Moderate

* WHAT...Heat index values up to 108 expected. * WHERE...Portions of east central and northeast Kansas and central, north central, northeast, and west central Missouri. * WHEN...Until 10 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

* WHAT...Heat index values of 100 to 105 expected. * WHERE...Portions of northwest and west central Illinois, southeast Iowa, and northeast Missouri. * WHEN...From 1 PM this afternoon to 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. Take extra precautions when outside. Wear lightweight and loose

* WHAT...This level of heat affect most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health system and in heat-sensitive industries. * WHERE...Portions of Puerto Rico and Virgin Islands. * WHEN...Until 5 PM AST this afternoon. * 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 down to a quarter mile in dense fog. * WHERE...City and Borough of Yakutat. * WHEN...Until 8 AM AKDT this morning. * IMPACTS...Low visibility could make travel conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of central, south central, and southeast Iowa. * WHEN...From 1 PM this afternoon to 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.

At 927 AM EDT/827 AM CDT/, Doppler radar was tracking strong thunderstorms along a line extending from 11 miles west of English to near Santa Claus. Movement was east at 25 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... English, Carefree Town, Mount Pleasant, Ferdinand, Marengo, Milltown, Leopold, Birdseye, Troy, and Leavenworth. If outdoors, consider seeking shelter inside a building.

* WHAT...For the Dense Fog Advisory, visibility as low as 1/4 mile in dense fog. For the Frost Advisory, temperatures as low as 34 will result in frost formation. * WHERE...Fairbanks North Star Borough * WHEN...Until 9 AM AKDT this morning. * IMPACTS... -Low visibility could make driving conditions hazardous. -Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS... -Fog has developed over the Tanana River and is moving northeast

At 856 AM EDT/756 AM CDT/, Doppler radar was tracking strong thunderstorms along a line extending from 12 miles west of Brandenburg to 15 miles west of Elizabethtown. Movement was northeast at 20 mph. HAZARD...Wind gusts up to 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Elizabethtown, Brandenburg, Radcliff, Webster, Vine Grove, Lebanon Junction, Irvington, Muldraugh, West Point, and Ekron.

At 827 AM EDT, a strong thunderstorm was over Sandy Springs, or 7 miles west of Peachtree Corners, moving east at 5 mph. HAZARD...Heavy rain. SOURCE...Radar indicated. IMPACT...Heavy rain may cause temporary street flooding especially in poor drainage areas. Locations impacted include... Atlanta, Marietta, Peachtree Corners, Sandy Springs, Roswell, Alpharetta, Smyrna, Dunwoody, Chamblee, Norcross, Doraville, North Atlanta, Tucker, Mount Bethel, Mechanicsville, Sandy Plains, Chastain Memorial Park, and Vinings.

* WHAT...Northwest winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Interstate 5 Corridor. * WHEN...From 7 PM this evening to 7 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.