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Event Year: Date:

200MB.gif  200MB animation valid from 10/12Z to 13/12Z Aug in 6-hour increments. Data shows riding over SW US with PFJ outlining Trof that moving/digging over N CA/NW NV through the period, weakening ridge.
500MB Absolute Vorticity.gif  500MB Absolute Vorticity animation valid from 10/12Z to 13/12Z Aug in 6-hour increments. An Easterly Wave moves into S NV early on 12 Aug and remains over the area through the end of the period.
500MB.gif  500MB animation valid from 10/12Z to 13/12Z Aug in 6-hour increments. Strong High over Ctrl NV shifts E towards the NV/UT border on 11/12Z Aug as Trof digs over NW US. H looks to stay in that general area but weaken through the period.
700MB Vertical Velocity.gif  700MB Vertical Velocity animation valid from 10/12Z to 13/12Z Aug in 6-hour increments. Data shows a strong area of downward vertical velocities over the area on 12 Aug as area is on the backside of the E Wave. Otherwise, all vertical velocities around our area but not over it.
850MB.gif  850MB animation valid from 10/12Z to 13/12Z Aug in 6-hour increments. Animation shows light SE-SW flow with stronger winds 12/06Z Aug at 10-15kts over the Las Vegas Valley.
AirNow AQI Animation 11.gif  AirNow AQI Animation 11 valid for 11 August. The animation shows a large area of an AQI of Unhealthy for Sensitive Groups developed over S CA which extends over S NV and merges with another area that forms to the NW of Las Vegas. The area affecting Las Vegas formed between approximately 3:00pm to 10:00pm PDT.
AirNow AQI Animation 12.gif  AirNow AQI Animation 12 valid for 12 August. The animation shows an area of an AQI of Unhealthy for Sensitive Groups developed to the NW of Las Vegas between approximately 2:00pm to 5:00pm PDT.
AirNow Hysplit.jpg  AirNow Hysplit data is valid for 11/1600 PST and 12/1200 PST Aug. This product is a backward trajectory of wind flow for the selected time period going back 24hrs. Data for both valid times indicate a S flow into S NV. Note: AirNow Hysplit Smoke Analysis is was not updated for these times.
AIRNow Peak AQIs.jpg  AirNow Peak AQIs valid for the 11 and 12 August. For 11 Aug, data depicts an ozone area in the Unhealthy for Sensitive Groups (USG) from Las Vegas extending to W and into S CA. For 12 Aug, data depicts an ozone USG area to the NW-NE of Las Vegas. As for PM, a Moderate area is over S NV on both days as smoke was trapped in S NV.
DAQ Advisory.pdf  DAQ Advisory which was issued on 9 August and valid for 9-13 August. The advisory was for the continued transport of smoke into the area resulting in the forecasted elevated levels of smoke from the CA wildfires and ozone.
DAQ Air Quality Index.jpg  DAQ Air Quality Index data valid for 11 and 12 August. The data shows the Air Quality Rating for each site in the DAQ network for the valid time specified. The following sites exceeded the Federal Standard for pollutant reaching the Unhealthy for Sensitive Groups level for ozone: On 11 Aug, Paul Meyer, Walter Johnson, and Jean (AQI 104) and Green Valley (AQI 101); Joe Neal and Indian Springs (AQI 100) were close to exceeding. On 12 Aug, Apex (AQI 101); Joe Neal (AQI 100) was close to exceeding.
DAQ Forecast.jpg  DAQ Forecast issued on 9 August and valid from the 10 to 14 August. The forecast call for a forecasted AQI in the Unhealthy for Sensitive Groups level ozone from 10 to 13 Aug and Moderate level for smoke for the period with continued wildfire smoke transport into Las Vegas.
DAQ Meteorological Hourly Averages 11.jpg  DAQ Meteorological Hourly Averages 11 valid for 11 August. This set of data is reported by the DAQ sites and includes resultant wind speed and direction, maximum gusts, and temperature. Data indicates winds were light S-W morning winds before shifting to SE-SW afternoon winds over Las Vegas. Additionally, relative humidity was higher than normal.
DAQ Meteorological Hourly Averages 12.jpg  DAQ Meteorological Hourly Averages 12 valid for 12 August. This set of data is reported by the DAQ sites and includes resultant wind speed and direction, maximum gusts, and temperature. Data indicates morning light, variable winds shifting in the afternoon to E-SW winds over Las Vegas. Relative humidity remained higher than normal on this day, too.
DAQ Pollution Hourly Averages 11.jpg  DAQ Pollution Hourly Averages 11 valid for 11 August showing hourly averages for Ozone, PM2.5, and PM10. Data shows peak ozone readings rising at or above the Unhealthy for Sensitive Groups (USG) level between the afternoon to early evening within the Vegas Valley. As for Particulate Matter (PM), AQI readings reached the Moderate level with high concentrations of smoke in the Vegas Valley.
DAQ Pollution Hourly Averages 12.jpg  DAQ Pollution Hourly Averages 12 valid for 12 August showing hourly averages for Ozone, PM2.5, and PM10. Data shows peak ozone readings rising at or above the Unhealthy for Sensitive Groups (USG) level between the late-morning to late afternoon within the Vegas Valley. As for Particulate Matter (PM), AQI readings for PM2.5 reached the lower end of the Moderate level as some of the smoke was ventilated out of the Vegas Valley.
DAQ Visibility Camera M Resort.jpg  DAQ Visibility Camera M Resort valid for 11 and 12 August. These sets of pictures are a view of the surrounding Vegas Valley taken during the afternoon hours from atop the M Resort. The pictures clearly show the thick smoke around the Vegas Valley.
NWS Forecast Discussion.pdf  NWS Forecast Discussion valid for August 10/0337AM PDT to 13/0917AM PDT. This NWS product discusses and updates forecasted and current conditions for our area. Discussion was mainly about weekend thunderstorms with High to our N. Outlook was for a ridge to our W by Sunday which was to shift to the E by Monday. Winds were expected to be light, variable to NE-E in the morning before shifting to a SE-SW afternoon wind flow. There was no mention of the smoke trapped in the Vegas Valley for the period.
NWS Observations.pdf  NWS Observations valid from 10 to 13 August reported out of McCarran. During this period, cloud conditions were partly to cloudy with high temperatures and higher than normal relative humidity. On 11 Aug, morning to afternoon winds were SE-SW with some afternoon gusts as high as 20kts. Did have some evening Thunderstorms with stronger evening gusts 50-60s. On 12 Aug , morning to afternoon winds were NE-SW with afternoon gusts as high as low 20s.
SFC.gif  SFC animation valid from 10/12Z to 13/12Z Aug in 12-hour increments. Animation shows a predominant light SE-SW wind with stronger afternoon winds on 10/00z and 13/00Z.
Smoke Analysis NASA.jpg  Smoke Analysis NASA for 11 to 12 August. This product is a smoke analysis depicting smoke over the W US. Pictures depicts smoke from a light blue shade to a yellow one. On 11 Aug, there is widespread smoke over all of NV extending into S CA, W UT, E OR, and SW ID. By 12 Aug, smoke over NV has ventilated out and is patchy over S CA/S NV and smoke has moved towards SW AZ.
Summary.pdf  On 11 August, smoke continued to be all over NV but strong evening thunderstorm outflows combine with PAC Trough to help clear and cut off smoke transport for 12 August. With limited smoke on 12 August, only one site exceeded the Federal Standard for pollutant as compared to four sites exceeding on 11 August.
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