Moderate

At 1058 AM MDT, Doppler radar was tracking a strong thunderstorm 15 miles north of New Harmony, or 16 miles west of Cedar City, moving northeast at 25 mph. HAZARD...Wind gusts of 50 to 55 mph and nickel 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... Cedar City, Enoch, Parowan, Paragonah, and Summit. This includes the following highways...

* WHAT...Heat index values 100 to 104 expected. Overnight heat indices in the middle 70s. * WHERE...Portions of northern Indiana and northwest Ohio. * WHEN...From 2 PM EDT /1 PM CDT/ Tuesday to 8 PM EDT /7 PM CDT/ Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...A period of dangerous heat and humidity is in store through at least Wednesday evening, with minimal relief Tuesday night. Chances for showers and thunderstorms should remain

* WHAT...Heat index values up to 100-103 degrees. * WHERE...Portions of central and south central Iowa, including the Des Moines metro. * WHEN...Until 7 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...While heat index values may not reach 105 degrees each day, the combination of the longevity of the heat and little or limited relief during the overnight periods with warm lows have prompted the multi-day Heat Advisory.

* WHAT...Daily peak heat index values from 100 up to near 110 degrees. * WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 8 PM CDT /9 PM EDT/ Friday. * IMPACTS...Prolonged duration 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 in excess of 105 expected. * WHERE...Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, southwest, and west central Mississippi. * WHEN...Until 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. Do not leave young children and pets in unattended vehicles. Car

* WHAT...For the first Heat Advisory, heat index values up to 106 expected. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...In Arkansas, Southern Crawford, Central and Southern Franklin, and North and Central Sebastian Counties. In Oklahoma, Mayes, Nowata, Rogers, Southeast Osage, Tulsa, Wagoner, and Washington OK Counties. * WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from noon to 8 PM CDT Tuesday.

* WHAT...For the first Heat Advisory, heat index values up to 106 expected. For the second Heat Advisory, heat index values up to 107 expected. * WHERE...In Arkansas, Southern Crawford, Central and Southern Franklin, and North and Central Sebastian Counties. In Oklahoma, Mayes, Nowata, Rogers, Southeast Osage, Tulsa, Wagoner, and Washington OK Counties. * WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from noon to 8 PM CDT Tuesday.

* WHAT...High wave action, strong currents, and dangerous swimming conditions expected. Piers may be swamped by waves. * WHERE...Mason, Oceana, Muskegon and Ottawa counties. * WHEN...Until 11 PM EDT this evening. * IMPACTS...Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. Remain out of the water to avoid hazardous swimming conditions and do not venture out on piers. Please check with your local authorities on potential beach closures.

* WHAT...Dangerous rip currents expected. * WHERE...Walton County Beaches. * WHEN...Through late tonight. * 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...Strong rip currents are expected. Minor coastal flooding and wave run-ups are possible north of Port Bolivar, particularly during times of high tide. * WHERE...Gulf-facing beaches,including Galveston Island and the Bolivar Peninsula. * WHEN...From late tonight through Wednesday morning. * IMPACTS...Flooding of lots, parks, and roads with only isolated road closures possible, particularly for areas north of Port Bolivar. Rip currents can sweep even the best swimmers away from shore into deeper water.