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Sorry, no winner this week. One person did come close. Here is my weekly weather quiz question for the last time. What is a “lahar.” Here is the correct answer. A lahar is a type of mudflow or debris flow composed of pyroclastic material, rocky debris, and water. The material flows down from a volcano, typically along a river valley. It is very dangerous because it’s consistency and the way it acts is very much like cement. It is liquid when it’s moving, but when it stops, it solidifies. This can cause just as much devastation as lava itself. I’ll have another weekly weather quiz question for you starting on Monday. 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: A FROST ADVISORY IS IN EFFECT FROM 3 AM UNTIL 9 AM SUNDAY FOR EASTERN CURRY COUNTY, JOSEPHINE COUNTY AND JACKSON COUNTY. A FREEZE WARNING IS IN EFFECT FROM 3 AM UNTIL 9AM SUNDAY FOR THE KLAMATH BASIN. A RED FLAG WARNING (for fire danger) IS IN EFFECT UNTIL NOON SUNDAY FOR THE NORTHERN HALF OF EASTERN OREGON INCLUDING THE NATIONAL FORESTS AND THE I-5 CORRIDOR FROM PORTLAND SOUTH THROUGH EUGENE-SPRINGFIELD TO COTTAGE GROVE FOR WINDS AND LOW RELATIVE HUMIDITY. SEE THE LATEST ON THE RED FLAG WARNINGS FROM THE NATIONAL WEATHER SERVICE.
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A high pressure ridge (Shaded “Arch” shape with blue arrows) has set up over the Gulf of Alaska in such a way as to send cool Canadian air our way. The airflow now will be coming from the east as the ridge moved to the east a bit (see blue arrows curving from the northeast) and a thermal trough of low pressure (dashed line along the Oregon coast) our weather pattern will remain stable. We’ll have chilly nights followed by pleasant days with sunshine and average temperatures through the weekend, Columbus Day and beyond.
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Forecast for the Umpqua Basin including Roseburg: Sunny this afternoon, mostly clear tonight, sunny Sunday, mostly clear Sunday night sunny Monday (Columbus Day), then mostly clear Monday night highs 70-74 lows 39-43. Mostly sunny Tuesday and Wednesday, mostly clear Tuesday night, partly cloudy Wednesday night, sunny Thursday, partly cloudy at night, then mostly cloudy with a slight (20%) chance of showers Friday highs 72-77 lows near 45. (seasonal averages high 71 low 47)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Sunny this afternoon, partly cloudy with patchy coastal fog at night and Sunday AM, mostly cloudy in the afternoon, mostly cloudy at the shore while partly cloudy inland Sunday night, mostly cloudy Monday AM, partly cloudy Monday afternoon (Columbus Day), then mostly cloudy with a slight (20%) chance of showers in the evening and partly cloudy late Monday night highs near 60 lows 40-44. Partly cloudy Tuesday through Wednesday night, sunny Thursday, partly cloudy at night, then mostly cloudy with a slight (20%) chance of showers Friday highs 63-60 warming to 66 Friday lows 46-48. (seasonal averages high 63 low 47)
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Forecast for the Cascades of Lane County: Sunny today and Sunday with clear nights, mostly sunny Monday (Columbus Day), then partly cloudy Monday night free air freezing level 11,000 ft. today and tonight, 11,000 ft. rising to 12,000 ft. Sunday, 12,000 ft. falling to 11,000 ft. Sunday night, then 11,000 ft. Monday and Monday night highs near 63 lows 34-37. Mostly sunny Tuesday and Wednesday with partly cloudy nights, then partly cloudy Thursday and Thursday night, then a mix of clouds and sun Friday free air freezing level 10,000 ft. Tuesday, 11,000 ft. Tuesday night and Wednesday, 12,000 ft. Wednesday night, then 11,000 ft. Thursday and Thursday night, then 10,000 ft. Friday highs 60-63 falling to 57 Friday lows near 38.
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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 Eugene Daily News.com
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