WTPA31 PHFO 260252 TCPCP1 BULLETIN TROPICAL STORM NIALA ADVISORY NUMBER 5 NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP062015 500 PM HST FRI SEP 25 2015 ...TROPICAL STORM NIALA SOUTHEAST OF HAWAII AND MOVING NORTHWESTWARD... SUMMARY OF 500 PM HST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...16.2N 150.7W ABOUT 375 MI...605 KM SE OF HILO HAWAII ABOUT 590 MI...945 KM SE OF HONOLULU HAWAII MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES WATCHES AND WARNINGS -------------------- CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * HAWAII COUNTY A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE IN THE MAIN HAWAIIAN ISLANDS SHOULD MONITOR THE PROGRESS OF TROPICAL STORM NIALA. FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY THE NATIONAL WEATHER SERVICE OFFICE IN HONOLULU HAWAII. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 500 PM HST...0300 UTC...THE CENTER OF TROPICAL STORM NIALA WAS LOCATED NEAR LATITUDE 16.2 NORTH...LONGITUDE 150.7 WEST. NIALA IS MOVING TOWARD THE NORTHWEST NEAR 7 MPH...11 KM/H. THIS MOTION IS EXPECTED TO CONTINUE THROUGH TONIGHT...FOLLOWED BY A TURN TOWARD THE WEST AND A SLOWING OF THE FORWARD MOTION SATURDAY AND SUNDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH...85 KM/H...WITH HIGHER GUSTS. SOME INTENSIFICATION IS POSSIBLE THROUGH EARLY SATURDAY...FOLLOWED BY WEAKENING SATURDAY NIGHT AND SUNDAY. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 80 MILES...130 KM FROM THE CENTER. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 999 MB...29.50 INCHES. HAZARDS AFFECTING LAND ---------------------- RAINFALL...DEEP TROPICAL MOISTURE ASSOCIATED WITH TROPICAL STORM NIALA WILL SPREAD OVER SOUTHEAST END OF THE MAIN HAWAIIAN ISLAND CHAIN THROUGH THE WEEKEND. RAINFALL TOTALS OF 6 TO 12 INCHES...WITH LOCALLY HIGHER AMOUNTS...ARE EXPECTED WITHIN THE WATCH AREA. SURF...SWELLS ASSOCIATED WITH TROPICAL STORM NIALA WILL PRODUCE LARGE SURF ALONG SOUTHEAST FACING SHORES OF MAINLY THE BIG ISLAND THIS WEEKEND AND CONTINUING INTO EARLY NEXT WEEK. WIND...TROPICAL STORM CONDITIONS ARE POSSIBLE ON THE BIG ISLAND ON SUNDAY. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...800 PM HST. NEXT COMPLETE ADVISORY...1100 PM HST. $$ FORECASTER WROE