Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 431 PM EDT Mon Jun 02 2014 Valid 00Z Tue Jun 03 2014 - 00Z Thu Jun 05 2014 ...Showers and thunderstorms likely ahead of a cold front sweeping across the Great Lakes, Ohio Valley, and the Northeast... ...Heavy rainfall and severe weather is expected to begin developing across the Central Plains by Tuesday afternoon... Widespread showers and thunderstorms will continue to break out across the Great Lakes and Ohio Valley overnight tonight and into the morning hours of Tuesday ahead of a cold front pushing its way eastward through these regions. The very warm and moisture rich airmass in place will allow for organized areas of convection containing heavy rainfall, but the progressive nature of the system should limit any widespread flash flooding issues. Ahead of the this, temps and dewpoints will continue to increase across the Northeast and Mid-Atlantic regions, and the rain and storms will begin to move into these areas by late morning or early afternoon on Tuesday. Upstream, vigorous energy moving up and over the upper ridge in place across the Southern tier of the country should provide the ideal setup for a heavy rain and severe weather event in the Central U.S. Tuesday into Wednesday. Very heavy rainfall, with embedded strong to severe thunderstorms, is expected to develop north of a strengthening frontal boundary in the Central Plains Tuesday afternoon, and move into the Middle Mississippi Valley and western portions of the Ohio Valley Tuesday night and into Wednesday. WPC is highlighting a slight risk for flash flooding from eastern Nebraska to central Indiana, with a moderate risk located in southern Iowa. Meanwhile, the Storm Prediction Center will be monitoring a slight to moderate risk for severe weather from the northern High Plains to the Middle Mississippi Valley. Elsewhere, some isolated to scattered shower and thunderstorm activity across the Southeast and Central Gulf Coast regions remains in the forecast for Tuesday, but should finally come to an end by Wednesday morning as surface high pressure dominates. In the northern parts of the Intermountain West, some very light precipitation could be possible as weak energy moves through in the flow aloft. Monarski Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php