* ATLANTIC 2021 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * SEBASTIEN AL202019 11/20/19 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 40 40 40 41 41 44 47 41 40 40 39 39 38 38 38 37 37 V (KT) LAND 40 40 40 41 41 44 47 41 40 40 39 39 38 38 38 37 37 V (KT) LGEM 40 40 40 40 39 40 39 34 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 EXTP N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR (KT) 19 20 22 18 19 22 44 55 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) -2 0 1 2 2 3 5 -3 N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 311 301 288 272 241 235 217 220 N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 28.2 28.2 28.2 28.1 28.0 27.2 25.7 24.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 139 138 138 137 136 130 116 104 N/A N/A N/A N/A N/A N/A N/A N/A N/A ADJ. POT. INT. 127 125 125 123 123 123 110 97 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -54.9 -54.9 -54.9 -54.8 -54.9 -55.3 -54.9 -54.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.2 0.1 0.1 0.2 0.2 0.3 0.0 0.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 8 8 8 8 7 5 4 2 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 53 53 52 51 49 40 30 34 N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 13 13 13 13 13 14 16 13 LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR -23 -29 -35 -41 -4 19 29 45 N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 23 19 19 45 56 88 76 48 N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV -4 0 0 4 6 16 11 -85 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) 612 587 573 624 681 939 1498 1624 N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 20.4 21.0 21.5 22.3 23.0 24.8 28.5 32.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 60.3 60.8 61.4 61.5 61.5 59.9 56.1 52.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 8 8 7 8 9 19 25 24 N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 39 44 49 32 23 16 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):290/ 9 CX,CY: -7/ 3 T-12 MAX WIND: 40 PRESSURE OF STEERING LEVEL (MB): 691 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 21.9 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 25.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 0.8 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 1. 1. 2. 3. 4. 6. 9. 12. 14. 16. 17. 17. 17. 17. 16. 15. VERTICAL SHEAR MAG 0. 0. 1. 1. 1. -2. -9. -14. -18. -22. -24. -26. -29. -31. -33. -33. VERTICAL SHEAR ADJ 0. 0. 0. 0. -0. -1. -1. -1. -1. -1. -1. -1. -1. -1. -1. -0. VERTICAL SHEAR DIR -0. -0. -0. -0. -1. -1. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. PERSISTENCE -0. -1. -1. -1. -0. -0. -0. -0. -0. 0. 0. 0. -0. -0. -1. -0. 200/250 MB TEMP. 0. 0. 0. 0. 1. 1. 1. 1. 1. 2. 2. 3. 3. 4. 5. 6. THETA_E EXCESS -0. -0. -0. -0. -1. -1. -2. -1. -1. -1. -0. -0. 0. 0. 1. 2. 700-500 MB RH 0. 0. 0. 0. 1. 2. 3. 3. 4. 4. 4. 4. 4. 5. 5. 4. MODEL VTX TENDENCY -0. -0. -1. -1. -0. 1. -3. -3. -4. -5. -6. -7. -7. -8. -8. -8. 850 MB ENV VORTICITY -0. -0. -1. -1. -1. -1. -1. -1. -1. -1. -2. -2. -2. -2. -2. -2. 200 MB DIVERGENCE -0. -0. -0. -0. 0. 1. 1. 1. 1. 1. 0. -0. -1. -1. -1. -2. 850-700 T ADVEC 0. -0. -0. -0. 0. 0. -1. -1. -0. -0. -0. -0. -0. -0. -0. -0. ZONAL STORM MOTION -0. -0. 0. 0. 0. 0. 0. 0. 0. 1. 1. 1. 1. 0. 0. 0. STEERING LEVEL PRES -0. -0. -0. -0. -1. -1. -0. -1. -1. -1. -2. -2. -1. -1. -1. -1. DAYS FROM CLIM. PEAK -0. 0. 0. 0. -0. -0. -0. -0. -0. 0. 0. 0. 1. 2. 2. 2. GOES PREDICTORS -1. -1. -2. -2. -2. -2. -3. -3. -3. -3. -3. -4. -5. -5. -5. -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. 4. 4. ------------------------------------------------------------------------------ TOTAL CHANGE 0. 0. 1. 1. 4. 7. 1. 0. 0. -1. -0. -2. -2. -2. -3. -3. CURRENT MAX WIND (KT): 40. LAT, LON: 20.4 60.3 ** 2022 ATLANTIC RI INDEX AL202019 SEBASTIEN 11/20/19 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 2.9 850-200 MB SHEAR (KT) : 19.8 28.5 to 2.0 0.33 0.7 HEAT CONTENT (KJ/CM2) : 37.4 0.0 to 161.7 0.23 0.5 STD DEV OF IR BR TEMP : 21.9 36.6 to 2.8 0.44 0.8 MAXIMUM WIND (KT) : 40.0 22.5 to 137.5 0.46 0.7 BL DRY-AIR FLUX (W/M2) : 234.2 895.4 to -71.5 0.68 0.9 POT = MPI-VMAX (KT) : 84.4 27.0 to 140.8 0.50 0.3 2nd PC OF IR BR TEMP : 2.1 2.9 to -3.0 0.12 0.1 D200 (10**7s-1) : 32.4 -30.8 to 188.1 0.29 0.3 %area of TPW <45 mm upshear : 0.0 104.5 to 0.0 1.00 0.1 SHIPS Prob RI for 20kt/ 12hr RI threshold= 4% is 0.8 times climatological mean ( 4.9%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 11% is 1.0 times climatological mean (10.9%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 7% is 1.1 times climatological mean ( 6.8%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 5% is 1.4 times climatological mean ( 3.9%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 5% is 1.9 times climatological mean ( 2.4%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 7% is 1.4 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: 4.1% 10.9% 7.3% 5.4% 4.5% 6.6% 0.0% 0.0% Logistic: 0.3% 0.7% 0.3% 0.1% 0.0% 0.2% 0.0% 0.0% Bayesian: 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 1.5% 3.9% 2.5% 1.8% 1.5% 2.3% 0.0% 0.0% ## ANNULAR HURRICANE INDEX (AHI) AL202019 SEBASTIEN 11/20/19 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 AL202019 SEBASTIEN 11/20/2019 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) 40 40 40 41 41 44 47 41 40 40 39 39 38 38 38 37 37 18HR AGO 40 39 39 40 40 43 46 40 39 39 38 38 37 37 37 36 36 12HR AGO 40 37 36 37 37 40 43 37 36 36 35 35 34 34 34 33 33 6HR AGO 40 34 31 30 30 33 36 30 29 29 28 28 27 27 27 26 26 NOW CURRENT INTENSITY < 83 KT IN 6HR INTENSITY IN 6HR < 83 KT IN 12HR INTENSITY IN 12HR < 83 KT