FXUS63 KABR 161636 CCA AFDABR AREA FORECAST DISCUSSION...UCORRECTED TO ADD ID NATIONAL WEATHER SERVICE ABERDEEN SD 1135 AM CDT SAT AUG 16 2003 .UPDATE...OVERALL THE GOING FORECAST DOES NOT NEED MUCH MAINTENANCE. UPDATING FOR TEMPS MAINLY OVER CENTRAL AND EASTERN CWA. 850HPA TEMPS REMAIN UNCHANGED. LIGHT ESE WINDS ACROSS CWA TODAY...BUT DO NOT FEEL THAT THIS WILL SUBDUE EXTREME HEAT AGAIN TODAY. WITH READINGS IN THE MID TO UPPER 90S EXPERIENCED OVER EASTERN CWA ON FRIDAY...WITH EVEN HIGHER HEAT INDICES...EXPECTING SIMILAR RESULTS TODAY WITH 100 PERCENT SUNSHINE. SURFACE BOUNDARY IS NOW DEPARTING CWA AND HEADED SOUTH OF HERE. UPDATED FORECAST WILL BE OUT SHORTLY. DORN .PREVIOUS DISCUSSION... CURRENT PERIOD STARTS OUT WITH HIGH PRESSURE SURFACE AND ALOFT. A WEAK FRONTAL BOUNDARY WILL SLIDE SOUTH THROUGH THE AREA TODAY BUT NOT END UP BEING MUCH OF A PLAYER. A TROUGH ALONG THE WEST COAST COMES ON SHORE AND DEEPENS TO A CLOSED LOW ALOFT OVER WESTERN MONTANA BY TONIGHT. SURFACE LOW OR TROUGH FORMS IN THE LEE OF THE ROCKIES AND MOVES EAST INTO THE AREA. SURFACE TROUGH BECOMES RATHER PERSISTENT THROUGH MONDAY AS UPPER LOW MOVES INTO WYOMING. WILL CONTINUE SLIGHT CHANCE OF THUNDERSTORMS THROUGH TUESDAY MORNING AS SURFACE TROUGH AND CLOSED LOW ALOFT REMAIN IN THE AREA. THESE GRIDS WILL NEED TO BE REFINED IN LATER RUNS AND MAYBE EXTENDED IN TIME BECAUSE COLD FRONTAL BOUNDARY IS STILL NORTHWEST OF THIS COUNTY WARNING AREA WEDNESDAY MORNING. AFTER THAT IT APPEARS THE H5 RIDGE WILL REFORM AND SURFACE HIGH WILL AGAIN SLIP OVER THE AREA. TEMPERATURES WILL CONTINUE WARM TODAY WITH GOOD SUNSHINE. H85 TEMPERATURES ARE SLIGHTLY LOWER BUT STILL EXPECT TEMPERATURES ABOVE NORMAL. CURRENT GFS IS FAIRLY CONSISTENT WITH THE PREVIOUS COUPLE OF RUNS NOW WITH THE UPPER SYSTEM SLIDING ACROSS THE DAKOTAS ON TUESDAY...AND A COLD FRONT APPROACHING AT THAT TIME...THEN MOVING THROUGH BY WEDNESDAY MORNING. WILL THROW IN A CHANCE OF THUNDER WITH THIS SYSTEM. OTHERWISE...NO CHANGES TO THE REST OF THE EXTENDED. .ABR...NONE KEEFE/PARKIN