HAWAII EXTENDED FORECAST DISCUSSION NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD 801 AM EDT FRI AUG 10 2012 VALID 00Z SAT AUG 11 2012 - 00Z SAT AUG 18 2012 A SURFACE HIGH OF ABOUT 1024-1028 MB WILL REMAIN IN PLACE IN THE EASTERN PACIFIC THROUGH DAY 5. THIS WILL FAVOR A CONTINUATION OF MODERATE LOW LEVEL TRADE WINDS. CHANGES WILL OCCUR ALOFT IN THE SHORT TERM...HOWEVER...AS A SHORT WAVE TROUGH PINCHES OFF FROM THE WESTERLIES AND DRIFTS BACK WESTWARD ACROSS THE HAWAIIAN ISLANDS. MODELS HAVE BEEN CONSISTENT IN SHOWING A TEMPERATURE DECREASE OF 4 C AT THE INVERSION HEIGHT AROUND 800 TO 700 MB FROM LATE TODAY THROUGH SATURDAY. ONCE COOLED...THE INVERSION REMAINS COOLED THROUGH TIME AS THE TROUGH AXIS SHEARS AND BEGINS TO LIFT BACK NORTHWARD. THE DECREASE OF STABILITY...AND TO SOME EXTENT LIFT FROM THE TROUGH...WILL PROMOTE INCREASED DIURNAL SHOWERS IN THE WINDWARD AND MAUKA AREAS. PW REMAINING NEARLY STATIC THOUGH...SHOULD PREVENT ANY SIGNIFICANT UPSWING OF ORGANIZED HEAVY RAIN. BY DAY 6/7...THE SURFACE RIDGE IN THE EASTERN PACIFIC WILL BEGIN TO SHIFT WESTWARD...TO THE NORTH OF HAWAII. WINDS WILL BACK TO A MORE NORTHERLY COMPONENT...WITH SOME SLACKENING OF SPEED. BURKE