Moderate

At 1143 PM MDT, Doppler radar was tracking a strong thunderstorm over Magic Valley Regional Airport, or 7 miles south of Twin Falls, moving north at 30 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. Areas of blowing dust reducing visibility. Minor damage to outdoor objects is possible. This strong thunderstorm will be near... Twin Falls and Magic Valley Regional Airport around 1150 PM MDT.

* WHAT...Heat index values up to 109 expected. * WHERE...Portions of central, eastern, north central, southeast, and western Arkansas. * WHEN...From 10 AM this morning to 8 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 fitting clothing. Try to limit strenuous activities to early morning

* WHAT...Heat index values up to 105. * WHERE...Christian, Sangamon, Shelby, Cumberland, Morgan, and Scott Counties. * 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.

* WHAT...Heat index values up to 105. * WHERE...Clay, Crawford, Effingham, Jasper, Lawrence, and Richland Counties. * 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.

* WHAT...Dangerous rip currents expected. * WHERE...Coastal Palm Beach County. * WHEN...Through Friday morning. * IMPACTS...Rip currents can sweep even the best swimmers away from shore into deeper water. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Kansas, Decatur, Norton, and Rawlins Counties. In Nebraska, Hitchcock and Red Willow Counties. * WHEN...Until 10 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...Visibility one quarter mile or less in dense fog. * WHERE...Custer, Blaine, Garfield, Loup, Thomas, Wheeler, Frontier, Hayes, Lincoln, and Logan Counties. * WHEN...Until 10 AM CDT Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

At 1041 PM MDT, Doppler radar was tracking a line of strong thunderstorms extending from 28 miles south of National Radio Astronomy Observatory to 18 miles south of Bosque Del Apache Refuge, moving north at 25 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 damage to outdoor objects is possible. Locations impacted include... Socorro, Magdalena, San Antonio, Bosque Del Apache Refuge,

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Portions of north central Kansas and central, east central, and south central Nebraska. * WHEN...Until 10 AM CDT Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Republic, Washington, Brown, Marshall, and Nemaha Counties. * WHEN...Until 10 AM CDT Thursday. * IMPACTS...Low visibility could make driving conditions hazardous. If driving, slow down, use your low beam headlights, and leave plenty of distance ahead of you.