756
WTPZ42 KNHC 230900
TCDEP2
HURRICANE VANCE DISCUSSION NUMBER 8
NWS NATIONAL HURRICANE CENTER MIAMI FL EP222026
300 AM CST FRI OCT 23 2026
SATELLITE IMAGERY INDICATES THAT VANCE HAS BECOME INCREASINGLY WELL
ORGANIZED DURING THE PAST SEVERAL HOURS, WITH DEEP CONVECTION
WRAPPING TIGHTLY AROUND THE INNER-CORE REGION. RECENT MICROWAVE
IMAGERY CONFIRMS THIS IMPROVEMENT IN THE INNER-CORE, SHOWING A
COMPLETE CONVECTIVE RING SURROUNDING THE CENTER. THE SUBJECTIVE
DVORAK INTENSITY ESTIMATE FROM TAFB WAS T4.5/77 KT, WITH OBJECTIVE
AIDS RECENTLY EXCEEDING 70 KT. GIVEN THESE ESTIMATES AND THE
IMPROVED SATELLITE PRESENTATION, THE INITIAL INTENSITY IS RAISED TO
75 KT, MAKING VANCE A CATEGORY 1 HURRICANE.
VANCE HAS TURNED NORTH-NORTHWESTWARD (330/5 KT) AND SHOULD MAINTAIN
THIS GENERAL HEADING AS THE RIDGE TO THE NORTH WEAKENS IN RESPONSE
TO AN UPPER-LEVEL TROUGH OVER THE SOUTHWESTERN UNITED STATES. THE
TRACK GUIDANCE REMAINS IN RELATIVELY GOOD AGREEMENT THROUGH ABOUT 60
H. THEREAFTER, THE TROUGH IS FORECAST TO SHIFT EASTWARD, LEAVING
VANCE IN A REGION OF WEAK STEERING CURRENTS AND RESULTING IN
INCREASING CROSS-TRACK SPREAD AMONG THE MODEL SOLUTIONS.
CONSEQUENTLY, FORECAST CONFIDENCE DURING THIS PERIOD REMAINS LOWER
THAN NORMAL. THE NHC TRACK FORECAST REMAINS LARGELY UNCHANGED FROM
THE PREVIOUS ADVISORY AND LIES CLOSE TO THE GDMI AND HCCA AIDS.
RAPID INTENSIFICATION APPEARS TO BE UNDERWAY, AND ENVIRONMENTAL
CONDITIONS ARE EXPECTED TO REMAIN FAVORABLE FOR ADDITIONAL
STRENGTHENING, CHARACTERIZED BY WARM SSTS, LOW VERTICAL WIND SHEAR,
AND PLENTY OF MID-LEVEL MOISTURE. RI IS EXPECTED TO CONTINUE DURING
THE NEXT 24 H, BRINGING VANCE TO MAJOR HURRICANE STATUS BY TONIGHT.
THEREAFTER, VANCE IS FORECAST TO ENCOUNTER COOLER SEA SURFACE
TEMPERATURES, LIKELY DUE TO UPWELLING CAUSED BY RECENT TROPICAL
CYCLONES, ALONG WITH INCREASING VERTICAL WIND SHEAR. THESE FACTORS
SHOULD LIMIT FURTHER STRENGTHENING AND SUPPORT GRADUAL WEAKENING BY
THE END OF THE FORECAST. THE NHC INTENSITY FORECAST REMAINS SIMILAR
TO THE PREVIOUS ADVISORY AND LIES NEAR THE UPPER END OF THE MODEL
GUIDANCE THROUGH MUCH OF THE FORECAST PERIOD.
FORECAST POSITIONS AND MAX WINDS
INIT 23/0900Z 10.9N 102.1W 75 KT 85 MPH
12H 23/1800Z 11.5N 102.5W 85 KT 100 MPH
24H 24/0600Z 12.4N 103.0W 100 KT 115 MPH
36H 24/1800Z 13.4N 103.4W 100 KT 115 MPH
48H 25/0600Z 14.5N 103.8W 90 KT 105 MPH
60H 25/1800Z 15.6N 104.0W 90 KT 105 MPH
72H 26/0600Z 16.4N 104.4W 90 KT 105 MPH
96H 27/0600Z 17.0N 104.6W 90 KT 105 MPH
120H 28/0600Z 17.8N 104.7W 75 KT 85 MPH
FORECASTER PIERCE/GIBBS
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