DES M Resort Visibility Camera.jpg  |
DES M Resort Visibility Camera pictures view to north and northeast on January 3 at 0730 and 1600 PST. High clouds were present, with indications of low-level haze. |
DES Air Quality Forecast.JPG  |
DES air quality forecast issued December 31 showing Moderate AQI levels of particulate matter (PM2.5 and PM10) occurring on January 3. The advisory for smoke related to fireworks had expired after January 1. |
AirNow Daily AQI.JPG  |
AirNow Daily Air Quality Index (AQI) map for particulate matter within about 300 miles of Las Vegas for January 3. Yellow colored areas are a Moderate AQI, and orange is Unhealthy for Sensitive Groups (USG). The Las Vegas area only shows Moderate AQI. |
DES Air Quality Index.jpg  |
DES Air Quality Index for each site in the DES network for January 3. The exceeding site, Sunrise Acres, is in the east-central portion of the Las Vegas valley. |
AirNow Hysplit.jpg  |
AirNow Hysplit trajectory plots for 20, 200 and 800 meters above ground level in Las Vegas arriving at 0700 and 1900 PST on January 3, showing little air movement in the lower levels. |
500MB.gif  |
Daily Weather Map 500 millibar synoptic chart for January 3, 2021 showing weak zonal flow aloft in the southwestern US. |
Summary.pdf  |
The 24-hour NAAQS for PM2.5 was exceeded on January 3 at Sunrise Acres with an AQI level of 112. This site is in the east-central portion of the Las Vegas valley. |
SFC.gif  |
Daily Weather Map surface synoptic chart for January 3, 2021 showing high pressure through the western US that corresponds to light winds and stable night hours. |