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| #535146 (Received by flhurricane at: 7:44 AM 18.Aug.2012) TCPAT2 BULLETIN TROPICAL STORM HELENE INTERMEDIATE ADVISORY NUMBER 11A NWS NATIONAL HURRICANE CENTER MIAMI FL AL072012 700 AM CDT SAT AUG 18 2012 ...HELENE JUST NORTH OF CABO ROJO... SUMMARY OF 700 AM CDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...21.9N 97.5W ABOUT 35 MI...55 KM SE OF TAMPICO MEXICO MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 310 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...1007 MB...29.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * THE COAST OF MEXICO FROM BARRA DE NAUTLA TO LA CRUZ A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE NEXT 24 HOURS. FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 700 AM CDT...1200 UTC...THE CENTER OF TROPICAL STORM HELENE WAS LOCATED NEAR LATITUDE 21.9 NORTH...LONGITUDE 97.5 WEST. HELENE IS MOVING TOWARD THE NORTHWEST NEAR 8 MPH...13 KM/H...AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR THE NEXT DAY OR SO. ON THE FORECAST TRACK...THE CENTER OF HELENE WILL MOVE INLAND WITHIN THE WARNING AREA SOON. MAXIMUM SUSTAINED WINDS REMAIN NEAR 40 MPH...65 KM/H...WITH HIGHER GUSTS. LITTLE CHANGE IN STRENGTH IS EXPECTED BEFORE LANDFALL. WEAKENING IS ANTICIPATED AFTER THE STORM MOVES INLAND. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 35 MILES...55 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1007 MB...29.74 INCHES. HAZARDS AFFECTING LAND ---------------------- WIND...TROPICAL STORM CONDITIONS...ESPECIALLY IN GUSTS...ARE EXPECTED WITHIN THE WARNING AREA THIS MORNING. RAINFALL...HELENE IS EXPECTED TO PRODUCE TOTAL RAINFALL ACCUMULATIONS OF 4 TO 8 INCHES ACROSS NORTHEASTERN PORTIONS OF MEXICO INCLUDING NORTHERN VERACRUZ...SOUTHERN TAMAULIPAS...AND EASTERN SAN LUIS STATES. THESE RAINS COULD PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES OVER HIGHER ELEVATIONS. STORM SURGE...A STORM SURGE COULD RAISE WATER LEVELS BY AS MUCH AS 1 TO 2 FEET ABOVE NORMAL TIDE LEVELS ALONG THE IMMEDIATE COAST NEAR AND TO THE NORTH OF WHERE THE CENTER MAKES LANDFALL. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...1000 AM CDT. $$ FORECASTER BERG/BRENNAN |
