Moderate

* WHAT...Visibility as low as one quarter mile or less in dense fog. * WHERE...Portions of Eastern Upper and Northern Lower Michigan. * WHEN...Until 11 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

At 231 AM CDT, Doppler radar was tracking an area of strong thunderstorms extending from over Mayer to 6 miles northwest of Faribault, or extending from 20 miles south of Buffalo to 6 miles northwest of Faribault, moving northeast at 45 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 damage to outdoor objects is possible. Locations impacted include...

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Manitowoc, Brown, Door, Kewaunee, Northern Marinette County, Northern Oconto County, Southern Marinette County, and Southern Oconto counties. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...High temperatures of 96 to 105 expected for most valley locations. Moderate to Major HeatRisk expected. * WHERE...Lake County, and Southeastern Interior Mendocino. * WHEN...From noon Thursday to 10 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses especially for those without cooling or hydration. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Heat index values up to 101 expected. * WHERE...Lenawee, Macomb, Monroe, Oakland, Washtenaw, and Wayne Counties. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

At 157 AM CDT, Doppler radar was tracking showers and thunderstorms along a line extending from 7 miles north of Mooreland to 10 miles south of Harmon. Movement was northeast at 40 mph. In addition, showers moving across eastern Beaver County with a history of producing strong winds will move east toward Harper County. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include...

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Ottawa, Lake, Mason, Muskegon, Newaygo, and Oceana Counties. * WHEN...Until 11 AM EDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Heat index values up to 100 expected. * WHERE...Calhoun, Jackson, Kalamazoo, and Van Buren Counties. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Heat index values around 100 expected. * WHERE...Portions of northern Indiana and southwest Michigan. * WHEN...From noon EDT /11 AM CDT/ today to 8 PM EDT /7 PM CDT/ this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning

* WHAT...Heat index values up to 103 expected. * WHERE...Portions of northern Indiana, southwest Michigan, and northwest Ohio. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning