* GFS version * * ATLANTIC 2021 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * JULIAN AL112021 08/30/21 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 50 51 51 51 49 46 45 48 46 43 37 32 26 17 N/A N/A N/A V (KT) LAND 50 51 51 51 49 46 45 48 46 43 37 32 26 17 N/A N/A N/A V (KT) LGEM 50 51 51 48 46 41 41 43 N/A N/A N/A N/A N/A N/A N/A N/A N/A Storm Type TROP TROP TROP TROP EXTP EXTP EXTP EXTP N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR (KT) 38 48 57 58 52 28 15 17 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) -1 -3 -10 -13 -12 0 5 -3 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 216 214 209 207 209 198 183 164 N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 26.4 25.1 23.5 22.3 21.0 16.8 12.6 9.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 122 110 98 92 86 75 70 67 N/A N/A N/A N/A N/A N/A N/A N/A N/A ADJ. POT. INT. 109 98 88 82 78 71 67 65 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -55.1 -54.9 -54.3 -53.8 -53.7 -53.1 -53.2 -52.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) -0.3 -0.4 -0.8 -0.3 -0.1 1.1 1.1 2.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 3 3 2 2 1 0 0 0 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 41 43 46 45 46 41 45 55 N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 15 15 15 15 14 14 16 21 LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 50 65 105 116 123 120 116 114 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 65 42 31 41 53 42 66 47 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV -13 -16 -22 -22 -20 -48 -40 -9 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) 1347 1322 1334 1315 1322 1220 1162 1095 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 37.3 38.9 40.5 42.3 44.1 48.6 53.2 56.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 42.8 40.8 38.9 37.7 36.5 36.4 38.0 39.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 22 22 21 20 21 23 21 19 N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 1 0 0 0 0 0 0 0 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): 55/ 21 CX,CY: 17/ 12 T-12 MAX WIND: 45 PRESSURE OF STEERING LEVEL (MB): 582 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 25.4 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 59.0 (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. 10. 11. 12. 12. 13. 14. 15. 15. 16. SST POTENTIAL 0. -1. -1. -2. -4. -7. -9. -11. -13. -14. -16. -19. -21. -22. -24. -25. VERTICAL SHEAR MAG -0. -0. -1. -2. -5. -8. -12. -18. -23. -28. -33. -38. -45. -50. -52. -53. VERTICAL SHEAR ADJ 0. 1. 2. 3. 4. 5. 5. 6. 5. 5. 4. 4. 4. 4. 3. 3. VERTICAL SHEAR DIR 0. 1. 1. 1. 3. 4. 4. 5. 6. 6. 7. 7. 8. 8. 8. 8. PERSISTENCE 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 1. 0. 200/250 MB TEMP. -0. -0. -0. 0. 1. 2. 3. 5. 5. 6. 6. 6. 6. 6. 5. 5. THETA_E EXCESS -0. -1. -1. -2. -3. -4. -4. -4. -4. -3. -1. -0. 0. 1. 3. 4. 700-500 MB RH 0. 0. 1. 1. 1. 2. 2. 2. 3. 3. 3. 3. 3. 3. 4. 3. MODEL VTX TENDENCY -0. -1. -1. -2. -3. -2. 4. 3. 2. 2. 1. 0. -1. -1. -2. -2. 850 MB ENV VORTICITY 0. 0. 1. 1. 2. 3. 3. 4. 4. 4. 5. 5. 5. 6. 7. 7. 200 MB DIVERGENCE 0. 0. 0. 0. 0. 1. 1. 1. 1. 1. 0. -0. -0. -1. -1. -2. 850-700 T ADVEC 0. -0. -0. -0. -2. -3. -3. -3. -2. -1. -1. -0. -0. -0. -0. -0. ZONAL STORM MOTION 0. 0. -0. -0. -1. -2. -2. -3. -5. -7. -8. -9. -9. -10. -10. -11. 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. -0. -0. -0. -0. -0. -1. -0. GOES PREDICTORS -0. -1. -1. -1. -0. 0. 0. 0. 1. 1. 1. 1. -0. -1. -1. -1. 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. -4. -3. -2. -0. 1. 2. 3. 3. 4. 4. 4. ------------------------------------------------------------------------------ TOTAL CHANGE 1. 1. 1. -1. -4. -5. -2. -4. -7. -13. -18. -24. -33. -38. -41. -45. CURRENT MAX WIND (KT): 50. LAT, LON: 37.3 42.8 ** 2021 ATLANTIC RI INDEX AL112021 JULIAN 08/30/21 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) : 5.0 -49.5 to 33.0 0.66 999.0 850-200 MB SHEAR (KT) : 50.6 30.1 to 2.3 0.00 0.0 HEAT CONTENT (KJ/CM2) : 0.2 0.0 to 151.8 0.00 999.0 STD DEV OF IR BR TEMP : 25.4 36.6 to 2.8 0.33 999.0 MAXIMUM WIND (KT) : 50.0 22.5 to 137.5 0.72 999.0 BL DRY-AIR FLUX (W/M2) : 265.4 895.4 to -55.0 0.66 999.0 2nd PC OF IR BR TEMP : -1.6 2.9 to -2.9 0.78 999.0 POT = MPI-VMAX (KT) : 40.9 28.3 to 146.3 0.11 999.0 D200 (10**7s-1) : 46.4 -29.7 to 185.9 0.35 999.0 %area of TPW <45 mm upshear : 69.7 100.0 to 0.0 0.30 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 2% is 0.4 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: 1.8% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 1.0% 0.1% 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% Bayesian: 0.4% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 1.1% 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% ## ANNULAR HURRICANE INDEX (AHI) AL112021 JULIAN 08/30/21 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 AL112021 JULIAN 08/30/2021 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) 50 51 51 51 49 46 45 48 46 43 37 32 26 17 DIS DIS DIS 18HR AGO 50 49 49 49 47 44 43 46 44 41 35 30 24 15 DIS DIS DIS 12HR AGO 50 47 46 46 44 41 40 43 41 38 32 27 21 DIS DIS DIS DIS 6HR AGO 50 44 41 40 38 35 34 37 35 32 26 21 15 DIS DIS DIS DIS NOW CURRENT INTENSITY < 83 KT IN 6HR INTENSITY IN 6HR < 83 KT IN 12HR INTENSITY IN 12HR < 83 KT