000 WTPZ33 KNHC 270232 TCPEP3 BULLETIN TROPICAL STORM MIRIAM ADVISORY NUMBER 21 NWS NATIONAL HURRICANE CENTER MIAMI FL EP132012 800 PM PDT WED SEP 26 2012 ...MIRIAM WEAKENING FAST OVER COLD WATER... SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...21.5N 115.7W ABOUT 385 MI...615 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NNW OR 345 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES WATCHES AND WARNINGS -------------------- THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 800 PM PDT...0300 UTC...THE CENTER OF TROPICAL STORM MIRIAM WAS LOCATED NEAR LATITUDE 21.5 NORTH...LONGITUDE 115.7 WEST. MIRIAM IS MOVING TOWARD THE NORTH-NORTHWEST NEAR 7 MPH...11 KM/H. A TURN TOWARD THE NORTHWEST AT A SLOWER FORWARD SPEED IS EXPECTED ON THURSDAY. MIRIAM IS THEN FORECAST TO DRIFT WEST-NORTHWESTWARD ON FRIDAY. MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 45 MPH...75 KM/H... WITH HIGHER GUSTS. ADDITIONAL WEAKENING IS FORECAST DURING THE NEXT 48 HOURS...AND MIRIAM COULD BECOME A POST-TROPICAL CYCLONE THURSDAY OR THURSDAY NIGHT. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 115 MILES...185 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 999 MB...29.50 INCHES. HAZARDS AFFECTING LAND ---------------------- SURF...SWELLS GENERATED BY MIRIAM WILL CONTINUE TO AFFECT THE SOUTH AND WEST COASTS OF THE SOUTHERN AND CENTRAL BAJA PENINSULA TONIGHT AND THURSDAY BUT WILL BEGIN TO GRADUALLY SUBSIDE ON FRIDAY. THESE SWELLS COULD CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE. NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...200 AM PDT. $$ FORECASTER BERG