* GFS version * * EAST PACIFIC 2024 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * ALVIN EP012025 05/30/25 12 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 43 39 36 30 22 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LAND 45 43 39 36 30 22 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LGEM 45 42 39 35 30 23 18 16 N/A N/A N/A N/A N/A N/A N/A N/A N/A Storm Type TROP TROP TROP TROP TROP TROP TROP TROP N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR (KT) 17 20 28 27 28 32 38 43 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) 6 4 0 0 -1 -2 -3 0 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 195 192 194 198 201 208 223 231 N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 27.8 26.9 25.8 24.6 23.9 23.2 25.2 26.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 142 132 121 108 101 94 114 130 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -52.3 -52.2 -52.1 -52.3 -52.6 -52.7 -53.2 -52.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.2 0.2 0.2 0.2 0.1 0.0 -0.1 0.0 N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 3 2 2 2 2 3 2 6 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 56 54 50 46 45 39 36 32 N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 19 19 17 16 13 9 5 2 LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 32 28 27 24 12 12 -4 31 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 72 55 34 39 23 15 11 10 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV 6 11 12 14 9 2 6 -4 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) 465 440 418 392 311 123 1 45 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 17.0 17.8 18.6 19.4 20.2 21.9 23.6 25.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 108.6 108.9 109.2 109.3 109.4 109.6 109.6 109.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 8 8 8 8 9 9 9 9 N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 7 4 2 1 0 0 1 4 N/A N/A N/A N/A N/A N/A N/A N/A N/A FORECAST TRACK FROM OFCI INITIAL HEADING/SPEED (DEG/KT):325/ 9 CX,CY: -4/ 7 T-12 MAX WIND: 50 PRESSURE OF STEERING LEVEL (MB): 734 (MEAN=586) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 18.7 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 63.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 0.1 INDIVIDUAL CONTRIBUTIONS TO INTENSITY CHANGE 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 -------------------------------------------------------------------------------------------- SAMPLE MEAN CHANGE 0. 1. 1. 1. 2. 2. 2. 0. 0. 0. 0. 0. 0. 0. 0. 0. SST POTENTIAL 1. 1. 1. 1. -1. -3. -4. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR MAG -0. -0. -1. -1. -1. -0. -0. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR ADJ -0. -1. -1. -1. -0. 0. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR DIR -0. -0. -1. -1. -1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. PERSISTENCE -1. -2. -2. -3. -2. -2. -2. 0. 0. 0. 0. 0. 0. 0. 0. 0. 200/250 MB TEMP. -0. -0. -0. -0. -1. -1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. THETA_E EXCESS -0. -1. -2. -2. -4. -6. -6. 0. 0. 0. 0. 0. 0. 0. 0. 0. 700-500 MB RH -0. -0. -0. -1. -1. -2. -2. 0. 0. 0. 0. 0. 0. 0. 0. 0. MODEL VTX TENDENCY -0. -1. -2. -5. -8. -14. -21. 0. 0. 0. 0. 0. 0. 0. 0. 0. 850 MB ENV VORTICITY 0. 0. 0. -0. -0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 200 MB DIVERGENCE 0. 0. 0. 0. -0. -0. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 850-700 T ADVEC -0. -0. -0. -0. -0. -0. -0. 0. 0. 0. 0. 0. 0. 0. 0. 0. ZONAL STORM MOTION 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. STEERING LEVEL PRES 0. 0. 1. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. DAYS FROM CLIM. PEAK -0. -0. -0. -0. -0. -1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. GOES PREDICTORS -0. -1. -1. -1. -1. -1. -2. 0. 0. 0. 0. 0. 0. 0. 0. 0. OCEAN HEAT CONTENT 0. -0. -0. -0. -0. -1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. RI POTENTIAL -0. -1. -2. -3. -4. -4. -3. 0. 0. 0. 0. 0. 0. 0. 0. 0. -------------------------------------------------------------------------------------------- TOTAL CHANGE -2. -6. -9. -15. -23. -32. -38. 0. 0. 0. 0. 0. 0. 0. 0. 0. CURRENT MAX WIND (KT): 45. LAT, LON: 17.0 108.6 ** 2024 E. PACIFIC RI INDEX EP012025 ALVIN 05/30/25 12 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 POT = MPI-VMAX (KT) : 75.7 36.9 to 148.5 0.35 999.0 12 HR PERSISTENCE (KT) : -5.0 -22.0 to 44.0 0.26 999.0 MULTI-LAYER SHEAR (KT) : 34.1 34.9 to 8.5 0.03 999.0 BL DRY-AIR FLUX (W/M2) : 282.8 800.8 to -82.5 0.59 999.0 D200 (10**7s-1) : 44.6 -33.0 to 170.5 0.38 999.0 MAXIMUM WIND (KT) : 45.0 22.5 to 132.0 0.64 999.0 STD DEV OF IR BR TEMP : 18.7 37.8 to 2.1 0.54 999.0 HEAT CONTENT (KJ/CM2) : 2.8 2.7 to 107.8 0.00 999.0 %area of TPW <45 mm upshear : 68.1 58.2 to 0.0 0.00 0.0 2nd PC OF IR BR TEMP : -0.1 2.2 to -2.3 0.52 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 0% is 0.0 times climatological mean ( 6.3%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 0% is 0.0 times climatological mean (12.5%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 8.6%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 6.2%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 4.2%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 0% is 0.0 times climatological mean ( 6.7%) SHIPS Prob RI for 55kt/ 48hr RI threshold= 0% is 0.0 times climatological mean ( 5.9%) SHIPS Prob RI for 65kt/ 72hr RI threshold= 0% is 0.0 times climatological mean ( 4.7%) 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: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 0.0% 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: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% DTOPS: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% SDCON: 0% 0% 0% 0% 0% 0% 0% 0% ## ANNULAR HURRICANE INDEX (AHI) EP012025 ALVIN 05/30/25 12 UTC ## ## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=3 NFAIL=4 ## ## AHI= 0 (AHI OF 100 IS BEST FIT TO ANN. STRUC., 1 IS MARGINAL, 0 IS NOT ANNULAR) ##