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Atlantic Hurricane ALEX Advisory Number 18Tue, 29 Jun 2010 21:32:06 -0500000WTNT31 KNHC 300231TCPAT1BULLETINHURRICANE ALEX ADVISORY NUMBER 18NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL0120101000 PM CDT TUE JUN 29 2010...ALEX BECOMES THE FIRST HURRICANE OF THE 2010 SEASON AND THE FIRSTJUNE ATLANTIC HURRICANE SINCE 1995...SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION-----------------------------------------------LOCATION...23.1N 94.8WABOUT 195 MI...315 KM ESE OF LA PESCA MEXICOABOUT 255 MI...415 KM SE OF BROWNSVILLE TEXASMAXIMUM SUSTAINED WINDS...75 MPH...120 KM/HRPRESENT MOVEMENT...W OR 280 DEGREES AT 9 MPH...15 KM/HRMINIMUM CENTRAL PRESSURE...973 MB...28.73 INCHESWATCHES AND WARNINGS--------------------CHANGES WITH THIS ADVISORY...NONE.SUMMARY OF WATCHES AND WARNINGS IN EFFECT...A HURRICANE WARNING IS IN EFFECT FOR...* THE COAST OF TEXAS SOUTH OF BAFFIN BAY TO THE MOUTH OF THE RIOGRANDE* THE COAST OF MEXICO FROM THE MOUTH OF THE RIO GRANDE TO LA CRUZA TROPICAL STORM WARNING IN IN EFFECT FOR...* THE COAST OF TEXAS FROM BAFFIN BAY TO PORT OCONNOR* THE COAST OF MEXICO SOUTH OF LA CRUZ TO CABO ROJOFOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITEDSTATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASEMONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICEFORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDEUNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONALMETEOROLOGICAL SERVICE.DISCUSSION AND 48-HOUR OUTLOOK------------------------------AT 1000 PM CDT...0300 UTC...THE CENTER OF HURRICANE ALEX WAS LOCATEDNEAR LATITUDE 23.1 NORTH...LONGITUDE 94.8 WEST. ALEX HAS MOVEDMOSTLY WESTWARD NEAR 9 MPH...15 KM/HR...OVER THE PAST FEW HOURS BUTA GENERAL WEST-NORTHWESTWARD MOTION IS EXPECTED OVER THE NEXT 24 TO48 HOURS. ON THE FORECAST TRACK...THE CENTER OF ALEX WILL APPROACHTHE COAST OF NORTHEASTERN MEXICO OR SOUTHERN TEXAS ON WEDNESDAY ANDMAKE LANDFALL IN THE HURRICANE WARNING AREA LATE WEDNESDAY ORWEDNESDAY NIGHT.MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 75 MPH...120KM/HR...WITH HIGHER GUSTS. ALEX IS A CATEGORY ONE HURRICANE ON THESAFFIR-SIMPSON HURRICANE WIND SCALE. ADDITIONAL STRENGTHENING ISFORECAST PRIOR TO LANDFALL. ALEX WILL BEGIN TO WEAKEN AFTER ITSCENTER CROSSES THE COASTLINE.HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 15 MILES...30 KM...FROMTHE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 175MILES...280 KM.THE MINIMUM CENTRAL PRESSURE REPORTED BY AN AIR FORCE HURRICANEHUNTER PLANE WAS 973 MB...28.73 INCHES.HAZARDS AFFECTING LAND----------------------RAINFALL...ALEX IS EXPECTED TO PRODUCE TOTAL RAINFALL ACCUMULATIONSOF 6 TO 12 INCHES OVER PORTIONS OF NORTHEASTERN MEXICO AND SOUTHERNTEXAS...WITH ISOLATED MAXIMUM AMOUNTS OF 20 INCHES. THESE RAINSCOULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES...ESPECIALLY IN MOUNTAINOUS TERRAIN. RAINBANDS ASSOCIATED WITH ALEXARE SPREADING ONSHORE IN NORTHEASTERN MEXICO AND SOUTHERN TEXAS.WIND...TROPICAL STORM CONDITIONS ARE EXPECTED TO REACH THE COASTWITHIN THE HURRICANE AND TROPICAL STORM WARNING AREAS BEGINNING LATETONIGHT OR EARLY WEDNESDAY...MAKING OUTSIDE PREPARATIONS DIFFICULTOR DANGEROUS.STORM SURGE...A DANGEROUS STORM SURGE WILL RAISE WATER LEVELS BYAS MUCH AS 3 TO 5 FEET ABOVE GROUND LEVEL ALONG THE IMMEDIATE COASTTO THE NORTH OF WHERE THE CENTER MAKES LANDFALL. THE SURGE COULDPENETRATE INLAND AS FAR AS SEVERAL MILES FROM THE SHORE WITH DEPTHGENERALLY DECREASING AS THE WATER MOVES INLAND. NEAR THE COAST...THE SURGE WILL BE ACCOMPANIED BY LARGE AND DESTRUCTIVE WAVES.TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER PORTIONS OF EXTREMESOUTHERN TEXAS ON WEDNESDAY.NEXT ADVISORY-------------NEXT INTERMEDIATE ADVISORY...100 AM CDT.NEXT COMPLETE ADVISORY...400 AM CDT.$$FORECASTER PASCH/BERG