Tropical Depression 18L
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Passive Microwave (PMW) Intensity Information Advanced Dvorak Technique Version 9.1 |
--Overpass-- --ARCHER-- Ring Ring Eye BT -Forecast-
Date Time Sat Lat Lon Diam Pct TbDiff Score Meaning Vmax Lat Lon
20241104 113335 SSMISF17 14.3 -76.7 N/A N/A N/A N/A N/A 30.0 14.7 -76.9 Analysis Plot
20241104 182752 AMSR2 15.5 -77.1 34 N/A 2.18 -2.18 N/A 40.0 15.8 -77.2 Analysis Plot
20241104 213909 GMI 15.7 -77.0 257 36% 8.20 -8.20 N/A 40.0 15.6 -76.8 Analysis Plot
20241104 223930 SSMISF16 15.7 -77.1 N/A N/A N/A N/A N/A 40.0 15.8 -76.9 Analysis Plot
20241104 224524 SSMISF17 15.9 -77.1 279 29% 0.97 -0.97 N/A 40.0 16.0 -77.1 Analysis Plot
20241105 064036 AMSR2 16.8 -77.6 68 15% 5.10 -5.10 N/A 45.0 17.1 -77.8 Analysis Plot
20241105 085042 SSMISF18 16.9 -78.1 57 4% 4.11 -4.11 N/A 45.0 17.1 -78.1 Analysis Plot
20241105 110120 GMI 17.2 -78.3 34 N/A 0.73 -0.73 N/A 45.0 17.3 -78.2 Analysis Plot
20241105 111909 SSMISF17 17.2 -78.4 34 15% 1.78 -1.78 N/A 45.0 17.5 -78.4 Analysis Plot
20241106 072233 AMSR2 20.4 -81.0 12 100% 38.76 53.76 >65 kts 75.0 20.6 -81.3 Analysis Plot
20241106 181849 AMSR2 21.9 -82.5 N/A N/A N/A N/A N/A 90.0 22.0 -82.4 Analysis Plot
20241106 213104 SSMISF18 22.9 -82.9 34 43% 17.70 17.70 N/A 100.0 22.8 -82.8 Analysis Plot
20241106 235518 SSMISF16 22.5 -83.1 90 N/A 2.20 2.20 N/A 100.0 23.1 -83.1 Analysis Plot
20241107 000100 SSMISF17 23.3 -82.4 N/A N/A N/A N/A N/A 100.0 23.2 -83.2 Analysis Plot
20241107 111323 GMI 23.6 -85.7 146 N/A 3.71 3.71 N/A 90.0 24.4 -84.9 Analysis Plot
20241107 111327 GMI 24.6 -84.6 N/A N/A N/A N/A N/A 90.0 24.5 -85.0 Analysis Plot
20241107 123028 SSMISF17 24.3 -84.8 23 42% 18.02 18.02 N/A 90.0 24.6 -85.4 Analysis Plot
20241107 210502 GMI 24.8 -86.2 34 100% 26.72 41.72 >65 kts 90.0 24.7 -86.2 Analysis Plot
20241107 211751 SSMISF18 24.7 -86.4 23 100% 27.16 42.16 >65 kts 90.0 24.7 -86.3 Analysis Plot
20241107 234624 SSMISF17 24.7 -86.6 34 100% 30.40 45.40 >65 kts 90.0 24.8 -86.7 Analysis Plot
20241107 234626 SSMISF17 24.7 -86.6 34 100% 30.42 45.42 >65 kts 90.0 24.8 -86.9 Analysis Plot
20241108 071035 AMSR2 24.5 -87.8 34 100% 35.38 50.38 >65 kts 105.0 24.5 -88.0 Analysis Plot
20241108 103051 GMI 24.4 -88.2 23 75% 10.52 10.52 N/A 105.0 24.5 -88.2 Analysis Plot
20241108 121620 SSMISF17 24.3 -88.6 5 N/A 5.44 5.44 N/A 95.0 24.5 -88.6 Analysis Plot
20241108 194525 AMSR2 24.6 -89.3 N/A N/A N/A N/A N/A 90.0 24.6 -89.4 Analysis Plot
20241108 210538 SSMISF18 24.3 -89.5 101 32% 3.48 3.48 N/A 90.0 24.6 -89.8 Analysis Plot
20241108 232851 SSMISF16 24.6 -89.5 146 28% 1.39 1.39 N/A 90.0 24.6 -89.9 Analysis Plot
20241108 233259 SSMISF17 24.4 -89.7 212 17% 3.24 3.24 N/A 90.0 24.6 -90.0 Analysis Plot
20241109 075220 AMSR2 25.3 -90.0 79 85% 16.56 16.56 N/A 55.0 25.0 -90.9 Analysis Plot
20241109 120310 SSMISF17 25.7 -90.3 N/A N/A N/A N/A N/A 50.0 25.1 -91.2 Analysis Plot
20241109 185059 AMSR2 25.2 -93.1 N/A N/A N/A N/A N/A 45.0 25.3 -91.8 Analysis Plot
20241109 211501 GMI 25.5 -91.7 235 3% 1.24 -1.24 N/A 45.0 25.5 -91.7 Analysis Plot
20241110 104216 GMI 26.0 -91.8 N/A N/A N/A N/A N/A 35.0 26.1 -91.8 Analysis Plot
20241110 203243 GMI 26.7 -90.3 N/A N/A N/A N/A N/A 30.0 26.4 -91.6 Analysis Plot
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Legend - Overpass Date/Time are determined from satellite overpass of targeted TC (position determined from Best Track Lat/Lon position). Date is YYYYMMDD and time in HHMMSS (UTC). - Forecast (Best Track) and ARCHER positions (deg) of the TC center at overpass day/time. Positive/Negative: Latitude = North/South Hemisphere; Longitude = Eastern/Western Hemisphere. - BT Vmax is the concurrent ATCF Best Track (BT) wind speed intensity estimate (Vmax) value from either NOAA/National Hurricane Center (NHC) (North Atlantic and Northeast Pacific), NOAA/Central Pacific Hurricane Center (CPHC) (North-central Pacific) or Joint Typhoon Warning Center (JTWC) (Northwest Pacific, Indian Ocean, or Southwest Pacific). - Sat is the satellite descriptor providing the overpass. Currently the satellites used are the DMSP/SSMIS-16/17/18, GPM/GMI, and GCOM/AMSR2. - Ring Diam (km) indicates the estimated surface eyewall diameter if one is analyzed in the PMW imagery. The value listed is the average PMW-estimated inner eyewall edge diameter minus 10 km for eyewall slope. N/A indicates no appreciable eyewall is analyzed. - Ring Pct is the percentage of the analyzed "ring" (eyewall inner boundary) that is 1) colder than the eye Tb (the "hot spot" -- warmest eye pixel) by at least 20K, or 2) that is colder than 232K and colder than the eye Tb by 10K, whichever is greater. Values are red if Ring % ≤65,yellow/brown if Ring % ≤85 and green if Ring % >85. N/A indicates no appreciable eyewall is analyzed. A value over 85% is used in the intensity score by adding 15 points to it. - TbDiff is the difference between the warmest eye pixel and the warmest pixel on the eyewall. This value is used in the Intensity Score. N/A indicates no appreciable eyewall is analyzed. - Eye Score values are based on the strength and organization of the convective/eyewall signatures in the PMW imagery, and based on the ARCHER center location. They normally range from 0 to 100 with empirically-determined thresholds related to intensity (Vmax) in the "Meaning" column (≥20 suggests ≥65kts; ≥60 suggests ≥85kts). Scores are listed as negative, and not used by the ADT, when the NHC, CPHC, or JTWC Best Track Vmax is <55 kts in order to filter out occasional "false eye" cases. A value of -920 is used when the warmest eye pixel is <200K to prevent false positives; -930 means edge of overpass and <85% of eyewall is captured and therefore can't fully be analyzed. |
