124 FXUS64 KFWD 312017 AFDFWD AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FORT WORTH TX 317 PM CDT TUE JUL 31 2012 .DISCUSSION... AFTER SOME IN HOUSE DISCUSSION...WE/VE DECIDED TO EXTEND THE HEAT ADVISORY UNTIL THURSDAY EVENING WITH THE EXPECTATION THAT WE WILL END IT AT THAT TIME. THE STUBBORN UPPER HIGH WILL REMAIN IN PLACE FOR THE NEXT FEW DAYS... BUT DOES SHOW SIGNS OF WEAKENING A LITTLE FRIDAY AND INTO NEXT WEEK AS IT DRIFTS A LITTLE TO THE WEST. THIS SHOULD RESULT IN HIGHS BEING A FEW DEGREES COOLER THAT THE PAST FEW DAYS THIS FRIDAY AND INTO NEXT WEEK. PROGRESSIVE WESTERLY FLOW OVER THE NORTHERN PART OF THE COUNTRY WILL FINALLY AMPLIFY A TROUGH OVER THE EASTERN STATES ON SUNDAY.THIS WILL NUDGE THE UPPER HIGH WESTWARD A LITTLE WITH NORTHWEST TO NORTH UPPER FLOW SPREADING OVER THE EASTERN CWA THE FIRST OF NEXT WEEK. MINOR RIPPLES WITHIN THIS UPPER FLOW AND SOME INCREASE IN LOW LEVEL MOISTURE FROM EAST TEXAS MAY BE ENOUGH FOR ISOLATED AFTERNOON/EARLY EVENING CONVECTION OVER THE FAR EASTERN COUNTIES SUNDAY THROUGH TUESDAY. OTHERWISE... NOTE: THE GFS MODEL CONTINUES TO SUFFER WITH A PROBLEM OF NOT MIXING OUT BOUNDARY LAYER MOISTURE. THIS RESULTS IN SURFACE DEWPOINTS REMAINING TOO HIGH THROUGHOUT THE AFTERNOON AND EVENING HOURS. SINCE THIS ALSO AFFECTS HEAT INDEX CALCULATIONS...WE ARE USING NAM/ECMWF DEWPOINTS WHICH BETTER REFLECTS WHAT ACTUALLY IS OCCURRING. 75 && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 79 105 79 104 79 / 0 0 0 0 5 WACO, TX 76 102 75 102 76 / 0 0 0 0 5 PARIS, TX 75 103 75 103 76 / 0 5 5 0 5 DENTON, TX 78 105 78 105 78 / 0 0 0 0 5 MCKINNEY, TX 77 104 78 104 78 / 0 0 0 0 5 DALLAS, TX 80 105 80 104 80 / 0 0 0 0 5 TERRELL, TX 76 103 76 102 76 / 0 0 0 0 5 CORSICANA, TX 76 102 76 102 76 / 0 0 0 0 5 TEMPLE, TX 74 101 74 101 74 / 0 0 0 0 5 MINERAL WELLS, TX 75 104 75 104 75 / 0 0 0 0 5 && .FWD WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 8 PM CDT THURSDAY FOR TXZ091>095-101>107- 117>123. && $$ /75