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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 9AM 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 moved to the east a bit, but still centerer over western Oregon, (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: Clear tonight, sunny Sunday, mostly clear Sunday night, sunny Monday (Columbus Day), partly cloudy in the evening, mostly clear Monday clear, sunny Tuesday, then partly cloudy Tuesday night lows 39-43 highs 70-74. Sunny Wednesday and Thursday, partly cloudy at night, then mostly cloudy with a slight (20%) chance of showers Friday through Saturday 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: Mostly cloudy tonight, sunny 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), mostly cloudy in the evening, clearing Monday night,then partly cloudy Tuesday and Tuesday night lows 40-46 highs 60-63. Partly cloudy Wednesday and Wednesday night, sunny Thursday, partly cloudy at night, mostly cloudy with a slight (20%) chance of showers Friday, then mostly cloudy with a (30%) chance of showers Friday night and Saturday highs 60-65 lows 46-49. (seasonal averages high 63 low 47)
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Forecast for the Cascades of Lane County: Clear tonight, sunny Sunday, clear at night, mostly sunny Monday (Columbus Day), partly cloudy Monday night, mostly sunny Tuesday, then partly cloudy Tuesday night free air freezing level 11,000 ft. tonight, 11,000 ft. rising to 12,000 ft. Sunday, 12,000 ft. Sunday night, then 11,000 ft. Monday through Tuesday night lows 34-37 highs near 63. Mostly sunny Wednesday, partly cloudy Wednesday night through Thursday night, a mix of clouds and sun Friday, then mostly cloudy with a slight (20%) chance of showers Friday night and Saturday free air freezing level 11,000 ft. Wednesday through Thursday night, 10,000 ft. Friday, then snow level above 8,000 ft. Friday night and Saturday highs 63-54 lows 38-34.
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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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