* GFS version * * ATLANTIC 2025 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC CLIMO USED * * DEXTER AL042025 08/07/25 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 45 45 45 45 44 45 44 40 35 33 32 N/A N/A N/A N/A N/A N/A V (KT) LAND 45 45 45 45 44 45 44 40 35 33 32 N/A N/A N/A N/A N/A N/A V (KT) LGEM 45 44 43 42 40 37 34 31 30 30 30 N/A N/A N/A N/A N/A N/A Storm Type EXTP EXTP EXTP EXTP EXTP EXTP EXTP EXTP EXTP EXTP EXTP N/A N/A N/A N/A N/A N/A SHEAR (KT) 40 43 43 44 41 42 36 35 26 23 21 N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) 4 2 4 4 6 -7 -3 -4 -3 -4 -7 N/A N/A N/A N/A N/A N/A SHEAR DIR 269 266 260 250 241 228 235 240 233 227 240 N/A N/A N/A N/A N/A N/A SST (C) 26.3 25.3 24.4 22.8 22.6 20.4 20.5 19.9 19.9 19.8 19.9 N/A N/A N/A N/A N/A N/A POT. INT. (KT) 119 110 103 93 92 82 83 81 80 80 80 N/A N/A N/A N/A N/A N/A 200 MB T (C) -53.2 -53.1 -53.1 -52.9 -52.8 -53.8 -53.6 -52.9 -52.3 -51.5 -50.6 N/A N/A N/A N/A N/A N/A 200 MB VXT (C) -0.2 0.6 1.0 1.3 1.0 0.9 0.9 0.7 0.6 1.1 1.3 N/A N/A N/A N/A N/A N/A TH_E DEV (C) 2 2 2 1 1 0 0 1 1 0 0 N/A N/A N/A N/A N/A N/A 700-500 MB RH 43 41 39 36 35 37 40 49 55 56 56 N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 19 20 20 21 22 26 25 23 21 19 17 LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 13 27 23 11 21 19 18 6 -12 -1 7 N/A N/A N/A N/A N/A N/A 200 MB DIV 7 19 8 20 13 37 17 4 7 29 28 N/A N/A N/A N/A N/A N/A 700-850 TADV -7 -4 -13 -3 -17 -12 -16 -22 -8 -7 0 N/A N/A N/A N/A N/A N/A LAND (KM) 758 691 656 640 675 821 1069 1406 1593 1303 1040 N/A N/A N/A N/A N/A N/A LAT (DEG N) 39.9 40.4 40.9 41.7 42.4 44.0 45.0 45.5 46.0 46.5 47.0 N/A N/A N/A N/A N/A N/A LONG(DEG W) 55.2 53.2 51.2 49.1 47.0 43.2 39.2 34.5 30.1 26.1 22.4 N/A N/A N/A N/A N/A N/A STM SPEED (KT) 15 16 17 17 17 15 16 16 15 13 13 N/A N/A N/A N/A N/A N/A HEAT CONTENT 3 0 0 0 0 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): 85/ 15 CX,CY: 15/ 1 T-12 MAX WIND: 45 PRESSURE OF STEERING LEVEL (MB): 606 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 14.3 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 14.0 (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. -1. -2. -3. -5. -8. -9. -11. -13. -14. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR MAG 1. 2. 2. 3. 3. 1. -2. -4. -3. -2. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR ADJ -0. -0. -1. -1. -1. -0. 1. 2. 3. 4. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR DIR 0. 0. 1. 1. 3. 4. 6. 7. 8. 8. 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. -0. -0. -0. -0. 0. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. THETA_E EXCESS -0. -1. -1. -2. -3. -4. -5. -5. -6. -6. 0. 0. 0. 0. 0. 0. 700-500 MB RH 0. 0. 1. 1. 2. 3. 4. 4. 3. 3. 0. 0. 0. 0. 0. 0. MODEL VTX TENDENCY 0. 0. 1. 1. 4. 4. 2. -2. -6. -9. 0. 0. 0. 0. 0. 0. 850 MB ENV VORTICITY -0. -0. -0. -0. -0. -0. -0. -1. -1. -1. 0. 0. 0. 0. 0. 0. 200 MB DIVERGENCE -0. -0. -0. -1. -0. -0. -1. -1. -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. -1. -1. -2. -1. -1. -2. -3. 0. 0. 0. 0. 0. 0. STEERING LEVEL PRES 0. 0. 0. 0. 0. 0. 0. 0. -0. -0. 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. -2. -2. -3. -4. -4. -4. 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 -0. -0. -0. -1. 0. -1. -5. -10. -12. -13. 0. 0. 0. 0. 0. 0. CURRENT MAX WIND (KT): 45. LAT, LON: 39.9 55.2 ** 2025 ATLANTIC RI INDEX AL042025 DEXTER 08/07/25 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) : 56.9 46.9 to 6.8 0.00 0.0 HEAT CONTENT (KJ/CM2) : 0.6 0.0 to 155.1 0.00 999.0 STD DEV OF IR BR TEMP : 14.3 36.6 to 2.8 0.66 999.0 MAXIMUM WIND (KT) : 45.0 22.5 to 137.5 0.59 999.0 2nd PC OF IR BR TEMP : -1.6 2.9 to -3.0 0.76 999.0 BL DRY-AIR FLUX (W/M2) : 329.0 895.4 to -69.3 0.59 999.0 D200 (10**7s-1) : 13.4 -29.7 to 189.2 0.20 999.0 POT = MPI-VMAX (KT) : 44.6 30.0 to 151.8 0.12 999.0 %area of TPW <45 mm upshear : 95.4 100.0 to 0.0 0.05 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 2% is 0.3 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: 1.6% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 0.4% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Bayesian: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 0.7% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% DTOPS: 2.0% 2.0% 1.0% 0.0% 0.0% 0.0% 0.0% 0.0% SDCON: 1.3% 1.0% 0.5% 0.0% 0.0% 0.0% 0.0% 0.0% ## ANNULAR HURRICANE INDEX (AHI) AL042025 DEXTER 08/07/25 00 UTC ## ## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=4 NFAIL=3 ## ## 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 08/07/2025 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) 45 45 45 45 44 45 44 40 35 33 32 DIS DIS DIS DIS DIS DIS 18HR AGO 45 44 44 44 43 44 43 39 34 32 31 DIS DIS DIS DIS DIS DIS 12HR AGO 45 42 41 41 40 41 40 36 31 29 28 DIS DIS DIS DIS DIS DIS 6HR AGO 45 39 36 35 34 35 34 30 25 23 22 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