Moderate

* WHAT...Heat index values of 105 to 109 degrees. * WHERE...Portions of central, east central, eastern, south central, and southeast 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.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Big Stone and Traverse Counties. In South Dakota, Hand, Edmunds, Faulk, Potter, Walworth, Brown, Grant, and Roberts Counties. * WHEN...Until 11 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...Temperatures up to 80 expected. * WHERE...Prince of Wales Island. * WHEN...From noon today to 7 PM AKDT this evening. * IMPACTS...Individuals not accustomed to these unusually hot temperatures for this region may experience heat related illnesses. Drink plenty of fluids, and check up on elderly and vulnerable relatives and neighbors. Close curtains during the daytime to reduce sun insulation into the home and open windows at night to allow the home to cool off. Utilize fans or community buildings with air conditioning.

At 848 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Eaton Rapids to 6 miles west of Leslie to 7 miles northeast of Albion. Movement was east at 45 mph. HAZARD...Wind gusts up to 50 mph and penny 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... Jackson... Mason... Leslie...

* WHAT...Afternoon heat index values up to 108 expected. Overnight low temperatures between 72 and 78. * WHERE...Portions of southwest Iowa and east central and southeast Nebraska. * WHEN...Until 7 PM CDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Several days of excessive heat will add to cumulative heat stress. * ADDITIONAL DETAILS...The heat advisory may be extended or expanded as the prolonged heatwave continues.

* WHAT...Heat index values up to 108 expected. * WHERE...Portions of west central Iowa and east central and northeast Nebraska. * WHEN...From 1 PM this afternoon to 6 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Several days of excessive heat will add to cumulative heat stress. 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

At 858 AM EDT, Doppler radar was tracking strong thunderstorms along a line extending from near Sandusky to near Bellevue. Movement was southeast at 35 mph. HAZARD...Wind gusts up to 50 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... Norwalk, Bellevue, New London, Milan, Wakeman, Greenwich, Monroeville, and North Fairfield.

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of northwest and west central Iowa, northeast Nebraska, and south central and southeast South Dakota. * WHEN...From 1 PM this afternoon to 6 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Drink plenty of fluids, stay in an air-conditioned room, stay out of

At 719 AM CDT, Doppler radar was tracking a line of strong thunderstorms extending from 9 miles northeast of Lake Poygan to 8 miles east of Rush Lake, or extending from 15 miles northwest of Oshkosh to 10 miles southwest of Oshkosh, moving east at 40 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. The strong thunderstorm will be near... Central Lake Winnebago around 725 AM CDT.

Patchy fog will continue to affect portions of central and northeast SD and west central MN, reducing visibilities to 1 mile, localized areas of one quarter mile for the next couple of hours. If traveling this morning, reduce your speed and use low-beam headlights when encountering foggy areas.