* EAST PACIFIC 2021 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * LOWELL EP172020 09/25/20 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 35 32 30 28 26 22 15 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LAND 35 32 30 28 26 22 15 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LGEM 35 33 30 28 26 22 19 17 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 TROP TROP TROP TROP TROP TROP N/A N/A N/A N/A SHEAR (KT) 9 11 16 18 22 22 25 30 29 30 35 31 23 N/A N/A N/A N/A SHEAR ADJ (KT) 1 3 0 1 1 4 2 -2 -1 -1 -2 0 -2 N/A N/A N/A N/A SHEAR DIR 272 250 243 237 238 262 282 296 279 269 273 293 301 N/A N/A N/A N/A SST (C) 24.3 23.9 24.3 24.0 24.0 24.4 24.5 25.1 25.6 25.6 25.8 26.1 26.1 N/A N/A N/A N/A POT. INT. (KT) 106 102 106 103 104 108 109 115 119 119 121 124 124 N/A N/A N/A N/A 200 MB T (C) -52.3 -52.4 -52.3 -52.2 -52.4 -52.6 -52.9 -53.3 -53.7 -54.3 -54.2 -54.8 -55.0 N/A N/A N/A N/A 200 MB VXT (C) 0.5 0.5 0.4 0.4 0.3 0.1 0.0 0.0 -0.1 -0.1 -0.1 0.0 -0.3 N/A N/A N/A N/A TH_E DEV (C) 3 2 2 3 3 4 4 4 5 5 6 6 7 N/A N/A N/A N/A 700-500 MB RH 46 44 42 40 38 34 33 33 33 33 30 27 31 N/A N/A N/A N/A MODEL VTX (KT) 17 15 15 14 13 11 9 7 6 5 4 3 3 LOST LOST LOST LOST 850 MB ENV VOR 37 24 27 28 22 14 18 16 22 11 0 -26 -27 N/A N/A N/A N/A 200 MB DIV -3 -7 -17 -22 -23 -15 -25 -6 7 -6 -17 -29 -26 N/A N/A N/A N/A 700-850 TADV 4 6 6 6 2 1 -1 -4 -5 -5 -4 0 2 N/A N/A N/A N/A LAND (KM) 1429 1541 1655 1777 1884 2049 1769 1500 1262 1058 870 718 579 N/A N/A N/A N/A LAT (DEG N) 21.6 21.6 21.6 21.6 21.5 21.3 21.2 21.2 21.2 21.3 21.5 22.0 22.5 N/A N/A N/A N/A LONG(DEG W) 127.4 128.7 129.9 131.2 132.5 135.2 137.9 140.5 142.8 144.8 146.7 148.4 150.2 N/A N/A N/A N/A STM SPEED (KT) 11 12 12 12 13 12 13 12 10 9 8 9 9 N/A N/A N/A N/A HEAT CONTENT 0 0 0 0 0 0 0 0 0 0 0 0 1 N/A N/A N/A N/A FORECAST TRACK FROM OFCI INITIAL HEADING/SPEED (DEG/KT):270/ 10 CX,CY: -9/ 0 T-12 MAX WIND: 40 PRESSURE OF STEERING LEVEL (MB): 676 (MEAN=587) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 13.4 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 18.0 (MEAN=65.0) PRELIM RI PROB (DV .GE. 35 KT IN 36 HR): 0.2 INDIVIDUAL CONTRIBUTIONS TO INTENSITY CHANGE 6 12 18 24 36 48 60 72 84 96 108 120 132 144 156 168 ------------------------------------------------------------------------------ SAMPLE MEAN CHANGE 0. 0. 1. 1. 1. 2. 1. 1. 0. -0. -1. -2. -2. -3. -4. -4. SST POTENTIAL 0. 0. 0. 0. 1. 4. 6. 8. 10. 11. 11. 10. 8. 6. 6. 5. VERTICAL SHEAR MAG 1. 1. 2. 3. 3. 0. -4. -11. -17. -22. -25. -26. -27. -28. -32. -34. VERTICAL SHEAR ADJ -0. -0. -0. -0. -1. -1. -1. -0. -0. -0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR DIR 0. 0. 0. 0. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. -0. -0. PERSISTENCE -1. -2. -2. -3. -2. -2. -2. -1. -1. -1. -1. -1. -1. -1. -1. -1. 200/250 MB TEMP. -0. -0. -0. -0. 0. 1. 2. 2. 2. 2. 1. 0. -1. -2. -4. -4. THETA_E EXCESS -0. -1. -2. -2. -3. -4. -5. -5. -5. -5. -5. -4. -4. -5. -5. -6. 700-500 MB RH -0. -0. -0. -1. -2. -2. -2. -2. -3. -3. -3. -4. -4. -5. -7. -10. MODEL VTX TENDENCY -0. -1. -2. -3. -4. -8. -11. -14. -16. -17. -18. -17. -15. -14. -13. -11. 850 MB ENV VORTICITY 0. 0. 0. 0. -0. 0. 0. 0. 0. 0. 0. 1. 1. 1. 1. 1. 200 MB DIVERGENCE -0. -0. -1. -1. -1. -2. -4. -5. -5. -6. -5. -4. -3. -1. 0. 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. 1. 1. 1. 1. 1. 1. 1. 1. 0. 0. 0. -0. STEERING LEVEL PRES 0. 0. 1. 1. 1. 1. 2. 2. 2. 2. 2. 2. 2. 1. 1. 0. DAYS FROM CLIM. PEAK -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. -0. -1. -1. -1. -1. GOES PREDICTORS -1. -1. -1. -2. -3. -4. -6. -7. -8. -9. -11. -11. -11. -10. -9. -8. OCEAN HEAT CONTENT -0. -0. -0. -0. -0. -1. -2. -1. -1. -0. 0. 1. 2. 3. 4. 6. RI POTENTIAL -0. -1. -2. -3. -4. -4. -3. -1. 1. 2. 4. 4. 4. 4. 4. 4. ------------------------------------------------------------------------------ TOTAL CHANGE -3. -5. -7. -9. -13. -20. -26. -33. -40. -46. -50. -51. -53. -55. -58. -60. CURRENT MAX WIND (KT): 35. LAT, LON: 21.6 127.4 ** 2022 E. PACIFIC RI INDEX EP172020 LOWELL 09/25/20 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 POT = MPI-VMAX (KT) : 69.4 30.0 to 135.0 0.37 999.0 12 HR PERSISTENCE (KT) : -5.0 -20.0 to 40.0 0.25 999.0 850-200 MB SHEAR (KT) : 15.2 17.2 to 1.6 0.13 999.0 D200 (10**7s-1) : -14.4 -30.0 to 145.0 0.09 999.0 BL DRY-AIR FLUX (W/M2) : 305.4 742.0 to -74.0 0.54 999.0 MAXIMUM WIND (KT) : 35.0 25.0 to 120.0 0.31 999.0 STD DEV OF IR BR TEMP : 13.4 34.4 to 2.3 0.65 999.0 HEAT CONTENT (KJ/CM2) : 0.0 3.0 to 94.0 0.00 0.0 %area of TPW <45 mm upshear : 27.1 56.6 to 0.0 0.52 999.0 2nd PC OF IR BR TEMP : 0.8 2.0 to -2.0 0.30 999.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 0% is 0.0 times climatological mean ( 6.3%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 8% is 0.7 times climatological mean (12.5%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 8.6%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 6.2%) SHIPS Prob RI for 40kt/ 24hr RI threshold= 0% is 0.0 times climatological mean ( 4.2%) SHIPS Prob RI for 45kt/ 36hr RI threshold= 0% is 0.0 times climatological mean ( 6.7%) SHIPS Prob RI for 55kt/ 48hr RI threshold= 0% is 0.0 times climatological mean ( 5.9%) SHIPS Prob RI for 65kt/ 72hr RI threshold= 0% is 0.0 times climatological mean ( 4.7%) 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: 0.0% 8.4% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Logistic: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Bayesian: 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 0.0% 2.8% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% ## ANNULAR HURRICANE INDEX (AHI) EP172020 LOWELL 09/25/20 06 UTC ## ## STORM NOT ANNULAR, SCREENING STEP FAILED, NPASS=5 NFAIL=2 ## ## AHI= 0 (AHI OF 100 IS BEST FIT TO ANN. STRUC., 1 IS MARGINAL, 0 IS NOT ANNULAR) ##