October 15, 2009

Heavy Precipitation


Just a brief heads up about fairly heavy precipitation that will hit on Friday and Saturday. Take a look at the latest high-resolution (4 km WRF) 24h precipitation ending Friday and Saturday at 5 PM. A plume of moisture associated with a Pacific front will slowly move southward over the region. Black indicates 2-5 inches over 24h. Both the SW Olympics and the central Cascades get hit fairly hard. This is NOT equal to one of the major pineapple express events, but the first major mountain rains of the season.

The Green River watershed will get significant rainfall from this event. Nice rainshadow NE of the Olympics. The front moves through later on Saturday and Sunday bringing showers and a strong convergence zone north of Seattle. More later--have to teach 101 now.

I am canceling my hike on Saturday! Time to head to Sequim.
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10 comments:

  1. RLLOctober 15, 2009 at 10:28 AM

    Anybody out there: Where do I find the legends for these weather maps?

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  2. soggydanOctober 15, 2009 at 11:14 AM

    The legend is on the map. its a color gradation of 1/100ths of an inc h

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  3. Ian BarclayOctober 15, 2009 at 2:58 PM

    So far this week in Sequim, we've only had a trace of rainfall. Earlier rains (Labor Day weekend etc.) didn't amount to much, and the ground is still bone dry. We did have heavy winds on Tuesday though. There was more blowing dust/needles/leaves than I've ever seen here, and a mountain ash tree in our yard blew down.

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  4. mainstreeterOctober 15, 2009 at 9:44 PM

    This comment has been removed by the author.

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  5. mainstreeterOctober 15, 2009 at 9:46 PM

    weird weather year



    hard frost in over 30 years hits wine country

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  6. JoshOctober 15, 2009 at 10:25 PM

    Any idea if the rain will be that bad Saturday night in federal way? Planning on going to wild waves fright fest.

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  7. JoshOctober 16, 2009 at 7:07 AM

    looks like nice rain shadow in Bellingham as well..

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  8. RLLOctober 16, 2009 at 9:17 AM

    Dan - All of the initials at the top.

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  9. swerverOctober 16, 2009 at 10:07 AM

    I'm a newcomer to this blog, so forgive my ignorance, but why the random color scheme on the map? Why not the usual orderly transition of colors? Looking at this map, it is not intuitive at all which areas are getting more rain to someone who hasn't memorized that black is more than blue or purple, but not more than red, and so on. Other than that, really like the info, thanks.

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  10. mainstreeterOctober 16, 2009 at 5:21 PM

    Thunderstorm moving through Olympia this afternoon

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