* GFS version * * ATLANTIC 2023 SHIPS INTENSITY FORECAST * * IR SAT DATA AVAILABLE, OHC AVAILABLE * * OPHELIA AL162023 09/23/23 18 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 37 34 31 29 27 21 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LAND 40 34 31 29 29 32 26 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A V (KT) LGEM 40 34 30 29 29 32 31 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Storm Type EXTP EXTP EXTP EXTP 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) 30 36 37 27 32 39 37 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR ADJ (KT) -2 -7 -6 -1 -1 -4 3 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SHEAR DIR 207 216 238 241 236 244 256 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A SST (C) 27.3 25.8 24.7 23.5 23.2 21.1 22.1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A POT. INT. (KT) 127 111 102 94 92 82 86 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB T (C) -54.9 -55.1 -55.2 -55.4 -55.6 -55.4 -55.4 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB VXT (C) 0.8 0.4 0.3 0.4 0.3 0.0 0.0 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A TH_E DEV (C) 1 0 0 0 0 0 1 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-500 MB RH 50 50 49 53 55 50 41 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A MODEL VTX (KT) 26 24 20 16 14 11 10 LOST LOST LOST LOST LOST LOST LOST LOST LOST LOST 850 MB ENV VOR 98 83 51 58 54 57 53 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 200 MB DIV 65 39 -37 -16 34 13 -5 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 700-850 TADV 15 19 24 14 13 -3 -20 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAND (KM) -88 -109 -122 -111 -78 16 145 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LAT (DEG N) 36.3 37.1 37.9 38.5 39.1 39.6 39.6 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A LONG(DEG W) 77.3 77.2 77.1 76.5 75.9 74.1 71.9 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A STM SPEED (KT) 9 8 8 8 7 8 8 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A HEAT CONTENT 2 0 0 0 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): 0/ 11 CX,CY: 0/ 11 T-12 MAX WIND: 60 PRESSURE OF STEERING LEVEL (MB): 665 (MEAN=620) GOES IR BRIGHTNESS TEMP. STD DEV. 50-200 KM RAD: 14.3 (MEAN=14.5) % GOES IR PIXELS WITH T < -20 C 50-200 KM RAD: 42.0 (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. 7. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. SST POTENTIAL 0. -1. -1. -2. -4. -6. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR MAG 1. 2. 3. 4. 5. 5. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR ADJ 0. 1. 1. 1. 2. 3. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. VERTICAL SHEAR DIR 0. 1. 1. 1. 2. 3. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. PERSISTENCE -4. -6. -7. -7. -4. -4. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 200/250 MB TEMP. 0. 1. 1. 1. 2. 2. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. THETA_E EXCESS -0. -1. -2. -2. -4. -5. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 700-500 MB RH 0. 0. 0. 0. 0. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. MODEL VTX TENDENCY -1. -3. -7. -9. -14. -21. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 850 MB ENV VORTICITY 0. 0. 1. 1. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 200 MB DIVERGENCE 0. -0. -0. -0. -1. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 850-700 T ADVEC -0. 0. 0. 1. 1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. ZONAL STORM MOTION 0. -0. -0. -0. -0. -1. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 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. 0. 0. GOES PREDICTORS -0. -0. -0. -0. -1. -1. 0. 0. 0. 0. 0. 0. 0. 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. -3. -4. -4. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. -------------------------------------------------------------------------------------------- TOTAL CHANGE -3. -6. -9. -11. -13. -19. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. CURRENT MAX WIND (KT): 40. LAT, LON: 36.3 77.3 ** 2023 ATLANTIC RI INDEX AL162023 OPHELIA 09/23/23 18 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) : -20.0 -49.5 to 33.0 0.36 1.0 MULTI-LAYER SHEAR (KT) : 37.3 45.1 to 6.7 0.20 0.3 HEAT CONTENT (KJ/CM2) : 0.4 0.0 to 161.7 0.00 0.0 STD DEV OF IR BR TEMP : 14.3 36.6 to 2.8 0.66 0.8 MAXIMUM WIND (KT) : 40.0 22.5 to 126.5 0.47 0.3 2nd PC OF IR BR TEMP : -1.0 2.9 to -3.0 0.66 0.4 POT = MPI-VMAX (KT) : 48.4 27.0 to 144.1 0.18 0.1 D200 (10**7s-1) : 17.0 -30.8 to 188.1 0.22 0.2 BL DRY-AIR FLUX (W/M2) : 162.8 895.4 to -71.5 0.76 0.4 %area of TPW <45 mm upshear : 81.7 109.3 to 0.0 0.25 0.0 SHIPS Prob RI for 20kt/ 12hr RI threshold= 1% is 0.2 times climatological mean ( 4.9%) SHIPS Prob RI for 25kt/ 24hr RI threshold= 5% is 0.5 times climatological mean (10.9%) SHIPS Prob RI for 30kt/ 24hr RI threshold= 4% is 0.5 times climatological mean ( 6.8%) SHIPS Prob RI for 35kt/ 24hr RI threshold= 2% is 0.6 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: 1.2% 5.2% 3.5% 2.4% 0.0% 0.0% 0.0% 0.0% Logistic: 0.2% 0.2% 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% Bayesian: 0.1% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Consensus: 0.5% 1.8% 1.2% 0.8% 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) AL162023 OPHELIA 09/23/23 18 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 AL162023 OPHELIA 09/23/2023 18 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 34 31 29 29 32 26 DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS 18HR AGO 40 39 36 34 34 37 31 DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS 12HR AGO 40 37 36 34 34 37 31 DIS DIS DIS DIS DIS DIS DIS DIS DIS DIS 6HR AGO 40 34 31 30 30 33 27 DIS DIS 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