* GFS version * * ATLANTIC 2021 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * IDA AL092021 09/01/21 06 UTC * TIME (HR) 0 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 V (KT) NO LAND 25 27 30 33 36 35 32 25 19 N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LAND 25 26 27 28 29 33 28 29 29 N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LGEM 25 26 27 28 29 31 29 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 EXTP EXTP EXTP N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR (KT) 17 23 33 38 45 55 62 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) 1 1 5 5 5 12 15 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 253 239 233 232 218 219 215 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 29.7 28.8 29.4 28.3 24.1 17.3 19.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 167 152 163 146 103 77 83 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A ADJ. POT. INT. 145 134 144 130 93 72 76 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -51.8 -51.8 -51.4 -51.2 -50.9 -50.6 -50.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.4 0.8 0.8 0.6 1.2 0.1 0.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 2 2 4 2 0 0 0 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 56 52 46 44 48 56 63 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 19 19 19 20 21 21 24 LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 45 60 60 47 60 133 112 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 20 26 14 30 32 53 81 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV -1 -4 0 -6 -49 16 56 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) -527 -448 -312 -152 -28 85 -9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 36.7 37.7 38.6 39.8 40.9 43.5 46.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 83.6 81.4 79.1 76.4 73.6 68.2 62.8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 17 20 22 24 24 23 23 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 5 3 4 3 0 0 0 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): 60/ 15 CX,CY: 13/ 7 T-12 MAX WIND: 20 PRESSURE OF STEERING LEVEL (MB): 612 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 7.8 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 27.0 (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 0. -0. 0. 1. 4. 7. 11. 15. 19. 21. 22. 22. 23. 23. 22. 21. VERTICAL SHEAR MAG 2. 5. 7. 9. 10. 3. -9. -20. -29. -40. -48. -56. -68. -75. -79. -79. VERTICAL SHEAR ADJ -0. -0. -1. -1. -3. -5. -6. -7. -6. -6. -5. -5. -5. -4. -4. -3. VERTICAL SHEAR DIR 0. 1. 1. 2. 3. 5. 6. 7. 8. 9. 10. 11. 13. 13. 12. 12. PERSISTENCE 1. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 1. 1. 1. 200/250 MB TEMP. -0. -1. -1. -1. -3. -4. -4. -4. -4. -5. -5. -6. -7. -7. -8. -8. 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. 0. 0. 0. 0. 0. 0. -0. -0. -0. -0. -0. -1. -1. -1. MODEL VTX TENDENCY -0. -0. 0. 1. 1. 3. 3. 2. 1. 1. -0. -1. -2. -2. -3. -3. 850 MB ENV VORTICITY 0. 0. 0. 0. 1. 2. 2. 3. 3. 3. 4. 4. 4. 4. 5. 5. 200 MB DIVERGENCE -0. -0. -0. -0. -0. 0. 0. 0. 0. 0. 0. -0. -0. -0. -0. -1. 850-700 T ADVEC 0. -0. -0. -0. -1. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. ZONAL STORM MOTION 0. 0. -0. -0. -1. -2. -2. -2. -4. -5. -7. -7. -8. -8. -9. -9. 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. -1. -1. -1. GOES PREDICTORS -1. -1. -0. -1. -2. -3. -4. -5. -6. -6. -6. -6. -6. -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 2. 5. 8. 11. 10. 7. 0. -6. -12. -18. -24. -30. -40. -45. -47. -46. CURRENT MAX WIND (KT): 25. LAT, LON: 36.7 83.6 ** 2021 ATLANTIC RI INDEX AL092021 IDA 09/01/21 06 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) : 31.4 30.1 to 2.3 0.00 0.0 HEAT CONTENT (KJ/CM2) : 3.0 0.0 to 151.8 0.02 999.0 STD DEV OF IR BR TEMP : 7.8 36.6 to 2.8 0.85 999.0 MAXIMUM WIND (KT) : 25.0 22.5 to 137.5 0.07 999.0 BL DRY-AIR FLUX (W/M2) : 134.0 895.4 to -55.0 0.80 999.0 2nd PC OF IR BR TEMP : -0.6 2.9 to -2.9 0.61 999.0 POT = MPI-VMAX (KT) : 104.0 28.3 to 146.3 0.64 999.0 D200 (10**7s-1) : 24.4 -29.7 to 185.9 0.25 999.0 %area of TPW <45 mm upshear : 34.5 100.0 to 0.0 0.65 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 4% is 0.9 times climatological mean ( 4.9%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 8% is 0.7 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: 4.4% 8.2% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 2.4% 1.2% 1.3% 0.6% 0.0% 0.1% 0.0% 0.0% Bayesian: 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 2.3% 3.1% 0.4% 0.2% 0.0% 0.0% 0.0% 0.0% DTOPS: 999.0% 999.0% 999.0% 999.0% 999.0% 999.0% 999.0% 999.0% ## ANNULAR HURRICANE INDEX (AHI) AL092021 IDA 09/01/21 06 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 AL092021 IDA 09/01/2021 06 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) 25 26 27 28 29 33 28 29 29 DIS DIS DIS DIS DIS DIS DIS DIS 18HR AGO 25 24 25 26 27 31 26 27 27 DIS DIS DIS DIS DIS DIS DIS DIS 12HR AGO 25 22 21 22 23 27 22 23 23 DIS DIS DIS DIS DIS DIS DIS DIS 6HR AGO 25 19 16 15 16 20 15 16 16 DIS 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