![]() ![]() Unhealthy for sensitive groups (101-150): Sensitive groups include kids people with asthma or heart disease and people who work or exercise strenuously outdoors. The MDEQ said the condition of Michigan’s air quality falls in the good and moderate categories most of the time Grand Rapids, Houghton Lake, Kalamazoo, Ludington and Saginaw all were higher. State meteorologists forecast pollutants including ground-level ozone and fine particulate and declare an “Action Day” when air quality levels are expected to reach or exceed various health levels.Here are the levels the state’s tracks, using a numerical scale:įor perspective, in late June, EGLE's air quality index website showed Lansing with a 199 rating. That exceeds the previous record set in 1989 of 75,596 square kilometers, according to the National Forestry Database.Ĭurrently there are 881 fires burning across the country, with 578 of them considered to be out of control.Ĭheck current conditions with these air quality maps:Īnd in Michigan and elsewhere here: How the air rating system works The Canadian Interagency Forest Fire Centre said 10 million hectacres (about 24 million acres) have burned this year. The alert urges reducing activities like burning wood or idling vehicles to help the air quality, along with running air conditioners at night and ideally with MERV-13 air filters. "It is recommended that active children and adults, and persons with respiratory diseases such as asthma, limit prolonged outdoor exertion," according to a National Weather Service alert. READ MORE: Air quality advisory extended to Wednesday because of smoke Air quality in Tecumseh is currently the worst in Michigan and is considered at the lower end of unhealthy for all groups, according to AirNow, a federal air quality tracker. But other Michigan sensors are showing air quality in Kalamazoo, Grand Rapids and Detroit that is ranging from moderate to unhealthy for sensitive groups. The smoke triggered air quality index alerts for Michigan, and the Michigan Department of Environment, Great Lakes, and Energy said the air quality in the Lansing area could be unhealthy for sensitive groups and could reach the level of being unhealthy for all groups.Īn air quality sensor in Lansing is not reporting current data, according to a federal tracker. Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall.LANSING - Smoke from fires in Canada continues to be evident throughout Greater Lansing, mimicking a summer fog in some communities. Hail is a good reflector of energy and will return very high dBZ values. These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values. The higher the dBZ, the stronger the rainrate. Typically, light rain is occurring when the dBZ value reaches 20. The scale of dBZ values is also related to the intensity of rainfall. ![]() The value of the dBZ depends upon the mode the radar is in at the time the image was created. Notice the color on each scale remains the same in both operational modes, only the values change. The other scale (near left) represents dBZ values when the radar is in precipitation mode (dBZ values from 5 to 75). One scale (far left) represents dBZ values when the radar is in clear air mode (dBZ values from -28 to +28). ![]() Each reflectivity image you see includes one of two color scales. The dBZ values increase as the strength of the signal returned to the radar increases. So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). "Reflectivity" is the amount of transmitted power returned to the radar receiver. The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. ![]()
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