846  
WTPZ41 KNHC 010847  
TCDEP1  
 
HURRICANE FLOSSIE DISCUSSION NUMBER 9  
NWS NATIONAL HURRICANE CENTER MIAMI FL EP062025  
300 AM CST TUE JUL 01 2025  
 
FLOSSIE CONTINUES TO STRENGTHEN EARLY THIS MORNING, EVIDENT BY AN  
EXPANDING CENTRAL DENSE OVERCAST (CDO) OVER THE LOW-LEVEL CENTER OF  
THE CYCLONE. A COUPLE RECENT SCATTEROMETER PASSES AT 0337Z AND  
0428Z HELPED IN LOCATING THE CENTER UNDERNEATH THE CDO, AND ASSISTED  
WITH THE REFINEMENT OF THE 34 AND 50 KNOT WIND RADII. THE LATEST  
SUBJECTIVE DVORAK INTENSITY ESTIMATES CAME IN AT T4.0/65 KNOTS FROM  
BOTH SAB AND TAFB. THE OBJECTIVE INTENSITY ESTIMATES RANGED FROM 69  
TO 79 KNOTS AT 06Z. BASED ON A BLEND OF THESE ESTIMATES, AND TAKING  
INTO ACCOUNT THE IMPROVED SATELLITE PRESENTATION DURING THE PAST FEW  
HOURS, THE INITIAL INTENSITY HAS BEEN RAISED TO 75 KNOTS FOR THIS  
ADVISORY.  
 
FLOSSIE IS HEADING TOWARD THE WEST-NORTHWEST OR 300/09 KNOTS. THIS  
MOTION IS EXPECTED TO CONTINUE DURING THE NEXT SEVERAL DAYS WITH A  
SLIGHT DECREASE IN FORWARD SPEED, AS THE CYCLONE IS STEERED INTO A  
WEAKNESS IN THE MID-LEVEL RIDGE TO THE NORTHWEST OF THE SYSTEM. THE  
TRACK FORECAST IS VERY CLOSE TO THE PREVIOUS ADVISORY AND IS CLOSELY  
ALIGNED WITH A BLEND OF THE LATEST HCCA, TVCE, AND FSSE CONSENSUS  
AIDS AS WELL AS THE LATEST EC-AIFS RUN.  
 
THE ENVIRONMENT WILL REMAIN VERY CONDUCIVE FOR STRENGTHENING DURING  
THE NEXT 24 TO 36 HOURS, WITH WARM SEA SURFACE TEMPERATURES OF  
28/29C, ABUNDANT MID-LEVEL MOISTURE, AND LIGHT VERTICAL WIND SHEAR.  
THE LATEST SHIPS RI PROBABILITIES SHOW A GREATER THAN 40 PERCENT  
CHANCE OF A 25-KNOT INCREASE IN 24 HOURS, AND THE OFFICIAL FORECAST  
REFLECTS THIS. RAPID WEAKENING WILL THEN BEGIN BY 48 HOURS AS  
FLOSSIE MOVES OVER PROGRESSIVELY COOLER WATER AND BEGINS TO ENTRAIN  
DRY MID-LEVEL AIR. THE SYSTEM IS FORECAST TO BECOME A POST-TROPICAL  
LOW BY 72 HOURS AND A REMNANT LOW AT 96 HOURS. THE INTENSITY  
FORECAST IS ON THE HIGH END OF THE INTENSITY AIDS, CLOSEST TO SHIPS  
AND NNIC.  
 
 
KEY MESSAGES:  
 
1. THE OUTER BANDS OF HURRICANE FLOSSIE SHOULD BRING LOCALLY HEAVY  
RAINFALL TO COASTAL PORTIONS OF THE MEXICAN STATES OF GUERRERO,  
MICHOACáN, COLIMA, AND JALISCO THROUGH WEDNESDAY. LIFE-THREATENING  
FLOODING AND MUDSLIDES ARE POSSIBLE, PARTICULARLY IN STEEP TERRAIN.  
 
2. TROPICAL STORM CONDITIONS ARE EXPECTED IN PORTIONS OF THE  
TROPICAL STORM WARNING AREA IN SOUTHWESTERN MEXICO, THROUGH TODAY.  
 
 
FORECAST POSITIONS AND MAX WINDS  
 
INIT 01/0900Z 16.9N 105.1W 75 KT 85 MPH  
12H 01/1800Z 17.5N 106.2W 85 KT 100 MPH  
24H 02/0600Z 18.4N 107.7W 95 KT 110 MPH  
36H 02/1800Z 19.2N 109.0W 95 KT 110 MPH  
48H 03/0600Z 20.0N 110.2W 75 KT 85 MPH  
60H 03/1800Z 20.9N 111.3W 55 KT 65 MPH  
72H 04/0600Z 21.9N 112.5W 40 KT 45 MPH...POST-TROPICAL  
96H 05/0600Z 23.7N 114.9W 30 KT 35 MPH...POST-TROP/REMNT LOW  
120H 06/0600Z 24.0N 118.0W 20 KT 25 MPH...POST-TROP/REMNT LOW  
 
 
FORECASTER JELSEMA  
 
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