As wildfires continue to burn on the west Coast of the United States and western Canada, many in New England and surrounding areas have noticed hazy skies today and, at times, even the smell of smoke in the air. The picture above was taken in Bridgewater, NH in the afternoon with smoky skies clearly visible. While the wildfires themselves may be thousands of miles away, their effects can be felt right here at home due to the transport of smoke by upper-level winds.
When wildfires burn, they release large amounts of smoke and fine particulate matter into the atmosphere. This smoke can travel long distances, often carried by high-altitude winds. While much of the smoke remains aloft in the upper atmosphere, where it creates hazy skies and vivid sunsets, certain atmospheric conditions can cause the smoke to mix down to the surface.
Under specific conditions, such as strong surface winds, temperature inversions, or changes in air pressure, the smoke can be drawn downward, mixing with the air we breathe. When this happens, you may notice a distinct smell of smoke, reduced visibility, and even a noticeable decline in air quality. This can be concerning, especially for those with respiratory issues, the elderly, and young children.
When wildfire smoke mixes down to the surface, it can lead to elevated levels of fine particulate matter (PM2.5), which are tiny particles that can penetrate deep into the lungs. Exposure to high levels of PM2.5 can cause respiratory irritation and exacerbate conditions like asthma, bronchitis, and other lung diseases.
Areas of wildfire smoke will continue to slide through eastern Canada to New England through midweek, though most of it will be light to moderate. Some pockets of smoke may be able to mix down to the surface Wednesday into Thursday, particularly in eastern New England, so don’t be surprised if you smell smoke at times.
