Flames aren't always the greatest threat during a wildfire. Smoke can spread hundreds of miles from an active fire. This smoke can affect transportation, schools, healthcare facilities, outdoor events, and vulnerable populations. During major wildfire events, emergency managers need to monitor no only where the fire is actively burning, but where the smoke is moving. Combining weather observations, live weather cameras, forecasts, and air quality information providing a more complete picture for operational decision-making.
Wildfire smoke can impact areas from from the fire perimeter. The most obvious reason smoke monitoring matters is public health. Wildfire smoke is composed of fine particulate matter known as PM2.5. Because of their microscopic size, these particles can be inhaled deeply into the lungs and even pass into the bloodstream. The effects of exposure to PM2.5 can be relatively minor like eye or respiratory tract irritation to more serious things like worsening of asthma or even heart failure.
Visibility can also be greatly impacted by wildfire smoke. This can be especially dangerous when it combines with fog to create "super fog". Super fog is the combination of wildfire smoke and fog that can lead to zero visibility. Super fog has been responsible for numerous multi-vehicle crashes across the United States because drivers can encounter near-zero visibility with little warning. For emergency managers, monitoring weather conditions that contribute to super fog can improve transportation safety, support road closure decisions, and enhance public messaging. A deadly super fog event in New Orleans led the city to expand their Weatherstem network to help prevent future incidents from happening.
Wildfire smoke can limit the ability for outdoor workers to do their jobs, prevent schools from having outdoor sports and other activities, and can even impact shelters and hospitals.
Wind speed and direction are the meteorological conditions that most influence wildfire smoke. Wind speed will determine how quickly and far the smoke will travel while direction determines where it will go. Wind shifts can rapidly change the direction of smoke and lead to impacts far from where the flames are actually burning.
Atmospheric stability can also determine concentrations of wildfire smoke. An atmospheric inversion, which occurs when the temperature increases with height instead of decreases, causes a stable environment, trapping smoke at the surface and increasing its influence. This often happens in the overnight and morning hours, which is when many super fog events occur.
Meteorologists also monitor mixing height, which describes how deeply smoke can disperse into the atmosphere. Lower mixing heights often result in higher smoke concentrations near the surface, while higher mixing heights generally allow smoke to disperse more effectively.
There are several tools emergency managers can use to monitor wildfire smoke in real time. Together, weather observations, live weather cameras, air quality monitoring, and National Weather Service products provide a more complete picture of changing conditions.
One of the most effective ways to monitor wildfire smoke is through live weather cameras. Weatherstem weather stations equipped with live cameras provide visual confirmation that complements weather observations. Below is an example of a smoke plume captured by one of our weather stations in Gainesville, FL:
Combined with weather observations like wind speed and temperature, being able to visually see smoke plumes allows for better situational awareness.
Weather stations provide the data to go along with the visual confirmation of a smoke plume. Wind speed and direction, humidity, and temperatures are all important when monitoring wildfires and smoke plumes.
Air quality sensors that monitor the air quality index (AQI) complement weather observations by letting emergency managers know when particulate matter measurements get to dangerous levels. The scale is broken down into the following categories:
| AQI | Category | Operational Considerations |
| 0-50 | Good | Normal outdoor operations |
| 51-100 | Moderate | Monitor sensitive groups |
| 101-150 | Unhealthy for Sensitive Groups | Consider modifying outdoor activities |
| 151-200 | Unhealthy | Increased public messaging |
| 201-300 | Very Unhealthy | Significant operational impacts |
| 301-500 | Hazardous | Emergency protective actions may be necessary |
In addition to fire weather watches and red flag warnings, the National Weather Service (NWS) will issue smoke forecasts and air quality alerts. An example of an air quality alert is below:
Many operational decisions can be impacted by smoke, ranging from transportation decisions to school activities and public messaging.
Smoke can have a huge impact on transportation options. Dense smoke can reduce visibility, leading to road closures. It can also cause airport delays and ground planes and helicopters. Public transit closures due to smoke reducing visibility are also possible.
Educational institutions from K12 to College can also have their outdoor activities impacted by smoke. Poor air quality can prevent outdoor recess and cancel athletic events, especially if it gets to unhealthy levels.
Wildfire smoke can overwhelm health care centers by increasing patient loads due to respiratory issues. When combined with extreme heat like wildfires often are, cooling centers must also take into account the impacts from smoke. Long-term care facilities that house sensitive populations are especially vulnerable to the impacts of wildfire smoke.
When poor air quality is expected due to wildfire smoke, officials must make clear public messaging on best measures. Public messaging may include recommendations issued by local public health officials regarding outdoor activity, protective measures like masks, and other health guidance.
First responder safety must be taken into account during poor air quality events. First responders must have the correct safety equipment to handle working outdoors during wildfire smoke events. Reduced visibility can also impact the safety of first responder teams and in some extreme cases, can ground air rescue and even ground vehicles.
A good strategy for smoke monitoring by emergency managers would including the following:
Smoke monitoring should not rely on a single data source. Forecasts provide advance notice of potential impacts, weather stations monitor changing conditions, cameras provide visual confirmation, and air quality sensors measure the health impacts of smoke. Bringing these sources together into a shared dashboard gives emergency managers a common operating picture before and during wildfire incidents.
Smoke often affects communities far beyond the fire itself, creating operational challenges even where flames are not an immediate threat. By combining forecasts, weather observations, live weather cameras, and air quality information, emergency managers can better understand changing conditions, support informed operational decisions, and communicate risks before smoke begins affecting their communities.
Want to improve smoke monitoring and situational awareness during wildfire season? Weatherstem's weather stations, live cameras, and operational weather platform help emergency managers monitor changing conditions, visualize smoke movement, and support informed operational decisions. Contact Weatherstem to learn more: https://www.getweatherstem.com/contact-weatherstem
Emergency managers monitor wildfire smoke using a combination of weather stations, live weather cameras, National Weather Service forecasts, air quality sensors, satellite imagery, and shared operational dashboards. Together, these tools provide a more complete picture of changing smoke conditions.
Wildfire smoke can travel hundreds or even thousands of miles from its source. Fine particulate matter (PM2.5) in smoke can reduce air quality, impact public health, decrease visibility, and disrupt transportation, schools, and outdoor activities well outside the active fire area.
Wind speed and direction determine where smoke travels, while atmospheric stability and temperature inversions influence whether smoke remains trapped near the ground or disperses into the atmosphere. These conditions can change rapidly, making continuous weather monitoring important.
Live weather cameras provide visual confirmation of smoke movement, visibility, and changing conditions. When combined with weather observations such as wind speed and direction, cameras improve situational awareness and support operational decision-making during wildfire events.