* GFS version * * ATLANTIC 2020 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * BETA AL222020 09/21/20 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 42 40 38 35 32 29 25 18 N/A N/A N/A N/A N/A N/A N/A V (KT) LAND 45 43 42 36 33 30 28 27 27 27 N/A N/A N/A N/A N/A N/A N/A V (KT) LGEM 45 43 40 34 32 29 28 27 27 27 27 N/A N/A N/A N/A N/A N/A Storm Type TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP TROP N/A N/A N/A N/A N/A N/A SHEAR (KT) 14 16 20 21 18 18 20 36 44 46 27 N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) 1 0 0 -1 0 2 0 -1 -1 0 3 N/A N/A N/A N/A N/A N/A SHEAR DIR 249 236 235 262 270 260 243 237 236 239 278 N/A N/A N/A N/A N/A N/A SST (C) 28.8 28.4 28.1 27.9 27.8 28.0 27.9 27.5 28.6 28.5 26.5 N/A N/A N/A N/A N/A N/A POT. INT. (KT) 147 140 135 132 130 134 133 129 145 143 118 N/A N/A N/A N/A N/A N/A ADJ. POT. INT. 125 118 112 109 107 111 112 110 123 121 101 N/A N/A N/A N/A N/A N/A 200 MB T (C) -50.9 -50.9 -50.8 -50.8 -50.6 -50.6 -50.9 -51.1 -51.8 -52.8 -53.6 N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.9 0.8 1.0 1.1 1.1 1.0 0.8 0.7 0.7 0.7 0.5 N/A N/A N/A N/A N/A N/A TH_E DEV (C) 0 2 2 1 1 4 3 5 2 5 1 N/A N/A N/A N/A N/A N/A 700-500 MB RH 54 55 53 52 51 45 45 45 44 42 40 N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 19 18 16 14 13 11 10 8 8 6 5 LOST LOST LOST LOST LOST LOST 850 MB ENV VOR -4 15 9 -5 -10 14 4 14 -10 -5 -21 N/A N/A N/A N/A N/A N/A 200 MB DIV 37 39 17 11 17 5 -4 19 0 -9 -23 N/A N/A N/A N/A N/A N/A 700-850 TADV 2 8 4 4 0 -4 0 2 0 8 22 N/A N/A N/A N/A N/A N/A LAND (KM) 105 63 17 -9 -36 -21 -10 -13 -105 -198 -359 N/A N/A N/A N/A N/A N/A LAT (DEG N) 27.8 28.0 28.2 28.4 28.6 28.8 29.1 29.8 30.7 32.0 33.6 N/A N/A N/A N/A N/A N/A LONG(DEG W) 95.5 96.0 96.4 96.5 96.7 96.2 95.3 94.0 92.4 91.1 90.0 N/A N/A N/A N/A N/A N/A STM SPEED (KT) 6 4 3 2 2 3 5 7 8 9 9 N/A N/A N/A N/A N/A N/A HEAT CONTENT 35 27 25 25 27 30 34 12 3 3 1 N/A N/A N/A N/A N/A N/A FORECAST TRACK FROM OFCI INITIAL HEADING/SPEED (DEG/KT):285/ 7 CX,CY: -6/ 2 T-12 MAX WIND: 50 PRESSURE OF STEERING LEVEL (MB): 747 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 10.3 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 24.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 1.0 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. 10. 11. 12. 12. 13. 14. 14. 15. 16. SST POTENTIAL 1. 1. 1. 2. 3. 4. 6. 8. 10. 11. 11. 11. 11. 10. 9. 8. VERTICAL SHEAR MAG 0. 1. 1. 2. 2. 1. -3. -9. -15. -20. -22. -24. -27. -29. -30. -31. VERTICAL SHEAR ADJ 0. 0. 0. 0. 0. 0. 1. 1. 2. 1. 1. 1. 1. 1. 1. 0. VERTICAL SHEAR DIR 0. 0. 0. 0. 1. 1. 2. 3. 3. 4. 4. 5. 5. 6. 5. 5. PERSISTENCE -1. -2. -2. -2. -1. -1. -1. -1. -0. -0. 0. 0. -0. -1. -2. -1. 200/250 MB TEMP. -0. -1. -1. -2. -3. -4. -4. -4. -4. -4. -5. -6. -7. -8. -8. -9. THETA_E EXCESS -0. -1. -2. -2. -3. -3. -3. -2. -2. -2. -1. -1. -1. -1. -0. 1. 700-500 MB RH 0. 0. 0. 0. 0. 1. 1. 1. 2. 2. 2. 2. 2. 2. 2. 2. MODEL VTX TENDENCY -0. -2. -3. -5. -8. -12. -16. -18. -22. -25. -26. -26. -26. -25. -24. -23. 850 MB ENV VORTICITY -0. -0. -0. -0. -1. -1. -1. -1. -1. -2. -2. -2. -2. -2. -2. -3. 200 MB DIVERGENCE 0. -0. -0. -0. -0. -1. -1. -1. -1. -1. 0. 1. 1. 1. 2. 2. 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. -0. -1. -1. -1. -1. -1. -2. -2. -3. -3. -2. -1. -1. -2. DAYS FROM CLIM. PEAK 0. -0. -0. -0. -0. 0. 0. -0. -0. -0. -0. -0. -0. -0. -1. -0. GOES PREDICTORS -1. -1. -1. -1. -2. -3. -4. -4. -5. -5. -4. -5. -5. -4. -4. -3. OCEAN HEAT CONTENT 0. 0. 0. 0. 0. 0. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. RI POTENTIAL -0. -1. -2. -2. -4. -4. -3. -1. -0. 1. 2. 3. 3. 3. 3. 3. ------------------------------------------------------------------------------ TOTAL CHANGE -2. -3. -5. -7. -10. -13. -16. -20. -27. -31. -32. -33. -34. -35. -36. -36. CURRENT MAX WIND (KT): 45. LAT, LON: 27.8 95.5 ** 2020 ATLANTIC RI INDEX AL222020 BETA 09/21/20 12 UTC ** (SHIPS-RII PREDICTOR TABLE for 30 KT OR MOREMAXIMUM WIND INCREASE IN NEXT 24-h) Predictor Value RI Predictor Range Scaled Value(0-1) % Contribution 12 HR PERSISTENCE (KT) : -5.0 -49.5 to 33.0 0.54 4.0 850-200 MB SHEAR (KT) : 17.6 30.1 to 2.3 0.45 1.3 HEAT CONTENT (KJ/CM2) : 27.8 0.0 to 151.8 0.18 0.5 STD DEV OF IR BR TEMP : 10.3 36.6 to 2.8 0.78 2.4 MAXIMUM WIND (KT) : 45.0 22.5 to 137.5 0.59 1.0 2nd PC OF IR BR TEMP : 0.3 2.9 to -2.9 0.45 0.9 BL DRY-AIR FLUX (W/M2) : 205.0 895.4 to -55.0 0.73 1.4 POT = MPI-VMAX (KT) : 69.2 27.5 to 139.6 0.37 0.3 D200 (10**7s-1) : 24.2 -29.7 to 185.9 0.25 0.1 %area of TPW <45 mm upshear : 49.8 100.0 to 0.0 0.50 0.1 SHIPS Prob RI for 20kt/ 12hr RI threshold= 6% is 1.2 times climatological mean ( 5.0%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 16% is 1.5 times climatological mean (10.9%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 12% is 1.7 times climatological mean ( 6.9%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 10% is 2.5 times climatological mean ( 3.9%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 2.5%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 11% is 2.4 times climatological mean ( 4.6%) SHIPS Prob RI for 55kt/ 48hr RI threshold= 11% is 2.3 times climatological mean ( 4.6%) SHIPS Prob RI for 65kt/ 72hr RI threshold= 0% is 0.0 times climatological mean ( 5.2%) 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: 6.1% 16.1% 12.0% 9.7% 0.0% 10.8% 10.6% 0.0% Logistic: 4.1% 9.9% 10.7% 9.6% 2.0% 3.2% 0.3% 0.0% Bayesian: 0.2% 0.0% 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 3.5% 8.7% 7.6% 6.4% 0.7% 4.7% 3.6% 0.0% DTOPS: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% ## ANNULAR HURRICANE INDEX (AHI) AL222020 BETA 09/21/20 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) ## ** PROBLTY OF AT LEAST 1 SCNDRY EYEWL FORMTN EVENT AL222020 BETA 09/21/2020 12 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 43 42 36 33 30 28 27 27 27 DIS DIS DIS DIS DIS DIS DIS 18HR AGO 45 44 43 37 34 31 29 28 28 28 DIS DIS DIS DIS DIS DIS DIS 12HR AGO 45 42 41 35 32 29 27 26 26 26 DIS DIS DIS DIS DIS DIS DIS 6HR AGO 45 39 36 35 32 29 27 26 26 26 DIS 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