532  
AXPZ20 KNHC 301544  
TWDEP  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
1605 UTC MON JUN 30 2025  
 
TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM  
03.4S TO 30N, EAST OF 120W INCLUDING THE GULF OF CALIFORNIA, AND  
FROM THE EQUATOR TO 30N, BETWEEN 120W AND 140W. THE FOLLOWING  
INFORMATION IS BASED ON SATELLITE IMAGERY, WEATHER OBSERVATIONS,  
RADAR, AND METEOROLOGICAL ANALYSIS.  
 
BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH  
1500 UTC.  
   
..SPECIAL FEATURES  
 
TROPICAL STORM FLOSSIE IS CENTERED NEAR 15.6N 102.6W AT 30/1500  
UTC, MOVING NORTHWEST AT 9 KT. A WEST-NORTHWEST TO NORTHWEST  
MOTION SHOULD CONTINUE OVER THE NEXT FEW DAYS. ESTIMATED MINIMUM  
CENTRAL PRESSURE IS 998 MB. MAXIMUM SUSTAINED WIND SPEED IS 50  
KT WITH GUSTS TO 60 KT. PEAK SEAS ARE 15 FT. NUMEROUS MODERATE TO  
STRONG CONVECTION IS NOTED FROM 14N TO 16N BETWEEN 100W AND  
105W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION, IN BANDS,  
IS ELSEWHERE FROM 10N TO 18N BETWEEN 98W AND 106W. FLOSSIE IS A  
LITTLE STRONGER. STEADY-TO-RAPID STRENGTHENING IS FORECAST DURING  
THE NEXT COUPLE OF DAYS, AND THE SYSTEM IS EXPECTED TO BECOME A  
HURRICANE TONIGHT OR TUESDAY. TROPICAL STORM FLOSSIE IS EXPECTED TO  
PRODUCE RAINFALL TOTALS OF 3 TO 6 INCHES, WITH ISOLATED MAXIMUM  
TOTALS OF 10 INCHES, ACROSS PORTIONS OF THE MEXICAN STATES OF  
OAXACA, GUERRERO, MICHOACAN, COLIMA, AND JALISCO THROUGH  
WEDNESDAY. THIS RAINFALL MAY LEAD TO AREAS OF LIFE-THREATENING  
FLOODING AND MUDSLIDES, ESPECIALLY IN AREAS OF STEEP TERRAIN.  
SWELLS GENERATED BY FLOSSIE WILL AFFECT PORTIONS OF THE COAST OF  
SOUTHWESTERN MEXICO DURING THE NEXT FEW DAYS. THESE SWELLS ARE  
LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS.  
PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.  
 
PLEASE READ THE LATEST HIGH SEAS FORECAST ISSUED BY THE  
NATIONAL HURRICANE CENTER AT WEBSITE -  
HTTPS://WWW.NHC.NOAA.GOV/TEXT/MIAHSFEP2.SHTML AND THE LATEST  
FLOSSIE NHC FORECAST/ADVISORY AND PUBLIC ADVISORY AT  
WWW.HURRICANES.GOV FOR MORE DETAILS.  
   
..INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH  
 
THE MONSOON TROUGH EXTENDS FROM 10N85W TO 11N94W, THEN CONTINUES  
W OF T.S. FLOSSIE FROM 14N112W TO 08N140W. ASIDE FROM THE CONVECTION  
RELATED TO T.S. FLOSSIE, SCATTERED MODERATE TO ISOLATED STRONG  
CONVECTION IS OBSERVED FROM 04N TO 08N E OF 81W TO THE COAST OF  
COLOMBIA, AND FROM 09N TO 14N BETWEEN 111W AND 120W.  
   
..OFFSHORE WATERS WITHIN 250 NM OF MEXICO  
 
PLEASE, REFER TO THE SPECIAL FEATURES SECTION ABOVE FOR DETAILS  
ON TROPICAL STORM FLOSSIE.  
 
ELSEWHERE, A RIDGE DOMINATES THE OFFSHORE FORECAST WATERS OF  
BAJA CALIFORNIA, SUPPORTING MODERATE TO LOCALLY FRESH NW WINDS.  
FRESH TO LOCALLY STRONG NW WINDS ARE IN THE VICINITY OF CABO SAN  
LUCAS. LIGHT WESTERLY WINDS ARE SEEN IN THE GULF OF CALIFORNIA.  
LATEST SCATTEROMETER DATA SHOWED MODERATE TO FRESH E WINDS IN THE  
GULF OF TEHUANTEPEC. OUTSIDE OF FLOSSIE, SEAS ARE MODERATE IN  
MIXED SWELL.  
 
FOR THE FORECAST, TROPICAL STORM FLOSSIE WILL MOVE TO 16.5N  
103.8W THIS EVENING, STRENGTHEN TO A HURRICANE NEAR 17.4N 105.4W  
TUE MORNING, 18.2N 106.9W TUE EVENING, 19.2N 108.2W WED MORNING,  
20.0N 109.3W WED EVENING, AND WEAKEN TO A TROPICAL STORM NEAR  
20.9N 110.4W THU MORNING. FLOSSIE WILL BECOME POST-TROPICAL AS IT  
MOVES TO NEAR 23.0N 112.6W EARLY FRI. OTHERWISE, A STRENGTHENING  
SURFACE RIDGE N OF THE AREA SHOULD INDUCE FRESH TO STRONG SE  
WINDS IN THE GULF OF CALIFORNIA BY THE MIDDLE OF THE WEEK.  
 
...OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA,  
AND WITHIN 750 NM OF ECUADOR...  
 
A RIDGE POSITIONED NORTH OF THE AREA SUPPORTS FRESH TO LOCALLY  
STRONG NE TO E WINDS ACROSS THE GULF OF PAPAGAYO, AND DOWNWIND  
TO ABOUT 89W. SEAS ARE 5 TO 7 FT WITHIN THESE WINDS. MEANWHILE,  
LATEST SATELLITE-DERIVED WIND DATA SHOW MODERATE TO LOCALLY  
FRESH SOUTHERLY WINDS SOUTH OF 05N, AND LIGHT AND VARIABLE WINDS  
N OF 05N. SLIGHT TO MODERATE SEAS DOMINATE THE REMAINDER OF THE  
OFFSHORE FORECAST WATERS, WITH THE HIGHEST SEAS OF 5 TO 7 FT  
BETWEEN ECUADOR AND THE GALAPAGOS ISLANDS.  
 
FOR THE FORECAST, PULSING FRESH TO STRONG NE TO E WINDS ARE  
FORECAST, MAINLY AT NIGHT, IN THE PAPAGAYO REGION THROUGH AT  
LEAST WED. ELSEWHERE, GENTLE TO MODERATE WINDS AND MODERATE SEAS  
IN SOUTHERLY SWELL ARE EXPECTED. MODERATE TO ROUGH CROSS  
EQUATORIAL S TO SW SWELL WILL AFFECT THE WATERS BETWEEN ECUADOR  
AND THE GALAPAGOS ISLANDS OVER THE NEXT SEVERAL DAYS.  
   
..REMAINDER OF THE AREA  
 
THE REMAINDER OF THE EASTERN PACIFIC REGION IS UNDER THE INFLUENCE  
OF A 1028 MB HIGH PRESSURE SYSTEM CENTERED NEAR 40N138W. ITS  
ASSOCIATED RIDGE DOMINATES THE WATERS N OF THE ITCZ/MONSOON  
TROUGH AND W OF 110W. THE PRESSURE GRADIENT BETWEEN THE RIDGE AND  
THE MONSOON TROUGH CURRENTLY SUPPORTS AN AREA OF MODERATE TO  
FRESH NE WINDS N OF THE MONSOON TROUGH TO ABOUT 16N BETWEEN 115W  
AND 119W. ELSEWHERE UNDER THE INFLUENCE OF THE RIDGE, GENTLE TO  
MODERATE WINDS PREVAIL. MODERATE TO LOCALLY FRESH SOUTHERLY WINDS  
ARE OBSERVED S OF THE MONSOON TROUGH. SEAS ARE IN GENERAL 4 TO 6  
FT.  
 
FOR THE FORECAST, A RIDGE WILL REMAIN IN CONTROL OF THE WEATHER  
PATTERN ACROSS THE REGION, WITH LITTLE CHANGE IN WINDS AND SEAS  
THROUGH TUE NIGHT. BY WED MORNING, SEAS GENERATED BY STRONG  
WINDS OFFSHORE THE STATE OF CALIFORNIA WILL PROPAGATE ACROSS THE  
NORTHERN FORECAST WATERS, BUILDING SEAS TO 8 TO 9 FT ACROSS MOST  
OF THE AREA N OF 28N BETWEEN 120W AND 128W BY THU NIGHT, AND N  
OF 26N BETWEEN 119W AND 128W BY FRI MORNING.  
 
 
GR  
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