000 WTPZ34 KNHC 230540 TCPEP4 BULLETIN HURRICANE HILARY INTERMEDIATE ADVISORY NUMBER 8A NWS NATIONAL HURRICANE CENTER MIAMI FL EP092011 1100 PM PDT THU SEP 22 2011 ...HILARY EVEN STRONGER BUT GRADUALLY MOVING FARTHER AWAY FROM THE SOUTHWESTERN COAST OF MEXICO... SUMMARY OF 1100 PM PDT...0600 UTC...INFORMATION ----------------------------------------------- LOCATION...16.0N 101.4W ABOUT 115 MI...185 KM WSW OF ACAPULCO MEXICO MAXIMUM SUSTAINED WINDS...145 MPH...235 KM/H PRESENT MOVEMENT...WNW OR 290 DEGREES AT 10 MPH...16 KM/H MINIMUM CENTRAL PRESSURE...944 MB...27.88 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... THE GOVERNMENT OF MEXICO HAS DISCONTINUED THE TROPICAL STORM WARNING FROM ACAPULCO EASTWARD TO LAGUNAS DE CHACAHUA. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * WEST OF ACAPULCO MEXICO WESTWARD TO PUNTA SAN TELMO A TROPICAL STORM WATCH IS IN EFFECT FOR... * WEST OF PUNTA SAN TELMO TO MANZANILLO FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1100 PM PDT...0600 UTC...THE EYE OF HURRICANE HILARY WAS LOCATED NEAR LATITUDE 16.0 NORTH...LONGITUDE 101.4 WEST. HILARY HAS JOGGED TO THE WEST DURING THE PAST SEVERAL HOURS. HOWEVER...IT IS EXPECTED TO MOVE GENERALLY WEST-NORTHWESTWARD NEAR 10 MPH...16 KM/H...DURING THE NEXT COUPLE OF DAYS. ON THE FORECAST TRACK...THE CORE OF HILARY SHOULD CONTINUE TO MOVE PARALLEL TO THE COAST OF SOUTHWESTERN MEXICO...BUT ANY DEVIATION TO THE NORTH OF THE TRACK COULD BRING STRONGER WINDS TO THE COAST. SATELLITE IMAGES INDICATE THAT HILARY CONTINUES TO STRENGTHEN...AND THE MAXIMUM SUSTAINED WINDS ARE NOW ESTIMATED TO BE NEAR 145 MPH...235 KM/H...WITH HIGHER GUSTS. HILARY IS A CATEGORY FOUR HURRICANE ON THE SAFFIR-SIMPSON HURRICANE WIND SCALE. SOME ADDITIONAL STRENGTHENING IS POSSIBLE ON FRIDAY...WITH FLUCTUATIONS IN INTENSITY EXPECTED OVER THE WEEKEND. HILARY IS A SMALL TROPICAL CYCLONE. HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 25 MILES...35 KM...FROM THE CENTER...AND TROPICAL- STORM-FORCE WINDS EXTEND OUTWARD UP TO 80 MILES...130 KM. ESTIMATED MINIMUM CENTRAL PRESSURE IS 944 MB...27.88 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL-STORM-FORCE WINDS ARE AFFECTING PORTIONS OF THE COAST WITHIN THE WARNING AREA. THESE WINDS ARE EXPECTED TO SPREAD WESTWARD ALONG THE COAST DURING THE NEXT 24 TO 36 HOURS. RAINFALL...HILARY IS EXPECTED TO PRODUCE RAINFALL AMOUNTS OF 3 TO 5 INCHES ACROSS SOUTHERN GUERRERO AND SOUTHERN MICHOACAN IN SOUTHERN MEXICO WITH ISOLATED AMOUNTS OF 10 INCHES POSSIBLE. SURF...SWELLS GENERATED BY HILARY ARE AFFECTING PORTIONS OF THE COAST OF SOUTHWESTERN MEXICO. THESE SWELLS ARE LIKELY CAUSING LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...200 AM PDT. $$ FORECASTER KIMBERLAIN/BLAKE