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The Week Ahead: Cold and Snow Repeat

Posted: December 12th, 2016

  Forecast Summary Similar pattern to last week… • No NWS advisories in effect; however King Tides are this week. • Diminishing shower activity today, possible rain/snow convergence zone event this afternoon. • Cold and dry tomorrow and Wednesday. • Light snow/rain possible on Thursday/Friday. • Extended forecasts suggest near normal conditions.   Water Supply […]

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Warmest November

Posted: December 7th, 2016

    A stat largely lost in the shuffle toward early December snow is that SeaTac’s average temperature last month was 50.87 degrees. That’s its warmest November since records began there in 1949 (Downtown Seattle averaged 51.9 degrees in November 1899).   9 out of SeaTac’s 12 warmest all-time months have occurred this decade. 8 […]

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The Week Ahead: Showery and Cool

Posted: November 14th, 2016

  Forecast Summary • Diminishing shower activity today, convergence zone possible to the north. • A series of systems will provide additional showers through Wednesday. • Drier and cooler conditions are expected late Wednesday through early Friday. • Extended forecasts suggest a wet weekend and showery conditions beyond.   Water Supply • Last 7-days precip […]

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Weekly Rainfall Review

Posted: November 14th, 2016

  Last Monday’s forecast summary: • Light rain ending this morning. • Near-record high temps are expected to peak in the mid-60s tomorrow. • Steady rain is likely again on Friday. • Extended forecasts have 4-5 systems, none appearing strong, arriving over the next 2 weeks.   The 7-day precipitation forecast called for 1- to […]

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The Week Ahead: Relatively Dry and Warm

Posted: November 7th, 2016

  Forecast Summary • Light rain ending this morning. • Near-record high temps are expected to peak in the mid-60s tomorrow. • Steady rain is likely again on Friday. • Extended forecasts have 4-5 systems, none appearing strong, arriving over the next 2 weeks.   Water Supply • Last 7-days precip: 2.5″ – 4.3″ • […]

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Weekly Rainfall Review

Posted: November 6th, 2016

  Last Monday’s (Halloween) forecast summary: • A few showers with wind today and tomorrow. • Somewhat steadier rain is likely late Wednesday into Thursday. • More substantial rain is possible by the weekend. • Extended forecasts suggest continued wet conditions.   The 7-day precipitation forecast called for 2.5- to 4.0-inches across the Tolt and […]

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Record October Review

Posted: November 3rd, 2016

October 2016 was the wettest October ever recorded in Seattle. 10.05 inches fell at Sea-Tac, which is 1.09 inches more than the previous record (2003) and 6.57 inches more than normal. Coincidentally, 6.57 inches is normal rainfall for November, so two months of rain fell in one.   It was only the tenth time that […]

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The New New Normal

Posted: August 1st, 2016

    Back on the fifth of July, the temperature in Seattle only reached a high of 67 degrees. Seven degrees cooler than normal, it was the coolest day in weeks. (It would end up being the coldest day of the month.) Headlines and hashtags cried “Jul-tober” as if it somehow resembled October’s 53-degree average. […]

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The Wettest Wet Season

Posted: March 31st, 2016

  Over the course of a “normal” year, 37.49 inches of rain falls in Seattle (Sea-Tac). Since the first of this January, we’ve received 18.49 inches. That’s an impressive 150 percent of where we’re supposed to be on this date, the final day of March.   But if you go back to the start of […]

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Relentless Rain

Posted: December 9th, 2015

    Last Monday forecast discussions started using the old, reliable word “active” to describe the then developing pattern. When we see that term it usually means that the jet stream is in our hemispheric vicinity and it will deliver us a series of systems. Also last Monday medium-range forecast models suggested that an atmospheric […]

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