ZCZC MIATCPEP1 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM IRWIN ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL EP112011 800 PM PDT THU OCT 06 2011 ...IRWIN CONTINUES TO STRENGTHEN...FORECAST TO BECOME A HURRICANE ON FRIDAY... SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...13.4N 119.0W ABOUT 885 MI...1425 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...WNW OR 295 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.35 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 IRWIN WAS LOCATED NEAR LATITUDE 13.4 NORTH...LONGITUDE 119.0 WEST. IRWIN IS MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH...17 KM/H. A TURN TOWARD THE NORTHWEST AND A DECREASE IN FORWARD SPEED ARE EXPECTED ON FRIDAY...FOLLOWED BY A TURN TOWARD THE NORTH ON SATURDAY. MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR NEAR 65 MPH...100 KM/H...WITH HIGHER GUSTS. ADDITIONAL STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...AND IRWIN IS EXPECTED TO BECOME A HURRICANE ON FRIDAY. TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 70 MILES...110 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 994 MB...29.35 INCHES. HAZARDS AFFECTING LAND ---------------------- NONE NEXT ADVISORY ------------- NEXT COMPLETE ADVISORY...200 AM PDT. $$ FORECASTER BEVEN NNNN
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