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Jul

15.

Look for the possibility of a shower or thunderstorm for the first half of the workweek.

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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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A closed low (brown circle) will slide south from Canada bringing us more clouds as it moves through, but I don’t think we’ll see any significant precipitation just a chance of a shower or thunderstorm. A frontal system will swing in Wednesday, again bringing only clouds and not a significant chance of precipitation. We will dry out and warm u as we head into next weekend.

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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: Partly cloudy tonight, a mix of clouds and sun with a slight (20%) chance of thunderstorms Monday afternoon and evening, partly cloudy with a slight (20%) chance of showers late Monday night and Tuesday AM, a mix of clouds and sun with a slight (20%) chance of thunderstorms Tuesday afternoon and evening, then a slight (20%) chance of showers late Tuesday night, a mix of clouds and sun with a slight (20%) chance of showers Wednesday, then partly cloudy Wednesday night lows 50-56 cooling to 52 Wednesday night highs 75-77. Partly cloudy Thursday through Saturday AM, mostly sunny Saturday and Sunday, and mostly clear Saturday night highs 80-86 lows near 54. (seasonal averages high 82 low 52)

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Forecast for the Umpqua Basin including Roseburg: Mostly clear this evening, mostly cloudy tonight, cloudy Monday AM, partly cloudy Monday afternoon, partly cloudy with a slight (20%) chance of thunderstorms Monday evening, a slight (20%) chance of showers late Monday night, mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Tuesday and Tuesday evening, a (40%) chance of showers late Tuesday night, mostly cloudy with a (30%) chance of showers Wednesday AM, mostly cloudy Wednesday afternoon and evening, then partly cloudy Wednesday night lows 54-60 cooling to 54 Wednesday night highs near 78-74 warming to 80 Wednesday. Partly cloudy Thursday through Friday night, partly cloudy and warmer Saturday, mostly clear at night, then mostly sunny Sunday highs 78-89 cooling to 87 Sunday lows 55-58. (seasonal averages high 84 low 56)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, cloudy with patchy fog and drizzle late tonight and Monday AM, mostly cloudy Monday afternoon, partly cloudy in the evening with a slight (20%) chance of evening coastal thunderstorms and a slight (20%) chance of showers late Monday night, partly cloudy with a slight (20%) chance of inland evening thunderstorms and mostly cloudy with a slight (20%) chance of showers late Monday night, mostly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms Tuesday, a slight (20%) chance of inland evening thunderstorms and a (30%) chance of showers late Tuesday night, with a (30%) chance of coastal showers late Tuesday night, mostly cloudy with a slight (20%) chance of showers Wednesday AM, then just mostly cloudy Wednesday afternoon and Wednesday night lows 52-58 highs 64-62 warming to 66 Wednesday. Mostly cloudy Thursday AM, partly cloudy in the afternoon, mostly cloudy Thursday night through Saturday, then partly cloudy Saturday through Sunday highs near 65 lows 56-53. (seasonal averages high 65 low 53).

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Forecast for the Cascades of Lane County: Partly cloudy tonight, partly cloudy with a slight (20%) chance of thunderstorms Monday afternoon and evening, a slight (20%) chance of showers late Monday night, mostly cloudy Tuesday with a slight (20%) chance of AM showers, a slight (20%) chance of afternoon and evening thunderstorms, then partly cloudy with a (30%) chance of showers and a slight (20%) chance thunderstorms late Tuesday night, a (30%) chance of showers Wednesday AM, a mix of clouds and sun with a slight (20%) chance of thunderstorms in the afternoon and evening, then a slight (20%) chance of showers late Wednesday night free air freezing level 14,000 ft. tonight, 11,000 ft. Monday, snow level above 8,000 ft. Monday night through Wednesday night lows 44-48 cooling to 43 Wednesday night highs 64-60 warming to 64 Wednesday. Partly cloudy with a slight (20%) chance of showers Thursday and Thursday evening, partly cloudy Thursday night through Saturday AM, mostly sunny Saturday afternoon and Sunday with mostly clear skies Saturday night snow level above 8,000 ft. Thursday and Thursday night, free air freezing level 13,000 ft. Friday, 14,000 ft. Friday night 13,000 ft. Saturday, 14,000 ft. Saturday night, then 15,000 ft. Sunday highs 67-77 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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