Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 452 AM EDT Wed Jul 30 2014 Valid 12Z Wed Jul 30 2014 - 12Z Fri Aug 01 2014 ...Heavy rains will raise a risk of flash flooding across much of Oklahoma on Wednesday... ...Unusually cool weather will continue to dominate the eastern half of the Nation... Heavy rains and thunderstorms that impacted the front range of the Colorado Rockies on Tuesday will shift southeastward across Oklahoma on Wednesday. The most organized area of precipitation should develop to the northeast of a surface wave slowly dropping from southeast Colorado to north central Texas...and an abundance of moisture in place could lead to rounds of heavy downpours and flash flooding. The threat for flash flooding should diminish on Thursday as the wave weakens while tracking farther southeastward through Texas...but moderate to heavy rains...with embedded thunderstorms...will still be possible over portions of East Texas and the Lower Mississippi Valley. An anomalous trough carved out over the eastern half of the Nation will keep temperatures below normal from the Great Plains to the Atlantic Coast. Conditions will be especially cool across the Great Lakes and interior New England...where weak disturbances moving through aloft will bring cloud cover and the chance for showers and thunderstorms. Summer heat will persist across northern portions of the Intermountain West and Rockies Wednesday and Thursday...beneath an upper ridge amplified over the Western U.S.. Farther south...monsoonal moisture fueling scattered showers and thunderstorms across the Great Basin and Southern/Central Rockies should suppress daytime maximum temperatures. Gerhardt Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php