SMWGRR The National Weather Service in Grand Rapids has issued a * Special Marine Warning for. Nearshore and Open Waters from Holland to Whitehall MI. * Until 200 PM EDT. * At 1255 PM EDT, a strong thunderstorm was located 20 nm west of Grand Haven, moving east at 25 knots. HAZARD. Wind gusts 34 knots or greater and large hail. SOURCE. Radar. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. * Locations impacted include. The Muskegon Light, Grand Haven Light, and Port Sheldon Harbor.

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/

For the following areas. Nearshore and Open Waters from Grand Haven to Whitehall MI. At 125 PM EDT, a strong thunderstorm was located near Mona Lake Channel, moving northeast at 30 knots. HAZARD. Wind gusts to 40 knots and small hail. SOURCE. Marine weather station. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. The strong thunderstorm will affect Mona Lake and Muskegon Lake.

* 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.