Weather Underground Forecast for Tuesday, July 09, 2013.
Hot, humid, and wet conditions will continue for the Eastern Seaboard on Tuesday, while active weather ramps up in the Central and Midwestern U.S.
In the East, an area of high pressure spanning across the Southeast into the western Atlantic Ocean will maintain southerly flow from the Gulf of Mexico into the region. As moisture streams in from the south, warm and moist conditions combined with daytime heating will lead to areas of scattered showers and thunderstorms from parts of the Gulf Coast northward into the Northeast. A frontal disturbance lingering over the northern tier of the Northeast will also support rain and storms through the afternoon and evening. Meanwhile, daytime temperatures will remain a few degrees above average in the Mid-Atlantic as highs climb into the upper 80s and 90s.
Behind this activity, a cold front with a wave of low pressure will organized over the North -Central U.S. and trek eastward toward the Midwest through the day. Sufficient moisture and energy ahead of this disturbance will support showers and thunderstorms with possible severe thunderstorm development. The Storm Prediction Center has issued a slight risk of severe thunderstorms from parts of the Central Plains into the Upper Mississippi Valley and Upper Great Lakes through the evening hours. Stronger storms may become capable of producing damaging wind gusts, large hail, and possibly several tornadoes.
Out West, hot conditions will linger over parts of the western interior due to prevailing high pressure. Chances of scattered showers and thunderstorms will also continue in the Four Corners due to monsoonal moisture.
Temperatures in the Lower 48 states Monday have ranged from a morning low of 37 degrees at Stanley, Idaho to a high of 113 degrees at Needles, Calif.