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Sorry, no winner this week. Here is my weather quiz question for the last time this week. What is a supercell? Here is the correct answer. A supercell is an often dangerous convective storm with a very organized internal structure including a rotating updraft that allows it to keep going for up to several hours. Supercells are capable of producing severe weather including high winds, large hail, and strong tornadoes. They are most frequently isolated and often develop in the warm air ahead of a squall line. A supercell also usually forms in an environment with strong vertical wind shear that causes the updraft to begin rotating. I’ll have another weekly weather quiz question for you starting next 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: NONE AT THIS TIME
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A high pressure ridge (Partially shaded “Arch” shape with blue arrows over Western Canada) is bringing continued sunshine to the Pacific Northwest for the whole weekend. A weak frontal system is stalling as it tries to move through Oregon, but will fall apart and have almost no effect on our weather except to cool us down just a bit. A trough of low pressure (Shaded “U” shape with blue arrows in the Gulf of Alaska) will move closer to the Oregon coast bringing more clouds, but it looks like the chance of precipitation is gone for now.
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Forecast for the Umpqua Basin including Roseburg: Mostly clear tonight, sunny and a bit warmer Sunday, mostly clear Sunday night, sunny and a bit warmer Monday, mostly clear in the evening, mostly cloudy Monday night, then partly cloudy and cooler Tuesday and Tuesday night lows 47-52 cooling to 44 Tuesday night highs 82-86 cooling to 75 Tuesday. Partly cloudy Wednesday, mostly clear in the evening, partly cloudy Wednesday night and Thursday, partly cloudy with a slight (20%) chance of showers late Thursday night, then partly cloudy Friday through Saturday highs near 78 lows 44-47. (seasonal averages high 74 low 48)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear tonight, sunny Sunday, mostly clear Sunday night, sunny and just a bit warmer Monday, then mostly clear in the evening, mostly cloudy late Monday night with patchy coastal fog, mostly cloudy with patchy AM fog, sunny Tuesday afternoon, then partly cloudy Tuesday night lows 48-52 cooling to 45 Tuesday night highs 63-65 cooling to 62 Tuesday. Partly cloudy Wednesday through Thursday, partly cloudy with a slight (20%) chance of showers Thursday night, partly cloudy Friday and Friday night, then partly cloudy with a slight (20%) chance of showers Saturday highs 65-62 lows 45-48. (seasonal averages high 64 low 48).
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Forecast for the Cascades of Lane County: Mostly clear tonight, mostly sunny Sunday, mostly clear Sunday night, sunny and a bit warmer Monday, mostly clear Monday night, partly cloudy Tuesday AM, mostly sunny in the afternoon, then partly cloudy Tuesday night free air freezing level 14,000 ft. tonight, 15,000 ft. Sunday through Monday night, then 13,000 ft. Tuesday and Tuesday night lows 45-42 highs 72-75 cooling to near 70 Tuesday. Partly cloudy with slow cooling Wednesday through Saturday free air freezing level 13,000 ft. Wednesday through Thursday, 12,000 ft. Thursday night and Friday, then 11,000 ft. Friday night and Saturday highs 67-59 lows near 39.
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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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