GBUAPCD Air Blog

Dust and smoke issues in the Great Basin Unified Air Pollution Control District

Archive for September, 2014

King Fire smoke turns and settles in

Posted by admin on September 19, 2014

Here is a view from our webcam on Mazourka Peak.  Overnight, the wind directions changed from southerly to northerly, causing the smoke from the King Fire in El Dorado County http://inciweb.nwcg.gov/incident/4108 to drift down into the Great Basin valleys.  The fire grew over 5,000 acres since yesterday and is expected to grow 10,000 more acres by tomorrow.  The winds will be shifting again, so it is uncertain whether there will be an increase is smoke to our area over the weekend.  Below that is a chart of the PM2.5 for monitors in Lee Vining, Devil’s Postpile and Bishop Paiute Tribe.  PM10 monitors in Mammoth Lakes and Bishop have been added.  The PM2.5 at these sites would be slightly less, but they still provide a reasonable estimate.  The communities have dropped back down into the Moderate or even Good range.  (REFRESH THIS PAGE throughout the day today for updates on the chart).  Cautionary and health effect statements for the color-coded categories are available at http://www.gbuapcd.org/pm10.htm.  Newly available is a health guide for schools from the Oregon DEQ.  It uses the same color codes for wildfire smoke (see below).

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King Fire smoke data

Wildfire smoke school guide

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June Fire

Posted by admin on September 17, 2014

Update September 18, 2014:  Information on the June Fire can now also be found at: http://inciweb.nwcg.gov/incident/4115.

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Photo taken from Oh Ridge by Guy Davis, Air Monitoring Technician II for the Great Basin Unified APCD, just after noon today.

For information on the June Fire which started yesterday afternoon, September 16, 2014, see this announcement: June Fire 0917 am.  Updates and additional photos are posted on https://www.facebook.com/inyonf.  The smoke appears to be going upslope and lofting over the immediate community.  Transport winds are predicted to be in the south to southwest range.  Communities downwind should only be mildly impacted by the smoke.

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Meadow Fire satellite images and Lee Vining monitor

Posted by admin on September 10, 2014

Current information on the Meadow Fire in Yosemite can be found at http://yubanet.com/CAFires/Meadow.php and now http://inciweb.nwcg.gov/incident/4104.  Below are satellite images of the smoke plumes on the first day and then days later.  The fire’s intensity has dropped off considerably and wind patterns are keeping most of the smoke on the west side of the Sierra crest.  This pattern will last through the weekend, but we can still expect some of the smoke to spill over into Mono County and northern Inyo County.

Meadow Fire MODIS Pics

Yosemite National Park deployed a PM2.5 monitor to Lee Vining and there was an existing USFS one at Devil’s Postpile.  Below is a chart of the hourly data from both sites, which will be updated frequently.  Cautionary and health effect statements for the color-coded categories are available at http://www.gbuapcd.org/pm10.htm.

Meadow Fire EBAM data

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Meadow Fire makes run in Yosemite

Posted by admin on September 8, 2014

The smoke seen in the photo below is from the Meadow Fire in Yosemite National Park.  The image was captured at 4:30 PM Sunday, September 7, 2014, from the north end of June Lake Loop.Meadow Fire 9-7-2014

Details about the fire can be found at http://yubanet.com/CAFires/Meadow.php and at http://www.californiasmokeinfo.blogspot.com.  About 2,600 acres burned overnight since its discovery at 12:30 PM on Sunday, September 7, 2014.  The smoke seen here dispersed mostly north and slightly east.

The smoke is forecast to disperse in the same pattern this afternoon, Monday, September 8, 2014, as seen in the smoke-dispersion model image below.  Concentrations of particulate matter are predicted to be well below Great Basin APCD’s threshold of 100 ug/m3 for a stage 1 health advisory (see http://www.gbuapcd.org/healthadvisory/pressrelease.htm).Meadow smoke Sep-8-2014 PM

On September 9, 2014, the winds are predicted to shift to being from the northwest.  An updated version of the model now shows the smoke staying mostly on the west side of the Sierra crest.  Below is the model’s worst predicted hour for the afternoon/evening.

Meadow smoke Sep-9-2014 PM

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