* WHAT. Heat index values up to 110 expected. * WHERE. Portions of east central and northeast Kansas and central, north central, northwest, and west central Missouri. * WHEN. Until 8 PM CDT Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 115. * WHERE. Portions of east central and northeast Kansas and central, north central, northwest, and west central Missouri. * WHEN. Until 8 PM CDT Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Flooding caused by excessive rainfall is possible. * WHERE. Portions of Illinois, including the following areas, Bureau, Hancock, Henderson, Henry IL, McDonough, Mercer, Putnam, Rock Island and Warren, Iowa, including the following areas, Cedar, Des Moines, Henry IA, Iowa, Jefferson, Johnson, Keokuk, Lee, Louisa, Muscatine, Scott, Van Buren and Washington, and northeast Missouri, including the following areas, Clark and Scotland. * WHEN. From 4 PM CDT this afternoon through 7 AM CDT Wednesday morning. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS. - Numerous thunderstorms producing very heavy rainfall are expected to develop ahead of a slow moving cold front. Several inches of rain in a short time is possible.

At 448 PM CDT, trained weather spotters reported slow-moving thunderstorms along a line extending from near Delmar to Marengo producing funnel clouds. Movement was southeast at 10 mph. HAZARD. Funnel clouds and possibly weak, brief tornadoes. SOURCE. Trained weather spotters. IMPACT. Isolated damage to roofs, siding and trees is possible. Locations impacted include. Cedar Rapids, Iowa City, Clinton, Maquoketa, Tipton, Marengo, West Branch, Durant, Mechanicsville, Stanwood, Coralville, North Liberty, Eldridge, DeWitt, Mount Vernon, Camanche, West Liberty, Williamsburg, Wilton, and Belle Plaine. This includes the following highways. Interstate 80 in Iowa between mile markers 205 and 285. Interstate 380 between mile markers 1 and 17.

A weak boundary is sitting east west across central Iowa. Showers and isolated thunderstorms are possible this afternoon. Due to the amount of heat and humidity in the air, some funnel clouds or a brief weak tornado is possible this afternoon and early evening. WHAT. Funnel clouds are possible due to current atmospheric conditions. These funnel clouds are typically brief, drop only a few hundred feet from the cloud base, and rarely become a tornado or cause damage. WHERE. Counties across Central Iowa WHEN. 4 to 8 pm IMPACTS. None expected with funnel clouds but if a brief tornado occurs, then some damage will be possible. PREPAREDNESS AND PRECAUTIONARY ACTIONS. If a funnel cloud is spotted, report it to the National Weather Service. If a tornado warning becomes necessary to be issued, take appropriate action and seek shelter immediately.

* WHAT. Flooding caused by excessive rainfall continues to be possible. * WHERE. Portions of Illinois, including the following areas, Bureau, Hancock, Henderson, Henry IL, McDonough, Mercer, Putnam, Rock Island and Warren, Iowa, including the following areas, Cedar, Des Moines, Henry IA, Iowa, Jefferson, Johnson, Keokuk, Lee, Louisa, Muscatine, Scott, Van Buren and Washington, and northeast Missouri, including the following areas, Clark and Scotland. * WHEN. Through 7 AM CDT Wednesday morning. * IMPACTS. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS. - Numerous thunderstorms producing very heavy rainfall are expected to develop ahead of a slow moving cold front. Several inches of rain in a short time is possible.

* WHAT. Heat index values of 105 to 108. * WHERE. Portions of east central and northeast Kansas and central, north central, northwest, and west central Missouri. * WHEN. Until 8 PM CDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

The Flood Watch continues for the following rivers in Illinois. Missouri. Mississippi River at Gregory Landing affecting Hancock and Clark Counties. . The Flood Watch is replaced by a River Flood Warning for the following rivers in Illinois. Iowa. Mississippi River at Ill. City LD16 affecting Rock Island and Muscatine zones. Mississippi River at Bellevue LD12 affecting Jackson, Clinton, Jo Daviess and Carroll Counties. Mississippi River at Le Claire LD14 affecting Rock Island and Scott zones. Mississippi River at Fulton LD13 affecting Clinton, Carroll and Whiteside Counties. * WHAT. Flooding is possible. * WHERE. Mississippi River at Gregory Landing. * WHEN. From Saturday afternoon until further notice. * IMPACTS. At 17.0 feet, Water affects the road north of the grain elevator in Gregory Landing. * ADDITIONAL DETAILS. - At 12:00 PM CDT Tuesday the stage was 12.7 feet. - Forecast. Flood stage may be reached early Saturday afternoon. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood

Heat and humidity will build today across much of eastern Iowa, northwest and western Illinois, and northeast Missouri. Heat index readings will rise to the upper 90s to around 100 degrees through early this evening. If you plan to spend time outdoors through early this evening, be sure to stay hydrated by drinking plenty of water, and take frequent breaks in shaded areas or in an air conditioned building. Also, be sure to look before you lock! Don't leave your pets or kids in parked vehicles.