I was enjoying a great hike under blue skies and cotton ball clouds in Yosemite National Park’s high country, one of my favorite places to go to enjoy amazing scenery, clear alpine lakes, and a bit of solitude.
After a lakeside lunch break, I noticed clouds of smoke coming in from the southeast. By early afternoon the smoke was so thick it obscured the sun.
I did not know it at the time, but the Creek Fire (which had started the previous evening) had “blown up” earlier in the day as I began hiking. Located about 45 miles away, it rapidly grew in size sending smoke tens of thousands of feet into the air, forcing evacuations, and threatening several communities. It was yet another devastating fire in what was already an unprecedented fire season in California.
The impact of any fire is not limited to those in close proximity to the active perimeter, but can extend hundreds of miles to far away communities where smoke impacts air quality conditions. For example, Bishop, California, is approximately 55 miles away from the Creek Fire as the crow flies, on the opposite side of the Sierra Nevada range. According to the NowCast Air Quality Index, that afternoon in Bishop the air quality was rated hazardous due to the smoke.
Make a smoke and air quality map
ArcGIS Living Atlas of the World includes authoritative live feeds and other content that helps you learn more about current and predicted smoke conditions and current air quality. Follow these steps to make your own smoke, fire, and air quality map in a minute.
Step 1 — Sign in to your account and open Map Viewer, click Add, then Browse Living Atlas Layers.
Step 2 — Enter “smoke” in search to locate matching layers from the Living Atlas. Locate the National Weather Service Smoke Forecast layer and click (+) to add it to the map.
Tip: To learn more about any layer, click the layer title to view the item details.
From the National Weather Service Smoke Forecast item details we learn that the data is sourced from the National Digital Guidance Database (NDGD). The time enabled layer displays projected visible smoke across the contiguous United States for the next 48 hours in 1 hour increments. It is updated every 24 hours by NWS. Concentrations are reported in micrograms per cubic meter.
Step 3 — Enter “air quality” in search and locate the AirNow Air Quality Monitoring Site Data (Current) layer and click (+) to add it to the map.
From the AirNow Air Quality Site Data (Current) item details we learn that the source is the United States Environmental Protection Agency (US EPA) and is updated hourly.
The smoke and air quality map
In just a few clicks a map showing smoke and air quality has been created.
Since the National Weather Service Smoke Forecast layer is time-enabled, a time slider appears at the bottom of the map. Using the time slider you can (a) play or pause the animation, (b) step forwards or backwards in time intervals, or (c) adjust time settings to set the playback speed, time span, and time display.
Click smoke polygons to learn more about the smoke forecast.
Click air quality stations to learn more about current conditions.
Improve your map
Experiment with different basemaps to see which you like best. You can alter layer transparency and symbols to emphasize the content you want. Add additional layers, such as USA Current Wildfires, Satellite (VIIRS) Thermal Hotspots and Fire Activity, or Current Weather and Wind Station Data to add additional context.
For more information, see Map a fire using ArcGIS Online and ArcGIS Living Atlas.
You can make a smoke forecast and air quality map using authoritative live feed sources from ArcGIS Living Atlas in just a minute. Use one of the configurable app templates to create an application that can be used by anyone in just a few more clicks.
For more information, see the following:
- ArcGIS Living Atlas website
- ArcGIS Living Atlas air quality content
- View time maps
- Configure time settings
- The air we breathe