Moderate

* WHAT...Visibility as low as a quarter mile in dense fog. * WHERE...South Laramie Range and Foothills including the Interstate 80 Summit between Cheyenne and Laramie. * WHEN...Until 7 AM MDT 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.

Areas of fog, some locally dense with visibilities under one half mile can be expected early this morning. Motorists should exercise caution, as visibilities could change suddenly over short distances. If you encounter dense fog, slow down, give yourself plenty of braking distance with other vehicles, and keep headlights on low beam.

The combination of temperatures rising to near 90 degrees and high humidity levels will result in maximum heat indices of 95 to 105 degrees in most locations this afternoon. Those who are sensitive to the heat are encouraged to take precautions to prevent heat-related illness.

At 144 AM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Prairie View to Portis. Movement was north at 20 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Strong thunderstorms will be near... Kensington, Agra, Long Island, Gaylord, Harlan, and Cedar around 150 AM CDT. Athol around 155 AM CDT. Other locations in the path of these storms include Smith Center and

* WHAT...Visibility of 1/4 mile or less in dense fog. * WHERE...City and Borough of Yakutat. * WHEN...Until 7 AM AKDT Sunday. * IMPACTS...Low visibility could make travel conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

At 147 AM CDT, Doppler radar was tracking a cluster of strong thunderstorms near Tipton, or 17 miles west of Beloit, moving northeast at 35 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. This strong thunderstorm will be near... Glen Elder around 155 AM CDT. If outdoors, consider seeking shelter inside a building.

* WHAT...Heat index values up to 109 expected. * WHERE...Portions of southeast North Carolina and northeast South Carolina. * WHEN...From 11 AM this morning 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.

At 154 AM CDT, Doppler radar was tracking a strong thunderstorm 8 miles southeast of Jamestown, moving northeast at 40 mph. HAZARD...Strong 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... Concordia, Glasco, Scandia, Jamestown, and Norway. If outdoors, consider seeking shelter inside a building.

At 135 AM CDT, Doppler radar was tracking a strong thunderstorm near Asherville, or near Beloit, moving northeast at 45 mph. HAZARD...Wind gusts of 50 to 55 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. This strong thunderstorm will be near... Asherville around 140 AM CDT. Scottsville around 150 AM CDT. If outdoors, consider seeking shelter inside a building.

* WHAT...Heat index values of 100 to 105 degrees are expected. * WHERE...In Illinois, Bond IL, Fayette IL, Montgomery IL, Calhoun IL, Greene IL, Jersey IL, and Macoupin IL Counties. In Missouri, Lincoln MO County. * WHEN...Until 9 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.