054  
WTPZ31 KNHC 311436  
TCPEP1  
 
BULLETIN  
POST-TROPICAL CYCLONE ALVIN ADVISORY NUMBER 12  
NWS NATIONAL HURRICANE CENTER MIAMI FL EP012025  
800 AM MST SAT MAY 31 2025  
   
..ALVIN DEGENERATES TO A REMNANT LOW  
 
...SWELLS AND RIP CURRENTS POSSIBLE ALONG PORTIONS OF THE COASTS OF  
WEST-CENTRAL MAINLAND MEXICO AND SOUTHERN BAJA CALIFORNIA THIS  
WEEKEND...  
 
 
SUMMARY OF 800 AM MST...1500 UTC...INFORMATION  
----------------------------------------------  
LOCATION...20.7N 109.5W  
ABOUT 155 MI...250 KM S OF THE SOUTHERN TIP OF BAJA CALIFORNIA  
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H  
PRESENT MOVEMENT...N OR 360 DEGREES AT 9 MPH...15 KM/H  
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES  
 
 
WATCHES AND WARNINGS  
--------------------  
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.  
 
 
DISCUSSION AND OUTLOOK  
----------------------  
AT 800 AM MST (1500 UTC), THE CENTER OF POST-TROPICAL CYCLONE ALVIN  
WAS LOCATED NEAR LATITUDE 20.7 NORTH, LONGITUDE 109.5 WEST. THE  
POST-TROPICAL CYCLONE IS MOVING TOWARD THE NORTH NEAR 9 MPH (15  
KM/H). A SLIGHTLY SLOWER NORTHWARD MOTION IS EXPECTED THROUGH  
TONIGHT.  
 
MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 35 MPH (55 KM/H)  
WITH HIGHER GUSTS. ADDITIONAL WEAKENING IS EXPECTED TODAY AND THE  
LOW IS FORECAST TO DISSIPATE BY SUNDAY.  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1006 MB (29.71 INCHES).  
 
 
HAZARDS AFFECTING LAND  
----------------------  
SURF: SWELLS GENERATED BY THIS SYSTEM WILL AFFECT PORTIONS OF THE  
COASTS OF WEST-CENTRAL MEXICO AND THE SOUTHERN BAJA CALIFORNIA  
PENINSULA THROUGH THE WEEKEND. THESE SWELLS ARE LIKELY TO CAUSE  
LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT  
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.  
 
 
NEXT ADVISORY  
-------------  
THIS IS THE LAST PUBLIC ADVISORY ISSUED BY THE NATIONAL HURRICANE  
CENTER ON ALVIN. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE  
FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER  
SERVICE, UNDER AWIPS HEADER NFDHSFAT1, WMO HEADER FZNT01 KWBC, AND  
ONLINE AT OCEAN.WEATHER.GOV/SHTML/NFDHSFAT1.PHP  
 
 
FORECASTER BROWN  
 
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