Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 349 AM EDT Mon Apr 11 2016 Valid 12Z Mon Apr 11 2016 - 12Z Wed Apr 13 2016 ...Severe thunderstorms possible through Monday for the Southern Plains... ...Heavy rain and some flash flooding possible across the Deep South... ...Numerous showers expected over the Intermountain West... Warmer temperatures are arriving for the East Coast to start out the work week after the recent cold snap. The surface high pressure area that was over the eastern seaboard is now moving offshore and southerly flow on the backside of this high has commenced, thus advecting warmer weather northward. By Tuesday, a cold front is forecast to reach the East Coast, but the cool-down behind this boundary will not be as significant as the last cold front. Numerous showers and thunderstorms are expected along and ahead of the advancing cold front from the southern Plains to the Midwest. Conditions will be favorable for scattered strong to severe thunderstorms to develop through Monday evening, with the best concentration over Texas and Oklahoma. The area of concern on Tuesday will be closer to the Gulf Coast, but less in the way of severe thunderstorm coverage compared to Monday. Heavy rainfall is also expected with these storms, and the Excessive Rainfall Outlook from WPC has additional information. Scattered showers and a few thunderstorms are likely from California to the Rockies for early in the week, with the greatest rainfall totals expected near the windward sides of the major mountain ranges; with snow likely at the highest elevations. Much of this activity should be diurnally driven with the greatest activity during the afternoon and early evening hours. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php