* ATLANTIC 2021 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * IMELDA AL112019 09/18/19 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 30 31 33 34 35 38 40 44 45 45 44 45 48 51 51 52 51 V (KT) LAND 30 29 28 27 27 27 27 27 27 27 27 27 27 27 27 27 27 V (KT) LGEM 30 29 28 27 27 27 27 N/A 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 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR (KT) 10 13 17 16 21 33 38 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) -5 -6 -7 -6 -3 -4 -1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 280 287 295 291 276 293 293 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 30.6 30.8 31.0 31.1 31.1 31.2 31.2 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 169 169 169 168 168 168 168 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A ADJ. POT. INT. 151 152 155 155 154 156 154 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -52.7 -52.7 -52.9 -52.8 -52.7 -52.8 -52.3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.1 0.0 -0.1 0.1 0.1 0.3 0.7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 11 8 7 11 11 7 10 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 46 43 46 47 49 49 55 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 10 9 10 9 8 8 7 LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR -68 -85 -63 -35 -50 -55 -51 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 6 -2 -15 -7 4 5 40 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV 8 6 5 5 5 0 10 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) -66 -109 -152 -187 -223 -284 -361 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 29.6 30.1 30.5 30.9 31.2 31.8 32.5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 95.5 95.5 95.5 95.6 95.6 95.7 95.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 6 4 4 4 3 4 3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 19 6 6 6 6 6 6 N/A 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):350/ 6 CX,CY: 0/ 6 T-12 MAX WIND: 30 PRESSURE OF STEERING LEVEL (MB): 673 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 12.2 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 69.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 0.5 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. -0. -0. 0. 3. 8. 14. 19. 24. 28. 32. 37. 41. 43. 45. 44. VERTICAL SHEAR MAG 1. 3. 4. 5. 6. 3. -2. -6. -9. -13. -16. -19. -23. -25. -26. -26. VERTICAL SHEAR ADJ 0. 1. 2. 2. 3. 5. 6. 7. 6. 6. 5. 5. 5. 4. 4. 3. VERTICAL SHEAR DIR 0. 0. 0. 0. 1. 1. 2. 2. 2. 2. 3. 3. 3. 3. 3. 3. PERSISTENCE -0. -1. -1. -1. -0. -0. -0. -0. -0. 0. 0. 0. -0. -0. -1. -0. 200/250 MB TEMP. -0. -1. -1. -1. -2. -2. -2. -2. -2. -2. -2. -2. -2. -2. -1. -0. THETA_E EXCESS 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. -0. -0. -0. -0. 700-500 MB RH 0. 0. 0. 1. 1. 1. 1. 1. 2. 2. 2. 2. 2. 2. 2. 2. MODEL VTX TENDENCY -0. -0. -1. -2. -3. -6. -7. -9. -10. -11. -12. -12. -12. -12. -12. -12. 850 MB ENV VORTICITY -0. -1. -1. -1. -2. -3. -4. -4. -4. -5. -5. -6. -6. -7. -8. -8. 200 MB DIVERGENCE -0. -0. -1. -1. -1. -1. -1. -1. -1. -1. -0. 0. 1. 1. 1. 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. -1. -1. -1. -2. -2. -2. -2. -3. -3. STEERING LEVEL PRES -0. -0. -0. -0. -0. -0. -0. -0. -1. -1. -1. -1. -1. -1. -1. -1. DAYS FROM CLIM. PEAK 0. -0. -0. -0. 0. 0. 0. 0. 0. -0. -0. -0. -0. -1. -1. -1. GOES PREDICTORS 0. 1. 1. 1. 0. -0. -1. -1. -2. -2. -2. -1. -1. -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. -2. -4. -4. -3. -1. -0. 1. 2. 3. 3. 3. 4. 4. ------------------------------------------------------------------------------ TOTAL CHANGE 1. 3. 4. 5. 8. 10. 14. 15. 15. 14. 15. 18. 21. 21. 22. 21. CURRENT MAX WIND (KT): 30. LAT, LON: 29.6 95.5 ** 2022 ATLANTIC RI INDEX AL112019 IMELDA 09/18/19 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 3.1 850-200 MB SHEAR (KT) : 15.5 28.5 to 2.0 0.49 1.1 HEAT CONTENT (KJ/CM2) : 8.6 0.0 to 161.7 0.05 0.1 STD DEV OF IR BR TEMP : 12.2 36.6 to 2.8 0.72 1.4 MAXIMUM WIND (KT) : 30.0 22.5 to 137.5 0.20 0.3 BL DRY-AIR FLUX (W/M2) : 119.8 895.4 to -71.5 0.80 1.2 POT = MPI-VMAX (KT) : 123.3 27.0 to 140.8 0.85 0.6 2nd PC OF IR BR TEMP : 1.3 2.9 to -3.0 0.26 0.3 D200 (10**7s-1) : -2.8 -30.8 to 188.1 0.13 0.1 %area of TPW <45 mm upshear : 23.5 104.5 to 0.0 0.78 0.1 SHIPS Prob RI for 20kt/ 12hr RI threshold= 5% is 1.0 times climatological mean ( 4.9%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 13% is 1.2 times climatological mean (10.9%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 8% is 1.2 times climatological mean ( 6.8%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 6% is 1.6 times climatological mean ( 3.9%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 5% is 2.2 times climatological mean ( 2.4%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 7% is 1.5 times climatological mean ( 4.6%) SHIPS Prob RI for 55kt/ 48hr RI threshold= 5% is 1.1 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: 4.8% 13.4% 8.4% 6.1% 5.2% 7.0% 5.2% 0.0% Logistic: 3.9% 24.8% 19.9% 14.2% 4.5% 8.8% 2.6% 1.0% Bayesian: 0.2% 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 3.0% 12.8% 9.5% 6.8% 3.2% 5.3% 2.6% 0.3% ## ANNULAR HURRICANE INDEX (AHI) AL112019 IMELDA 09/18/19 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 AL112019 IMELDA 09/18/2019 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) 30 29 28 27 27 27 27 27 27 27 27 27 27 27 27 27 27 18HR AGO 30 29 28 27 27 27 27 27 27 27 27 27 27 27 27 27 27 12HR AGO 30 27 26 25 25 25 25 25 25 25 25 25 25 25 25 25 25 6HR AGO 30 24 21 20 20 20 20 20 20 20 20 20 20 20 20 20 20 NOW CURRENT INTENSITY < 83 KT IN 6HR INTENSITY IN 6HR < 83 KT IN 12HR INTENSITY IN 12HR < 83 KT