Another Smoky/Dusty Sunrise: Could Keep Us Below 80 Degrees

7:30am Monday…

You’ve probably noticed the haze in the air the past 48 hours, especially Sunday.

OMPS_AI_over_VIIRS_RGB_na_2015_04_19

It’s smoke from fires in Siberia, with probably some dust thrown in too.  Here’s a detailed description from NESDIS (your tax dollars at work!):

A relatively expansive plume of smoke is capture in morning visible satellite imagery extending from southern Saskatchewan across central Montana, northern two-thirds of Idaho, Washington, Oregon, and northern California. This area of smoke (with a low probability of dust/sand mixed in) has been traced back to numerous large wildfires burning across Siberia. These fires produced pyrocumulus clouds that enabled the smoke to rise quickly and become entrained in the atmospheric jet stream. The first plume of smoke that has been since transported across the northern Pacific and is now located over the Pacific Northwest and southwestern to south-central Canada. Additional large detached smoke plumes were seen yesterday beginning to follow the same trajectory.

That was yesterday, but this morning the satellite image shows thick smoke over us once again.

Beijing also had their worst sandstorm in a decade from the same system that brought the strong winds across the border in Siberia:  http://ozoneaq.gsfc.nasa.gov/omps/blog/2015/04/worst-sandstorm-hit-beijing-over-decade

Cliff Mass blogged about this yesterday too:  http://www.cliffmass.blogspot.com/2015/04/siberian-smoke-reaches-northwest.html

For us, this means we have the hazy skies and slightly reduced heating from the sun.  A great example is from USFS RAWS sites.  This one from Mt. Wilson SE of Timothy Lake:  http://www.wrh.noaa.gov/mesowest/getobext.php?wfo=&sid=WSFO3&num=168&raw=0&dbn=m&banner=off

Look at the SOLAR RADIATION column and you’ll see the values each hour in Watts per Square Meter (W/m^2).  Notice on Friday and Saturday it is around 900-920 max, but then only around 830 yesterday, so maybe a 10% decrease in solar radiation reaching the ground.  That could be enough to chop a couple of degrees off the high and that COULD keep us below 80 again today.  Offshore flow is a bit weaker than I expected too…less than 2 millibars through the Gorge.

Nevertheless, a GREAT day again today with highs near 80…enjoy!

Chief Meteorologist Mark Nelsen

19 Responses to Another Smoky/Dusty Sunrise: Could Keep Us Below 80 Degrees

  1. Lee Wilson says:

    84 in Longview according to cars thermometer, 82 here in Castle rock..I hqvve pics to prove it if you want me to post lol.

  2. Tyler Mode in Battle Ground says:

    The smoke is making for nice sunrises and sunsets around here!

    This is last night:

  3. Brian Leroy says:

    Models are showing up to 3ft of snow for the Olympics and 2-3ft for the wa cascade during the next 10 days via wxbell less amounts for OR , either way the great news for our water supply.

  4. Boring Oregon says:

    Waste of tax dollars.

  5. W7ENK says:

    Oh great, here come all the warm weather weenies!

    I don’t care if it reaches 78 or 82 today, whatever the temperature ends up being, this warm sunshine feels GREAT!!! I just spent my lunch hour in Pioneer Square, and the weather is absolutely perfect. I sat in the square and ate a sandwich from across the street, I found my brick, I soaked up some of that 10% smoke screened sunshine, and all around I just enjoyed being outside. It’s hard to do all that when it’s 55 degrees and raining, so I’d much rather have this… 🙂

  6. Paul D says:

    Below 80 is a good thing. 20 below 80 would be really nice!

  7. Ted Berry says:

    The air here smelled like burning plastic yesterday, probably just all the contractors disposing of their waste before hitting the grind today. Those with too much greenhouse heat can put shade cloth on, or use exhaust fans and auto louvers.

    • Lee Wilson says:

      I have a blower running and well, a little late for the suncloth..And m. Hose broke.

    • Lee Wilson says:

      Forgot to mention we are at 77. And what is up with the baramoter calling for rain? Not a cloud in type sky save for all that smoke..is that entire country on fire ?

    • W7ENK says:

      Lee, during warm spells like this (more often in the summer), the barometric pressure drops during peak daytime heating. Warm air expands, and being less dense than cool air, it rises. Your sensor probably sees this pressure drop and interprets it as an incoming storm.

      Not all that uncommon really, it’s just the way these things work…

  8. Lee Wilson says:

    On the Plus side, my Pumpkins are loving this weather and arerecovering nicely.

  9. Lee Wilson says:

    I for one am thankful. it didn’t. hit 80°F.
    I don’t. need my greenhouses getting to hot.

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