Moderate

* WHAT...Heat index values up to 105. * WHERE...Portions of Indiana and north central, northwest, and south central Kentucky. * WHEN...Until 8 PM EDT /7 PM CDT/ Friday. * 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in

* WHAT...Heat index values up to 105. * WHERE...Portions of south central Indiana and north central and south central Kentucky. * WHEN...Until 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in

Temperatures this afternoon and into the early evening will reach the upper 80s to lower 90s across portions of the lowlands. This, combined with high humidity, will result in heat indices ranging from the middle 90s to near 100 degrees in some locations. Try to limit time outdoors this afternoon when heat illness is most likely to occur. If going outdoors, make sure to drink plenty of fluids and take breaks out of the sun.

A good amount of sunshine and another day under a dome of heat will send temperatures into the low to mid 90s for most of the area again this afternoon. When combined with higher than normal humidities, this results in heat indices from 95 to 100 degrees for much of eastern Kentucky during the afternoon. There is a low chance for showers or storms to provide limited and localized relief today. Try to limit time outdoors today during the afternoon, when heat

* WHAT...Heat index values up to 103-109 degrees can be expected. * WHERE...all of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 7 PM CDT /8 PM EDT/ Sunday. * IMPACTS...Record to near record hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The Heat Advisory has been extended thru Sunday for the entire Quad State Region. Although heat index values will only be near 100, the prolonged period of late season hot

* WHAT...Visibility under a quarter mile at times in dense fog. * WHERE...Much of southwestern and all of south central North Dakota, including the James River Valley. * WHEN...Until 1 PM CDT /noon MDT/ this afternoon. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Conditions should gradually improve over the next couple hours. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Temperatures will reach the lower to mid 90s this afternoon. Combined with high humidity, maximum heat indices will be in the upper 90s to around 100 degrees. Try to limit time outdoors today during the afternoon when heat illness is most likely to occur. If going outdoors, drink plenty of fluids and take breaks out of the sun.

The combination of hot temperatures and elevated humidity levels will produce heat index values between 108 and 111 degrees for several hours Thursday afternoon into Thursday evening. A few locations may briefly experience heat index values above 111 degrees. If you plan to spend time outside, drink plenty of water, wear light weight and light colored clothing and take frequent breaks from the heat. Young children and pets should never be left unattended in vehicles.

* WHAT...Visibility quarter mile or less in dense fog. * WHERE...Eddy, Barnes, Cass, Griggs, Ransom, Richland, Sargent, Steele, and Traill Counties. * WHEN...Until noon CDT today. * 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 103. * WHERE...Portions of central, east central, southeast, and west central Illinois. * WHEN...Until 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.