Smoke From Los Angeles-Area Wildfires Makes its Way into Puget Sound Region (Images)
SEATTLE — Here we go again?
The skies over Seattle were a bit of a hazy orange Saturday evening… reminiscent of the smoky days of this summer when it seemed no matter which way the wind was blowing, there was smoke from a wildfire either to our north, east or south to push into our region.
But as University of Washington Atmospheric Sciences professor Cliff Mass points out, it seems even smoke two states away can still find its way into our region.
Los Angeles Smoke Reaches the Northwest http://dlvr.it/Q5Bd1H
As a huge ridge of high pressure along the West Coast brings southerly winds aloft, it has carried the smoke from southern California up the entire West Coast and into the Pacific Northwest.
Mass pointed out you can see it on the raw satellite image:
NASA MODIS satellite shows wildfire smoke in Southern California making its way all the way up to the Pacific Northwest (h/t @CliffMass )
And he showed a nifty model run showing the smoke coming up here from Southern California:
HRRR Smoke model also shows how smoke from SoCal fires is heading north amid massive West Coast ridge: (h/t @CliffMass )
Just like it did during the summer, the smoke is making for colorful sunrises and sunsets as the smoke scatters the sunlight into deep reds and oranges:
Kind of a crazy hazy sunset tonight along Seattle’s waterfront tonght. Squid fishermen enjoying it
The air quality wasn’t all that great in the Puget Sound region Saturday evening, but that is more likely due to the strong inversion that is trapping pollutants near the ground.
Air quality reaches moderate (yelllow) and unhealthy for sensitive groups (orange) Saturday evening due to the strong inversion. (Latest map here: https://secure.pscleanair.org/AirQuality/NetworkMap …)
With much warmer air aloft and cold air near the ground from nighttime cooling, it creates an invisible lid that doesn’t allow our pollutants to disperse. Sure enough, a Stage 1 Burn Ban is in effect for Snohomish and Pierce Counties. Mass says the inversion and stagnant mixing pattern does have a benefit in keeping the smoke from reaching the lower levels.
Source: http://www.desdemonadespair.net/2017/12/smoke-from-los-angeles-area-wildfires.html
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