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Jul

14.

A nice weekend with some clouds and some sun with no serious changes through next week.

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Category: Uncategorized

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Sorry, but no winner this time. Here is my weekly weather quiz question for the last time this week. There was “active” weather in parts of Oregon recently, so I though my question should be about understanding those weather bulletins. The question is: what is the difference between a “Severe Thunderstorm Watch” and a “Severe Thunderstorm Warning?” Here is the correct answer. A severe thunderstorm watch (SAME code: SVA; sometimes referred to as “blue box” or “yellow box” by meteorologists and storm chasers) is issued when weather conditions are favorable for the development of severe thunderstorms. A severe thunderstorm watch can also be upgraded to a tornado watch as conditions warrant (in which case the existing severe thunderstorm watch, or a portion of it, would be replaced). A severe thunderstorm warning (SAME code: SVR) is issued when trained storm spotters or a Doppler weather radar indicate a strong thunderstorm is producing dangerously large hail or high winds, capable of causing significant damage.^[1] A watch must not be confused with a warning. A watch does not mean that the severe weather is actually occurring, only that conditions have created a significant risk for it. The warning means it is already happening.
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.

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Advisories: NONE AT THIS TIME.

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An upper level trough of low pressure will slide closer to us bringing some clouds and slightly cooler temperatures. That means lots of sunshine and warm weather for the Oregon Country Fair that runs through Sunday. The low will move across Oregon today and will be followed by another trough of low pressure to continue our pleasant weather pattern. Early next week a closed low (brown circle) will slide south from Canada bringing us more clouds, but I don’t think we’ll see any precipitation. A frontal system will move through and stall next Thursday.

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The pollen count for the Eugene-Springfield area is:

Grass- Moderate (17) (Observation: It looks like the grass pollen season is just about over.)

Trees- Low (2)

Data from Oregon Allergy Associates www.oregonallergyassociates.com.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: A mix of clouds and sun with a slight (20%) chance of thunderstorms this afternoon and this evening, mostly cloudy tonight and Sunday AM, partly cloudy Sunday afternoon, then partly cloudy Sunday night through Monday night highs 84-78 warming to 80 Monday lows 55-52. Partly cloudy Tuesday through Friday highs near 82 lows 55-52. (seasonal averages high 82 low 52)

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy today and tonight, cloudy Sunday AM, partly cloudy Sunday afternoon and evening, mostly cloudy Sunday night, cloudy Monday AM, then partly cloudy Monday afternoon and Monday night highs 88-83 lows near 58. Partly cloudy Tuesday and Tuesday night, just mostly cloudy Wednesday through Thursday, then partly cloudy Thursday night and Friday highs 82-80 lows 58-55. (seasonal averages high 84 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with patchy fog this AM, and a slight (20%) chance of patchy AM drizzle, partly cloudy this afternoon and evening, cloudy with areas of fog and a slight (20%) chance of drizzle late tonight and Sunday AM, cloudy in the afternoon, partly cloudy in the evening, cloudy with patchy fog late Sunday night and Monday AM, then mostly cloudy Monday afternoon and Monday night highs near 62 lows near 55. Mostly cloudy Tuesday through Friday highs 67-62 lows near 57. (seasonal averages high 65 low 53).

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Forecast for the Cascades of Lane County: Partly cloudy with a slight (20%) chance of thunderstorms this afternoon, partly cloudy tonight through Sunday night, partly cloudy Monday with slight (20%) chance of thunderstorms in the afternoon and evening, then just partly cloudy Monday night free air freezing level 14,000 ft. today through Sunday, 15,000 ft. Sunday night, 13,000 ft. Monday, then 12,000 ft. Monday night highs 72-70 lows 49-46. Partly cloudy with a slight (20%) chance of thunderstorms Tuesday afternoon and evening, partly cloudy Tuesday night, partly cloudy with a slight (20%) chance of thunderstorms Wednesday afternoon and evening, then partly cloudy Wednesday night through Friday free air freezing level 12,000 ft. Tuesday through Wednesday night, 13,000 ft. Thursday, then 14,000 ft. Thursday night and Friday highs 70-72 lows near 47.

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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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