Moderate

At 324 AM CDT, Doppler radar was tracking a strong thunderstorm over Oregon, or 9 miles northeast of Highland, moving northeast at 15 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... Oregon, Forest City, Iowa Point, and Fanning. This includes Interstate 29 between mile markers 69 and 75. If outdoors, consider seeking shelter inside a building.

* WHAT...Heat index values up to 109 degrees expected. * WHERE...Portions of East Arkansas, North Mississippi, Southeast Missouri, and West Tennessee. * WHEN...From 11 AM this morning to 7 PM CDT Tuesday. * 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...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 8 ft expected. * WHERE...Lake IL and Northern Cook Counties. * WHEN...From this afternoon through Tuesday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

* WHAT...High waves and dangerous currents expected. * WHERE...Beaches along Lake Michigan in Door County. * WHEN...From this evening through Tuesday evening. * IMPACTS...Dangerous swimming conditions are expected. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Several beaches that will be most susceptible to the dangerous swimming conditions include... Rock Island State Beach, Baileys Harbor beaches and Whitefish Dunes Beach in Door County.

* WHAT...High waves and dangerous currents expected. * WHERE...Beaches along Lake Michigan in Kewaunee and Manitowoc Counties. * WHEN...From this afternoon through Tuesday afternoon. * IMPACTS...Dangerous swimming conditions are expected. Strong currents can pull swimmers into deeper water and high waves can sweep people off piers. * ADDITIONAL DETAILS...Several beaches that will be most susceptible to the dangerous swimming conditions include... Cresent Beach and City of Kewaunee Beach in Kewaunee County.

At 249 AM CDT, Doppler radar was tracking a strong thunderstorm over White Cloud, or 9 miles northwest of Highland, moving northeast at 15 mph. HAZARD...Wind gusts up to 50 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Mound City, Oregon, Forest City, White Cloud, Big Lake, Fortescue, Iowa Point, and Iowa Reservation of Kansas and Nebraska.

* WHAT...High risk of rip currents. * WHERE...In Ohio, Lorain, Cuyahoga, Lake and Ashtabula Lakeshore Counties. In Pennsylvania, Northern Erie County. * WHEN...Until 10 AM EDT this morning. * IMPACTS...Wind and wave action will cause currents on the lakeshore. Swimmers should not enter the water. Currents can carry swimmers away from shore through a sand bar and along structures extending out into the lake. Remain out of the water to avoid hazardous swimming conditions.

* WHAT...Heat index values up to 105 expected. * WHERE...Portions of south central Indiana and north central, northwest, and south central Kentucky. * WHEN...From noon EDT /11 AM CDT/ Tuesday to 8 PM EDT /7 PM CDT/ Wednesday. * 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 244 AM CDT, Doppler radar was tracking a cluster of strong thunderstorms 3 miles northwest of Bellwood, or 5 miles southeast of Columbus, moving east at 35 mph. HAZARD...Penny size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. * Locations impacted include... Columbus, David City, Schuyler, Bellwood, Duncan, Monroe, Octavia, Bruno, Linwood, Richland, Abie, Lakeview, Rogers, Fishers Elementary, Lake Oconee, College View Trailer Park, Camp Pawnee,

* WHAT...Dangerous swimming conditions from high waves and rip currents expected. Waves as high as 3 to 5 feet possible. * WHERE...Arenac County. * WHEN...From late tonight through Tuesday evening. * IMPACTS...A high swim risk means that life-threatening waves and currents are expected. Stay out of the water and stay away from dangerous areas like piers and breakwalls. Remain out of the water to avoid hazardous swimming conditions.