday AM, sunny Saturday afternoon and Sunday, mostly clear Saturday night and Sunday evening, mostly cloudy late Sunday night.
• lows 57-52 warming to 55 Sunday night highs 75-87.
• Sunny and warmer Sunday, mostly clear in the evening, mostly cloudy at night,
• A mix of clouds and sun Monday AM, mostly sunny and a bit cooler in the afternoon, mostly clear in the evening, mostly cloudy Monday night and Tuesday AM, partly cloudy in the afternoon, mostly clear at night,
• A mix of clouds and sun Wednesday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy Wednesday night and Thursday AM, then mostly sunny in the afternoon.
• highs 83-85 lows 57-59. (seasonal averages high 83 low 51)

_________________

Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with more patchy smoke and a (30%) chance of showers this evening, a (30%) chance of showers and thunderstorms late tonight (under 0.10 in. of rain possible),
• A good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday AM, a good (50%) chance of afternoon showers (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers in the evening, just partly cloudy late Friday night,
• Sunny and a bit warmer Saturday, clear at night,
• Sunny and warmer Sunday, then clear at night.
• lows 57-55 warming to 57 Sunday night highs 89-90.
• Sunny and a bit cooler Monday, mostly clear in the evening, partly cloudy late Monday night and Tuesday AM, sunny and a bit cooler in the afternoon, mostly clear at night,
• Mostly sunny and warmer Wednesday, mostly clear Wednesday night,
• Then sunny and a bit warmer Thursday.
• highs 85-83 warming to 89 Thursday lows 56-59. (seasonal averages high 85 low 56)

________________

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

• Mostly cloudy with patchy coastal smoke, a good (50%) chance of evening showers with a slight (20%) chance of thunderstorms this evening, a slight (20%) chance of thunderstorms late tonight (0.10 in. of rain possible),
• Mostly cloudy with patchy coastal smoke and coastal showers likely (60%) with a slight (20%) chance of thunderstorms Friday AM and a (40%) chance of afternoon showers while a good (50%) chance of showers and a slight (20%) chance of thunderstorms inland in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy late at night,
• Sunny Saturday, then clear Saturday night.
• lows 58-54 highs near 66.
• Sunny Sunday, clear in the evening, then partly cloudy late Sunday night through Thursday AM, then mostly sunny Thursday afternoon.
• highs near 66 lows near 56. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of showers and thunderstorms this evening, mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms late tonight,
• Mostly cloudy and a bit cooler with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Friday, mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy late at night and Saturday AM, sunny and warmer in the afternoon, clear Saturday night,
• Sunny and warmer Sunday, then mostly clear at night.
• snow level above 8,000 ft. tonight through Friday night, free air freezing level 13,000 ft. Saturday, 14,000 ft. Saturday night, 15,000 ft. Sunday, then 14,000 ft. Sunday night.
• lows 47-43 warming to 46 Sunday night highs 62-79.
• Mostly sunny Monday AM, partly cloudy and a bit cooler in the afternoon, a slight (20%) chance of showers Monday night,
• A mix of clouds and sun with a slight (20%) chance of showers Tuesday, mostly sunny and a bit cooler in the afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Tuesday night,
• Then mostly sunny and warmer Wednesday, partly cloudy Wednesday night and Thursday AM, then sunny in the afternoon.
• free air freezing level 14,000 ft. Monday, snow level above 8,000 ft. Monday night through Tuesday night, snow level 15,000 ft. Wednesday and Wednesday night, then 16,000 ft. Thursday.
• highs 72-68 warming to 74 Thursday lows 46-44 warming back to 46 Thursday.

_______________

**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.

________________