Moderate

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of northern and western North Dakota. * WHEN...Until noon CDT /11 AM MDT/ today. * IMPACTS...Low visibility will make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

At 934 AM CDT, Doppler radar was tracking a strong thunderstorm over Watertown, moving east at 40 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Brookfield, Menomonee Falls, Watertown, Hartford, Pewaukee, Sussex, Hartland, Delafield, Jackson, Slinger, Germantown, Okauchee Lake, Oconomowoc, Lisbon, Merton, Johnson Creek, Butler, Lannon, Lac La Belle, and Richfield.

* WHAT...Heat index values up to 110 expected. * WHERE...Portions of southeast Arkansas, northeast Louisiana, and central, east central, north central, northeast, northwest, south central, southwest, and west central Mississippi. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Periods of dangerous heat will continue into this weekend. Drink plenty of fluids, stay in an air-conditioned room, stay out of

At 923 AM CDT, Doppler radar was tracking a strong thunderstorm over Sun Prairie, moving east at 40 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Eastern Madison, Sun Prairie, Middleton, Waunakee, Windsor, Lake Mills, Marshall, Waterloo, Deforest, Cottage Grove, Maple Bluff, Milford, Dane, Reeseville, Deansville, East Bristol, Morrisonville, Hubbleton, and Token Creek.

At 1029 AM EDT, a strong thunderstorm was located over Newport, moving east at 25 mph. HAZARD...Wind gusts up to 45 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Sidney, Piqua, Versailles, Newport, Hardin, Webster, Russia, Fletcher, Port Jefferson, Lockington, Polo, Newbern, Bloomer, Ballou, Plattsville, Willowdell, Pemberton, and Houston. This includes I-75 in Ohio between mile markers 80 and 96.

At 1003 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Flat Rock to Ida to 6 miles east of Morenci. Movement was southeast at 40 mph. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Strong thunderstorms will be near... Monroe, Flat Rock, Carleton, Temperance, and Ottawa Lake around 1010 AM EDT. Luna Pier and Lambertville around 1015 AM EDT.

* WHAT...Heat index values of 100 to 105. * WHERE...Portions of northwest Illinois and east central and northeast Iowa. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Thunderstorms and storm outflow may interrupt the heat at times. 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...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...Puerto Rico and the US Virgin Islands. * WHEN...Until 5 PM AST this afternoon. * IMPACTS...High temperatures or elevated heat indices can worsen symptoms in people with chronic conditions. They can also increase the risk of heat-related illness among individuals sensitive to heat with inadequate cooling or hydration. These risks are highest

* WHAT...Heat index values up to 103. * WHERE...Portions of northeast Kentucky, southeast Ohio, and central, northern, southern, and western West Virginia. * WHEN...Until 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. Additional information can be found at https://www.weather.gov/rlx as well as on our X and Facebook pages.

* WHAT...Heat index values of 105 to 109 degrees. * WHERE...Bertie, Camden, Chowan, Eastern Currituck, Gates, Hertford, Northampton, Pasquotank, Perquimans, and Western Currituck Counties. * WHEN...Until 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.