Here is my weekly weather quiz question. What is a “Severe Thunderstorm?” 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 trough of low pressure (Shaded “U” shape with blue arrows) that is offshore has brought cooler moist air inland from the coast cooling us down from record highs to below average temperatures. Upper air high pressure (Shaded “Arch” shape with blue arrows) starts clearing us up and drying us out.  A frontal system finally moved through to bring the change. So far, Sunday looks dry. Low pressure cuts the sunshine short next week. By next Friday a frontal system will be pushing toward the Pacific Northwest.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 26 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 9 in the Good category measuring Ozone.

Cottage Grove: The Air Quality Index is 26 in the Good category measuring Ozone.

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

________________

Advisories: None At This Time.

________________

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

• Patchy AM fog, a mix of clouds and sun with a slight (20%) chance of showers and a bit cooler this afternoon (under 0.10 in. of rain possible), just partly cloudy late tonight and Sunday AM, mostly sunny and a bit warmer in the afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
• Mostly cloudy with a (40%) chance of showers and a bit cooler Monday and Monday night.
• highs 69-76 cooling to 67 Monday lows 44-48.
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Tuesday and Tuesday night,
• A mix of clouds and sun with a (30%) chance of showers and a bit warmer Wednesday, mostly cloudy with a (30%) chance of showers at night,
• Mostly cloudy with a (40%) chance of showers and a bit cooler Thursday and Thursday night,
• Then mostly cloudy with a (30%) chance of showers and a bit warmer Friday.
• highs 65-68 cooling to 64 Thursday warming to 67 Friday lows 45-50 cooling back to 45 Tursday night. (seasonal averages high 72 low 47).

_____

Eugene-Springfield Pollen Count:

Grass………. Moderate (19)

Trees………. Low (11)

Last Counted: 6/10/16

Data Courtesy of Oregon Allergy Associates.

___________________

Forecast for Roseburg:

• Partly cloudy and a bit warmer this afternoon, mostly cloudy this evening, becoming mostly clear late tonight,
• Sunny and a bit warmer Sunday, mostly clear in the evening, partly cloudy late Sunday night,
• Mostly cloudy with a slight (20%) chance  of showers and a bit cooler Monday, then a (30%) chance of showers Monday night.
• highs 72-80 cooling back to 72 Monday lows near 48.
•  Mostly cloudy and a bit cooler with a (30%) chance of showers Tuesday, a slight (20%) chance of showers at night,
• Then mostly cloudy and a bit warmer with a (30%) chance of showers Wednesday through Friday.
• highs 67-72 lows 47-50. (seasonal averages high 75 low 51).

________________

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

• Partly cloudy this afternoon and tonight,
• Sunny and a bit warner Sunday, mostly clear in the evening, mostly cloudy late Sunday night,
• Then mostly cloudy with a (30%) chance of showers Monday and Monday night.
• highs near 62 lows near 50.
• Mostly cloudy with a (40%) chance of showers Tuesday through Friday.
• highs 60-63 lows near 50. (seasonal averages high 61 low 50)

________________

Forecast for the Cascades in Lane County:

• A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers this afternoon , just partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late tonight,
• Mostly sunny and a bit warmer Sunday, partly cloudy at night,
• A mix of clouds and sun with a (30%) chance of showers and a bit cooler Monday afternoon, then mostly cloudy with a (40%) chance of showers at night.
• snow level 5,000 ft. rising to 6,500 ft. this afternoon, above 8,000 ft. tonight, free air freezing level 12,000 ft. Sunday, 11,000 ft.Sunday night, then snow level 8,000 ft. Monday, then 6,500 ft. Monday night.
• highs 55-64 cooling to 57 Monday lows 34-37 cooling to 35 Sunday night.
• Mostly cloudy with a good (50%) chance of showers and a bit cooler Tuesday afternoon, mostly cloudy with a good (50%) chance of showers in the evening, partly cloudy with a good (50%) chance of showers late Tuesday night,
• A mix of clouds and sun with a (40%) chance of showers and a bit warmer Wednesday, mostly cloudy with a (40%) chance of showers at night,
• A mix of clouds and sun with a good (50%) chance of showers Thursday, mostly cloudy with a (40%) chance of showers at night,
• Then mostly cloudy with a (30%) chance of showers Friday
• snow level 5,500 ft. Tuesday, 5,000 ft. Tuesday night, 5,000 ft. Wednesday, 6,000 ft. Wednesday night, then 5500 ft. Thursday and Thursday night, then 6,000 ft. Friday.
• highs 49-55 cooling to 44 Thursday warming back to 55 Friday lows 35-37 cooling to 33 Thursday night.

________________

**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.

________________