EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 1140 AM EDT TUE JUN 17 2014 VALID 12Z FRI JUN 20 2014 - 12Z TUE JUN 24 2014 DESPITE RISING HEIGHTS OVER ALMOST ALL OF THE UNITED STATES, ENOUGH WEAK TROUGHING SHOULD REMAIN AT THE MEDIUM RANGE TO ANCHOR THE POLAR FRONT FROM THE NORTHERN INTERMOUNTAIN REGION TO THE MID ATLANTIC STATES. THE WAVY FRONT WILL KEEP THE CONVECTION FROM BREAKING INTO THE POPCORN PATTERN MORE TYPICAL OF SUMMER. USED A BLEND OF THE 00Z/17 ECMWF AND ECENS MEAN FOR THE FRONTS AND PRESSURES, WITH GENERALLY GOOD AGREEMENT AMONG THE OTHER DETERMINISTIC MODELS AND ENSEMBLE MEANS. THE 27-KM ECMWF HAS THE MAXIMUM QPF ACROSS EASTERN KANSAS AND MISSOURI, WITH A SECONDARY MAXIMUM OVER TEXAS WEST OF THE BIG BEND. THE SOUTHWEST LOOKS HIGH AND DRY. CISCO