* GFS version * * ATLANTIC 2025 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC CLIMO USED * * DEXTER AL042025 08/06/25 00 UTC * TIME (HR) 0 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 V (KT) NO LAND 35 36 38 38 38 40 41 44 46 43 38 N/A N/A N/A N/A N/A N/A V (KT) LAND 35 36 38 38 38 40 41 44 46 43 38 N/A N/A N/A N/A N/A N/A V (KT) LGEM 35 35 34 33 32 29 27 27 26 25 25 N/A N/A N/A N/A N/A N/A Storm Type TROP TROP TROP EXTP EXTP EXTP EXTP EXTP EXTP EXTP EXTP N/A N/A N/A N/A N/A N/A SHEAR (KT) 36 37 39 47 51 55 52 40 38 39 39 N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) 3 2 2 -1 0 0 0 -1 -3 -4 -3 N/A N/A N/A N/A N/A N/A SHEAR DIR 278 274 264 264 270 257 235 222 245 254 255 N/A N/A N/A N/A N/A N/A SST (C) 26.9 27.1 27.3 26.8 26.1 23.6 19.5 21.5 21.3 20.3 20.9 N/A N/A N/A N/A N/A N/A POT. INT. (KT) 123 126 128 123 116 98 79 86 86 82 84 N/A N/A N/A N/A N/A N/A 200 MB T (C) -53.0 -53.2 -53.4 -53.2 -53.0 -52.9 -53.9 -53.9 -54.2 -53.9 -54.1 N/A N/A N/A N/A N/A N/A 200 MB VXT (C) -0.1 -0.3 -0.5 -0.3 -0.3 0.2 0.5 0.6 0.7 1.1 0.9 N/A N/A N/A N/A N/A N/A TH_E DEV (C) 3 3 2 3 2 1 1 0 0 0 1 N/A N/A N/A N/A N/A N/A 700-500 MB RH 40 43 45 45 43 40 34 40 44 48 53 N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 16 16 16 15 14 18 20 25 27 25 22 LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 2 -2 14 11 21 15 14 4 3 15 -6 N/A N/A N/A N/A N/A N/A 200 MB DIV 21 37 44 15 -1 18 14 21 15 -4 7 N/A N/A N/A N/A N/A N/A 700-850 TADV 1 3 -3 -7 -8 -18 -31 -38 -9 -2 1 N/A N/A N/A N/A N/A N/A LAND (KM) 616 635 637 658 700 611 603 769 1034 1343 1677 N/A N/A N/A N/A N/A N/A LAT (DEG N) 38.7 39.2 39.6 39.9 40.2 41.2 42.6 43.5 44.4 45.1 45.5 N/A N/A N/A N/A N/A N/A LONG(DEG W) 61.9 60.6 59.3 57.7 56.1 52.0 48.0 44.3 40.0 35.5 30.9 N/A N/A N/A N/A N/A N/A STM SPEED (KT) 11 11 12 13 14 17 16 15 16 16 16 N/A N/A N/A N/A N/A N/A HEAT CONTENT 11 8 4 5 3 0 0 0 0 0 0 N/A N/A N/A N/A N/A N/A FORECAST TRACK FROM OFCI INITIAL HEADING/SPEED (DEG/KT): 55/ 10 CX,CY: 8/ 6 T-12 MAX WIND: 35 PRESSURE OF STEERING LEVEL (MB): 670 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 30.1 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 38.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 0.0 INDIVIDUAL CONTRIBUTIONS TO INTENSITY CHANGE 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 -------------------------------------------------------------------------------------------- SAMPLE MEAN CHANGE 1. 2. 3. 4. 6. 8. 9. 11. 12. 12. 0. 0. 0. 0. 0. 0. SST POTENTIAL 0. -0. -0. -1. -2. -3. -4. -3. -4. -5. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR MAG 2. 4. 6. 7. 8. 5. -1. -6. -8. -10. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR ADJ -0. -0. -0. -0. 0. 0. 1. 2. 2. 3. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR DIR 0. 0. 1. 1. 2. 4. 5. 6. 7. 7. 0. 0. 0. 0. 0. 0. PERSISTENCE -0. -1. -1. -1. -0. -0. -0. -0. -0. 0. 0. 0. 0. 0. 0. 0. 200/250 MB TEMP. -0. -1. -1. -1. -1. -0. -0. 0. 1. 1. 0. 0. 0. 0. 0. 0. THETA_E EXCESS -0. -1. -1. -2. -3. -3. -4. -5. -6. -6. 0. 0. 0. 0. 0. 0. 700-500 MB RH 0. 0. 1. 1. 2. 3. 4. 4. 4. 4. 0. 0. 0. 0. 0. 0. MODEL VTX TENDENCY -0. 0. -1. -2. 0. 2. 9. 11. 8. 2. 0. 0. 0. 0. 0. 0. 850 MB ENV VORTICITY -0. -0. -0. -0. -0. -1. -1. -1. -1. -1. 0. 0. 0. 0. 0. 0. 200 MB DIVERGENCE -0. -0. -0. -0. -0. -0. -1. -0. -1. -0. 0. 0. 0. 0. 0. 0. 850-700 T ADVEC 0. -0. -0. -0. -1. -2. -2. -2. -2. -2. 0. 0. 0. 0. 0. 0. ZONAL STORM MOTION 0. 0. -0. -0. -1. -1. -1. -1. -1. -2. 0. 0. 0. 0. 0. 0. STEERING LEVEL PRES -0. -0. -0. -0. -1. -1. -0. -1. -1. -1. 0. 0. 0. 0. 0. 0. DAYS FROM CLIM. PEAK 0. 0. 0. 0. 0. 0. 0. 0. 0. 1. 0. 0. 0. 0. 0. 0. GOES PREDICTORS -1. -1. -1. -1. -1. -1. -1. -1. -1. -1. 0. 0. 0. 0. 0. 0. OCEAN HEAT CONTENT 0. 0. 0. 0. 0. 0. 0. -0. -0. -0. 0. 0. 0. 0. 0. 0. RI POTENTIAL -0. -1. -2. -3. -4. -5. -4. -2. -1. 1. 0. 0. 0. 0. 0. 0. -------------------------------------------------------------------------------------------- TOTAL CHANGE 1. 3. 3. 3. 5. 6. 9. 11. 8. 3. 0. 0. 0. 0. 0. 0. CURRENT MAX WIND (KT): 35. LAT, LON: 38.7 61.9 ** 2025 ATLANTIC RI INDEX AL042025 DEXTER 08/06/25 00 UTC ** (SHIPS-RII PREDICTOR TABLE for 30 KT OR MORE MAXIMUM WIND INCREASE IN NEXT 24-h) Predictor Value RI Predictor Range Scaled Value(0-1) % Contribution 12 HR PERSISTENCE (KT) : 0.0 -49.5 to 33.0 0.60 999.0 MULTI-LAYER SHEAR (KT) : 53.5 46.9 to 6.8 0.00 0.0 HEAT CONTENT (KJ/CM2) : 6.2 0.0 to 155.1 0.04 999.0 STD DEV OF IR BR TEMP : 30.1 36.6 to 2.8 0.19 999.0 MAXIMUM WIND (KT) : 35.0 22.5 to 137.5 0.33 999.0 2nd PC OF IR BR TEMP : -0.5 2.9 to -3.0 0.58 999.0 BL DRY-AIR FLUX (W/M2) : 276.4 895.4 to -69.3 0.64 999.0 D200 (10**7s-1) : 23.2 -29.7 to 189.2 0.24 999.0 POT = MPI-VMAX (KT) : 67.6 30.0 to 151.8 0.31 999.0 %area of TPW <45 mm upshear : 78.3 100.0 to 0.0 0.22 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 1% is 0.2 times climatological mean ( 4.9%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 0% is 0.0 times climatological mean (10.9%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 6.8%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 3.9%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 2.4%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 0% is 0.0 times climatological mean ( 4.6%) SHIPS Prob RI for 55kt/ 48hr RI threshold= 0% is 0.0 times climatological mean ( 4.7%) SHIPS Prob RI for 65kt/ 72hr RI threshold= 0% is 0.0 times climatological mean ( 5.3%) Matrix of RI probabilities ------------------------------------------------------------------------------ RI (kt / h) | 20/12 | 25/24 | 30/24 | 35/24 | 40/24 | 45/36 | 55/48 |65/72 ------------------------------------------------------------------------------ SHIPS-RII: 1.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 0.4% 0.1% 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% Bayesian: 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 0.5% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% DTOPS: 1.0% 2.0% 1.0% 0.0% 0.0% 0.0% 1.0% 0.0% SDCON: 0.7% 1.0% 0.5% 0.0% 0.0% 0.0% 0.5% 0.0% ## ANNULAR HURRICANE INDEX (AHI) AL042025 DEXTER 08/06/25 00 UTC ## ## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=2 NFAIL=5 ## ## AHI= 0 (AHI OF 100 IS BEST FIT TO ANN. STRUC., 1 IS MARGINAL, 0 IS NOT ANNULAR) ## ** PROBLTY OF AT LEAST 1 SCNDRY EYEWL FORMTN EVENT AL042025 DEXTER 08/06/2025 00 UTC ** TIME(HR) 0-12 12-24(0-24) 24-36(0-36) 36-48(0-48) CLIMO(%) 0 0( 0) 0( 0) 0( 0) <-- PROB BASED ON INTENSITY ONLY PROB(%) 0 0( 0) 0( 0) 0( 0) <-- FULL MODEL PROB (RAN NORMALLY) ** DSHIPS INTENSITY FORECAST ADJUSTED RELATIVE TO ONSET OF ERC WEAKENING PHASE ** TIME (HR) 0 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 >24HR AGO (DSHIPS) 35 36 38 38 38 40 41 44 46 43 38 DIS DIS DIS DIS DIS DIS 18HR AGO 35 34 36 36 36 38 39 42 44 41 36 DIS DIS DIS DIS DIS DIS 12HR AGO 35 32 31 31 31 33 34 37 39 36 31 DIS DIS DIS DIS DIS DIS 6HR AGO 35 29 26 25 25 27 28 31 33 30 25 DIS DIS DIS DIS DIS DIS NOW CURRENT INTENSITY < 83 KT IN 6HR INTENSITY IN 6HR < 83 KT IN 12HR INTENSITY IN 12HR < 83 KT