At 802 PM EDT, Doppler radar was tracking strong outflow winds from scattered thunderstorms extending from 20 miles west of Saugatuck to 9 miles northwest of Benton Harbor. Movement was northeast at 40 mph. These storms have a history of producing 40 to 45 mph wind gusts in the Chicago area. Areas that do not receive a thunderstorm may still see the strong wind gusts. HAZARD. Winds in excess of 40 mph and pea size hail. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include. Muskegon. Holland. Grand Haven. Allegan. South Haven. Paw Paw. Muskegon Heights. Hudsonville. Zeeland. Coopersville. Wayland. Otsego. Roosevelt Park. Plainwell. North Muskegon. Ferrysburg. Whitehall. Hartford. Montague. Spring Lake.

* WHAT. Dangerously hot conditions with heat index values up to 100 possible. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has declared an Air Quality Advisory for Monday, June 17, for elevated levels of ozone in parts of southwest Michigan. Pollutants within those areas are expected to be in the Unhealthy for Sensitive Groups (USG, Orange AQI) range. The Air Quality Advisory is in effect for the following counties in southwest Michigan. Berrien and Cass Temperatures and humidity will continue to increase as we begin the new week. Temperatures in the 90's and dewpoints around 70 degrees will add to the misery index for the week. This pattern looks to persist through the week. With winds at all levels of the atmosphere coming from the hot southwest, Air Quality will certainly be an issue, this week. With conditions not expected to change, drink plenty of fluids, stay in an air-conditioned room, stay out of the sun as much as possible, and check up on relatives and neighbors. It is recommended that, when possible, you avoid strenuous outdoor activities, especially those with respiratory diseases such as asthma. People and businesses are urged to avoid activities which lead to ozone formation. These activities include: * refueling vehicles or topping off when refueling; * using gasoline powered lawn equipment; * using charcoal lighter fluid. Positive activities include: * driving less; * telecommuting; * and delaying or combining errands. For further information, please see EPA's Air Now site for up-to- date air quality data: https://www.airnow.gov/

The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has declared an Air Quality Advisory for Monday, June 17 for elevated levels of ozone in West Michigan. Pollutants within those areas are expected to be in the Unhealthy for Sensitive Groups (USG, Orange AQI) range. The Air Quality Advisory is in effect for the following Michigan counties: ALLEGAN. KENT. MUSKEGON. OCEANA OTTAWA MASON AND VAN BUREN COUNTIES It is recommended that, when possible, you avoid strenuous outdoor activities, especially those with respiratory diseases such as asthma. People and businesses are urged to avoid activities which can lead to ozone formation. These activities include: refueling vehicles or topping off when refueling; using gasoline powered lawn equipment; using charcoal lighter fluid. Positive activities include: driving less; telecommuting; walking or bike riding; delaying or combining errands; using water-based paints. For further information, please see EPAs Air Now site for up-to-date air quality data: https://www.airnow.gov/

* WHAT. Dangerously hot conditions with heat index values around 100 degrees. * WHERE. Portions of northern Indiana, southwest Michigan and northwest Ohio. * WHEN. From Monday morning through Friday evening. * IMPACTS. Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. A lack of cooling overnight will increase impacts on the body as well for those lacking sufficient means of cooling. * ADDITIONAL DETAILS. Heat indices into the mid to upper 90s are possible next weekend beyond the time of the watch. The prolonged nature of the event may magnify impacts as we move into the latter portions of the week. In addition, widely scattered showers and storms Monday and Tuesday could limit the heat impacts in some areas.

SVRIWX The National Weather Service in Northern Indiana has issued a * Severe Thunderstorm Warning for. Berrien County in southwestern Michigan. * Until 930 PM EDT. * At 844 PM EDT, a severe thunderstorm was located over Three Oaks, or 10 miles west of Buchanan, moving northeast at 30 mph. HAZARD. 60 mph wind gusts and quarter size hail. SOURCE. Radar indicated. IMPACT. Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include. Niles, Buchanan, Berrien Springs, Three Oaks, Shorewood-Tower Hill, Shorewood-Tower Hills-Harbert, Dayton, Baroda, Eau Claire, Galien, Union Pier, Glendora, New Troy, Harbert, Sawyer, Turner Shores, and Lakeside In Berrien County. This includes Interstate 94 in Michigan between mile markers 4 and 13.

At 901 PM EDT, severe thunderstorms were located along a line extending from near Berrien Springs to near Three Oaks, moving northeast at 30 mph. HAZARD. 60 mph wind gusts and nickel size hail. SOURCE. Radar indicated. IMPACT. Expect damage to roofs, siding, and trees. Locations impacted include. Niles, Buchanan, Berrien Springs, Three Oaks, Dayton, Eau Claire, Galien, Glendora, and New Troy.