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Here it is, another Monday and time for a new weekly weather quiz question. In meteorology what does the acronym “ECMWF” stand for and what is its significance? 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.

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Advisories: NONE AT THIS TIME.

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An upper level trough of low pressure (“U” shape) is moving through the Pacific Northwest, but a series of ripples in that flow will be followed by an even stronger low that will slide along the coast. That will keep us alternating between periods of  clouds and cooler temperatures, and maybe even some light rain or drizzle, then back to some more sunshine and warming temperatures.

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Here are your detailed forecasts.**

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy today and tonight, mostly cloudy with a slight (20%) chance of showers Tuesday AM, mostly cloudy with a (30%) chance of showers Tuesday afternoon and night, a slight (20%) chance of showers Wednesday, then just mostly cloudy Wednesday night highs near 72 lows 52-47. Mostly cloudy Thursday AM, a mix of clouds and sun Thursday afternoon, partly cloudy in the evening, mostly cloudy Thursday night, then a mix of clouds and sun and warmer Friday through Sunday, mostly cloudy Friday night and partly cloudy Saturday night highs 72-78 lows near 50. (seasonal averages high 81 low 51)

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The Pollen forecast for the Eugene/Springfield Area is for  trees to be low, weeds to be moderate, and Grass to be very high. (Provided by Allergy and Asthma Research Group)

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Forecast for the Umpqua Basin including Roseburg:  Mostly cloudy this AM, partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of light rain or drizzle late tonight, mostly cloudy Tuesday AM, partly cloudy Tuesday afternoon and evening with a slight (20%) chance of showers, then mostly cloudy with a slight (20%) chance of showers Tuesday night through Wednesday AM, then mostly cloudy Wednesday night highs 79-70 lows 55-50. Mostly cloudy and a bit warmer Thursday, partly cloudy Thursday night and Friday, mostly cloudy and a bit warmer Friday night and Saturday, then back to partly cloudy Saturday night and Sunday highs 76-83 lows near 55. (seasonal averages high 85 low 54)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with a slight (20%) chance of areas of drizzle this AM, mostly cloudy this afternoon and tonight with a slight (20%) chance of drizzle and patchy fog late at night and early Tuesday AM, mostly cloudy with a slight (20%) chance of showers in the afternoon, mostly cloudy with a slight (20%) chance of showers and a bit cooler late Tuesday night through Wednesday evening, then mostly cloudy with a slight (20%) chance of showers Wednesday evening, the mostly cloudy at night highs 65-60 lows near 53. Mostly cloudy Thursday through Saturday AM, then partly cloudy Saturday afternoon through Sunday highs 65-62 lows near 52. (seasonal averages high 66 low 52).

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Forecast for the Cascades of Lane County: A mix of clouds and sun today, mostly cloudy tonight, mostly cloudy with a slight (20%) chance of showers Tuesday afternoon, mostly cloudy with a good (50%) chance of showers in the evening, (30%) chance of showers late Tuesday night, mostly cloudy Wednesday AM, a mix of clouds and sun in the afternoon with a slight (20%) chance of showers, then mostly cloudy with a slight (20%) chance of showers Wednesday night free air freezing level 12,000 ft. today, 11,000 ft. tonight, then a snow level above 8,000 ft. Tuesday through Wednesday night highs 67-56 lows 40-37. Mostly cloudy Thursday AM, a mix of clouds and sun in the afternoon with a slight (20%) chance of showers, partly cloudy Thursday night with a slight (20%) chance of showers, a mix of clouds and sun with a slight (20%) chance of showers Friday, partly cloudy with a slight (20%) chance of showers Friday night and Saturday, then partly cloudy Saturday night and Sunday snow level above 8,000 ft. Thursday through Saturday, then a free air freezing level at 12,000 ft Saturday night and Sunday highs 60-68 lows near 40.

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**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.

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Get your local Eugene /Springfield news on-line at EugeneDailyNews.com.

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