At 829 PM EDT/729 PM CDT/, Doppler radar was tracking strong thunderstorms along a line extending from near Lake Michigan Beach to near Bridgman to near La Porte. Movement was east at 30 mph. HAZARD. Wind gusts up to 40 mph and pea size hail. SOURCE. Radar indicated. IMPACT. Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include. South Bend, Michigan City, La Porte, Niles, Benton Harbor, St. Joseph, Dowagiac, Westville, Buchanan, Trail Creek, Benton Heights, Fair Plain, Bridgman, North Liberty, New Buffalo, New Carlisle, Berrien Springs, Watervliet, Three Oaks, and Coloma. This includes the following highways. Interstate 196 between mile markers 0 and 7. Interstate 80 in Indiana between mile markers 38 and 77. Interstate 94 in Indiana between mile markers 36 and 45. Interstate 94 in Michigan between mile markers 0 and 42.

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.

* WHAT. Dangerously hot conditions for several days are expected. Peak afternoon heat indices around 100 degrees are likely each day from Monday through Friday. * WHERE. Southeast Michigan. * WHEN. From Monday afternoon through Friday evening. * IMPACTS. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS. The effects of heat on the human body get worse as the number of consecutive days of heat increase. Nighttime lows will only drop into the 70s this week, which will offer just modest relief from the heat. In addition, highs in the lower 90s may persist into the weekend.

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.

SVRGRR The National Weather Service in Grand Rapids has issued a * Severe Thunderstorm Warning for. Van Buren County in southwestern Michigan. Allegan County in southwestern Michigan. Ottawa County in southwestern Michigan. * Until 930 PM EDT. * At 823 PM EDT, severe thunderstorms were located along a line extending from 7 miles west of Holland SP to near Lake Michigan Beach, moving east at 30 mph. HAZARD. 60 mph wind gusts and penny size hail. SOURCE. Radar indicated. IMPACT. Expect damage to roofs, siding, and trees. * Locations impacted include. Holland. Allegan. South Haven. Paw Paw. Hudsonville. Zeeland. Hartford. Mattawan. Lawton. Bangor. Decatur. Fennville. Saugatuck. Van Buren SP. Allendale. Beechwood. Jenison. Holland SP. Lake Michigan Beach. Pine Grove.