WTPZ32 KNHC 150854 RRA

TCPEP2



BULLETIN

TROPICAL STORM NORMA ADVISORY NUMBER   4

NWS NATIONAL HURRICANE CENTER MIAMI FL       EP172017

300 AM MDT FRI SEP 15 2017



...NORMA FORECAST TO BECOME A HURRICANE WHILE MOVING SLOWLY TOWARD

BAJA CALIFORNIA SUR...





SUMMARY OF 300 AM MDT...0900 UTC...INFORMATION

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LOCATION...18.6N 109.7W

ABOUT 85 MI...140 KM E OF SOCORRO ISLAND

ABOUT 295 MI...480 KM S OF CABO SAN LUCAS MEXICO

MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H

PRESENT MOVEMENT...N OR 350 DEGREES AT 2 MPH...4 KM/H

MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES





WATCHES AND WARNINGS

--------------------



THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.



INTERESTS IN BAJA CALIFORNIA SUR SHOULD MONITOR THE PROGRESS OF

NORMA. A HURRICANE WATCH COULD BE REQUIRED LATER TODAY FOR PORTIONS

OF THE PENINSULA.





DISCUSSION AND 48-HOUR OUTLOOK

------------------------------

AT 300 AM MDT (0900 UTC), THE CENTER OF TROPICAL STORM NORMA WAS

LOCATED NEAR LATITUDE 18.6 NORTH, LONGITUDE 109.7 WEST. NORMA IS

MOVING TOWARD THE NORTH NEAR 2 MPH (4 KM/H), AND THIS SLOW MOTION IS

EXPECTED TO CONTINUE FOR THE NEXT COUPLE OF DAYS.



MAXIMUM SUSTAINED WINDS ARE NEAR 50 MPH (85 KM/H) WITH HIGHER GUSTS.

SOME STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS AND NORMA

IS EXPECTED TO BECOME A HURRICANE ON SATURDAY.



TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 70 MILES (110 KM)

FROM THE CENTER.



THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1000 MB (29.53 INCHES).





HAZARDS AFFECTING LAND

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SURF:  SWELLS GENERATED BY NORMA WILL BEGIN AFFECTING PORTIONS

OF THE COAST OF SOUTHWESTERN MEXICO AND BAJA CALIFORNIA SUR THIS