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Event Year: Date:

200MB.gif  200MB Chart valid from Aug 30/06Z thru Sept 02/06Z showing westerly (zonal) flow aloft and a weak trough passing to the east.
500MB Absolute Vorticity.gif  500MB Absolute Vorticity chart valid from Aug 30/06Z thru Sept 01/06Z is similar to the 200MB chart, with few areas of vorticity evident.
500MB.gif  500MB chart valid from Aug 30/06Z thru Sept 02/06Z reflects 500MB AV chart.
700MB Vertical Velocity.gif  700MB Vertical Velocity chart valid from Aug 30/06Z thru Sept 02/06Z shows weak pressure gradient, localized areas of mixed vertical velocity
850MB.gif  850MB chart valid from Aug 30/06Z thru Sept 02/06Z shows low pressure in the Pacific west of Southern California and weak patterns in the desert southwest.
AIRNow AQI Peak O3.gif  AIRNow AQI Peak O3 valid from August 30th thru September 1st shows mostly Moderate ozone levels in Southern Nevada and unhealthy levels in California.
AIRNow AQI Peak PM.gif  AIRNow AQI Peak PM valid from AUgust 30th thru September 1st shows mostly moderate levels of Particulate Matter in central southern California and good conditions in the Las Vegas valley thru the period.
AIRNow AQI Peak.gif  AIRNow AQI Peak valid from August 30th thru September 1st shows Moderate AQI levels of both PM and ozone levels combined in southern California turning to USG with a few periods of very unhealthy, The Las Vegas area shows mostly moderate levels with periods of USG in the afternoon of day of exceedance.
AirNT.JPG  EPA AirNow Tech plot for August 31, 2017 showing smoke throughout the region and a dense plume for wildfires in the Sequoia National Forest near Bakersfield, CA
DAQ Air Quality Forecast.pdf  DAQ Air Quality Forecast Valid for August 31st shows moderate ozone levels expected on August 31st and for the remainder of the period.
DAQ Air Quality Index.jpg  DAQ Air Quality Index Valid for August 31st shows 4 sites that reached the Unhealty for Sensitive Group levels for Ozone: Green Valley, JD Smith, Paul Meyer and Walter Johnson.
DAQ Ozone Animation.gif  DAQ Ozone animation valid from August 31st 10:10 PDT thru 17:10 PDT shows the Las Vegas region moving into the moderate levels during the day, into USG for a period in the afternoon of the 31st.
DAQ Pollutant Hourly Average.jpg  DAQ Pollutant Hourly Averages valid for August 31st showing ozone, PM2.5 and PM10.
DAQ RAOB.gif  August 31st animation of hourly upper-air temperature and humidity profiles as skew-T/log-P diagrams, and the associated winds aloft profiles showing speed and direction as "wind barbs". Diurnal cycle of temperature profile with light winds are shown.
Hysplit.pdf  Trajectories leading to air present in Las Vegas on August 31, 2017 showing origins from nearby to the northwest at lower levels and the Sequoia National Forest with active wildfires
Summary.pdf  Summary of atmospheric conditions causing the ozone exceedance at four sites.
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