738  
WTNT33 KNHC 291440  
TCPAT3  
 
BULLETIN  
HURRICANE HUMBERTO ADVISORY NUMBER 20  
NWS NATIONAL HURRICANE CENTER MIAMI FL AL082025  
1100 AM AST MON SEP 29 2025  
 
...HUMBERTO EXPECTED TO PRODUCE DANGEROUS SURF AND RIP CURRENTS FOR  
BERMUDA AND MOST OF THE U.S. EAST COAST THIS WEEK...   
..TROPICAL STORM CONDITIONS POSSIBLE IN BERMUDA ON TUESDAY  
 
 
 
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION  
-----------------------------------------------  
LOCATION...28.0N 67.6W  
ABOUT 340 MI...550 KM SSW OF BERMUDA  
MAXIMUM SUSTAINED WINDS...145 MPH...230 KM/H  
PRESENT MOVEMENT...NW OR 325 DEGREES AT 13 MPH...20 KM/H  
MINIMUM CENTRAL PRESSURE...940 MB...27.76 INCHES  
 
 
WATCHES AND WARNINGS  
--------------------  
CHANGES WITH THIS ADVISORY:  
 
NONE.  
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:  
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...  
* BERMUDA  
 
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE  
POSSIBLE WITHIN THE WATCH AREA, GENERALLY WITHIN 48 HOURS. THIS  
TROPICAL STORM WATCH MAY BE REPLACED WITH A HURRICANE WATCH LATER  
TODAY DUE TO IMELDA.  
 
FOR STORM INFORMATION SPECIFIC TO YOUR AREA, PLEASE MONITOR  
PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.  
 
 
DISCUSSION AND OUTLOOK  
----------------------  
AT 1100 AM AST (1500 UTC), THE CENTER OF HURRICANE HUMBERTO WAS  
LOCATED BY AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT NEAR  
LATITUDE 28.0 NORTH, LONGITUDE 67.6 WEST. HUMBERTO IS MOVING TOWARD  
THE NORTHWEST NEAR 13 MPH (20 KM/H).A GRADUAL TURN TOWARDS THE  
NORTH-NORTHWEST THEN NORTH IS EXPECTED OVER THE NEXT DAY OR SO. THE  
HURRICANE IS THEN FORECAST TO TURN AND ACCELERATE EAST-NORTHEASTWARD  
BY LATE TUESDAY OR EARLY WEDNESDAY. ON THE FORECAST TRACK, THE  
CENTER OF HUMBERTO WILL PASS WEST, AND THEN NORTH OF BERMUDA ON  
TUESDAY AND WEDNESDAY.  
 
MAXIMUM SUSTAINED WINDS ARE NEAR 145 MPH (230 KM/H) WITH HIGHER  
GUSTS. HUMBERTO IS A CATEGORY 4 HURRICANE ON THE SAFFIR-SIMPSON  
HURRICANE WIND SCALE. FLUCTUATIONS IN INTENSITY ARE POSSIBLE TODAY.  
GRADUAL WEAKENING IS FORECAST AFTER THAT, BUT HUMBERTO IS EXPECTED  
TO REMAIN A DANGEROUS MAJOR HURRICANE INTO TUESDAY.  
 
HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 70 MILES (110 KM) FROM  
THE CENTER AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 185  
MILES (295 KM).  
 
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 940 MB (27.76 INCHES)  
BASED ON AIR FORCE RESERVE RECONNAISSANCE DROPSONDE DATA.  
 
 
HAZARDS AFFECTING LAND  
----------------------  
KEY MESSAGES FOR HURRICANE HUMBERTO CAN BE FOUND IN THE TROPICAL  
CYCLONE DISCUSSION UNDER AWIPS HEADER MIATCDAT3 AND WMO HEADER  
WTNT43 KNHC.  
 
SURF: SWELLS GENERATED BY HUMBERTO WILL CONTINUE TO AFFECT PORTIONS  
OF THE NORTHERN LEEWARD ISLANDS, THE VIRGIN ISLANDS, PUERTO RICO,  
AND BERMUDA THROUGH MUCH OF THIS WEEK. SWELLS FROM HUMBERTO WILL  
ALSO AFFECT THE U.S. EAST COAST BEGINNING TODAY. THESE SWELLS ARE  
LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS.  
PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.  
 
A DEPICTION OF RIP CURRENT RISK FOR THE UNITED STATES CAN BE FOUND  
AT: HURRICANES.GOV/GRAPHICS_AT3.SHTML?RIPCURRENTS  
 
WIND: TROPICAL STORM CONDITIONS ARE POSSIBLE ON BERMUDA BEGINNING  
TUESDAY.  
 
RAINFALL: HURRICANE HUMBERTO IS EXPECTED TO BRING RAINFALL OF 1 TO  
2 INCHES – 25 TO 50 MM – TO BERMUDA MONDAY NIGHT THROUGH TUESDAY  
 
 
NEXT ADVISORY  
-------------  
NEXT INTERMEDIATE ADVISORY AT 200 PM AST.  
NEXT COMPLETE ADVISORY AT 500 PM AST.  
 
 
FORECASTER KELLY  
 
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