Tropical Storm IRWIN
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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
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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
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THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.
DISCUSSION AND 48-HOUR OUTLOOK
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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
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NONE
NEXT ADVISORY
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NEXT COMPLETE ADVISORY...200 AM PDT.
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FORECASTER BEVEN
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