Moderate

* WHAT...Visibility one half mile or less at times in dense fog. * WHERE...Jerauld, Aurora, and Brule 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...Heat index values in excess of 105 degrees expected. * WHERE...Portions of central, east central, north central, and northeast Mississippi. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat related 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

* WHAT...Heat index values in excess of 105 degrees expected. * WHERE...Portions of central, east central, north central, southwest, and west central Mississippi. * WHEN...From noon today to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat related 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

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 6 feet expected. * WHERE...Northern Cook and Central Cook Counties. * WHEN...Until 3 PM CDT this afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 4 to 6 feet expected. * WHERE...Lake County IL. * WHEN...Through this evening. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

At 238 AM MDT, Doppler radar was tracking a strong thunderstorm near Fruita, or 9 miles northwest of Grand Junction, moving east at 35 mph. HAZARD...Wind gusts up to 50 mph and half inch 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... Grand Junction, Fruita, and Redlands. This includes Interstate 70 in Colorado between mile markers 20 and

* WHAT...High waves and dangerous currents expected. * WHERE...Beaches along Lake Michigan in Kewaunee and Manitowoc Counties. * WHEN...Through this evening. * IMPACTS...Dangerous swimming conditions are expected. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Several beaches that will be most susceptible to the dangerous swimming conditions include... Cresent Beach and City of Kewaunee Beach in Kewaunee County.

At 116 AM MDT, Doppler radar was tracking a cluster of strong thunderstorms 24 miles north of Castle Valley, moving northeast at 40 mph. HAZARD...Wind gusts up to 50 mph and half inch 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... Cisco. This includes the following highways... Interstate 70 in Utah between mile markers 201 and 222.

At 221 AM CDT, Doppler radar was tracking a strong thunderstorm over Rowley, or 9 miles southeast of Independence, moving east at 35 mph. HAZARD...Winds in excess of 40 mph and minor flooding. SOURCE...Radar indicated. IMPACT...Gusty winds could cause minor tree limb damage and blow around unsecured objects. Slowing or redirecting of traffic due to ponding or flowing water. Closure of waterfront access due to flooding. Locations impacted include... Independence, Manchester, Center Point, Urbana, Winthrop, Walker,

* WHAT...Heat index values up to 105. * WHERE...Prairie, White, Jackson, Lawrence, Monroe, Randolph, Woodruff, Independence, Sharp, and Arkansas Counties. * WHEN...Until 8 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