Tropical Depression 20E
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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
20231123 140402 SSMISF17 10.9 -121.3 N/A N/A N/A N/A N/A 30.0 11.9 -121.1 Analysis Plot
20231123 180841 GMI 12.2 -121.7 246 3% 2.63 -2.63 N/A 30.0 12.0 -121.3 Analysis Plot
20231123 235957 SSMISF18 12.2 -122.8 179 N/A 0.58 -0.58 N/A 30.0 12.1 -122.2 Analysis Plot
20231124 015254 SSMISF16 12.0 -122.8 N/A N/A N/A N/A N/A 30.0 12.2 -122.3 Analysis Plot
20231124 025439 SSMISF17 12.8 -122.3 N/A N/A N/A N/A N/A 30.0 12.7 -122.5 Analysis Plot
20231124 101928 AMSR2 13.1 -122.5 N/A N/A N/A N/A N/A 30.0 13.2 -122.9 Analysis Plot
20231124 123703 SSMISF18 12.3 -122.1 23 N/A 5.11 -5.11 N/A 30.0 13.4 -123.0 Analysis Plot
20231124 143044 SSMISF16 13.2 -122.5 N/A N/A N/A N/A N/A 30.0 13.5 -123.0 Analysis Plot
20231124 172635 GMI 13.4 -122.7 N/A N/A N/A N/A N/A 30.0 13.6 -123.1 Analysis Plot
20231124 211008 AMSR2 13.5 -122.8 68 11% 2.73 -2.73 N/A 30.0 13.6 -122.8 Analysis Plot
20231124 234716 SSMISF18 13.7 -122.6 N/A N/A N/A N/A N/A 30.0 13.7 -122.9 Analysis Plot
20231124 234718 SSMISF18 13.7 -122.4 212 N/A 0.67 -0.67 N/A 35.0 13.8 -123.0 Analysis Plot
20231125 013950 SSMISF16 13.9 -123.0 N/A N/A N/A N/A N/A 35.0 13.9 -123.0 Analysis Plot
20231125 024025 SSMISF17 13.7 -123.0 157 15% 0.20 -0.20 N/A 35.0 13.8 -122.6 Analysis Plot
20231125 045937 GMI 14.2 -122.9 34 21% 2.97 -2.97 N/A 35.0 13.9 -122.6 Analysis Plot
20231125 092420 AMSR2 14.1 -122.8 N/A N/A N/A N/A N/A 35.0 14.8 -123.0 Analysis Plot
20231125 122257 SSMISF18 14.8 -123.1 N/A N/A N/A N/A N/A 35.0 14.9 -123.0 Analysis Plot
20231125 141602 SSMISF16 15.2 -123.0 34 N/A 0.77 -0.77 N/A 35.0 15.1 -123.3 Analysis Plot
20231125 215249 AMSR2 14.6 -122.6 N/A N/A N/A N/A N/A 35.0 15.4 -122.8 Analysis Plot
20231125 233452 SSMISF18 14.1 -121.2 N/A N/A N/A N/A N/A 35.0 15.4 -122.8 Analysis Plot
20231126 012726 SSMISF16 15.1 -122.3 46 14% 0.31 -0.31 N/A 40.0 15.4 -122.8 Analysis Plot
20231126 022627 SSMISF17 14.6 -122.5 212 6% 5.36 -5.36 N/A 40.0 14.8 -122.7 Analysis Plot
20231126 041751 GMI 14.7 -122.6 N/A N/A N/A N/A N/A 40.0 14.8 -122.7 Analysis Plot
20231126 100558 AMSR2 14.5 -123.6 79 N/A 1.16 -1.16 N/A 35.0 14.4 -123.7 Analysis Plot
20231126 120957 SSMISF18 14.4 -123.6 123 N/A 3.60 -3.60 N/A 30.0 14.4 -123.8 Analysis Plot
20231126 140252 SSMISF16 14.4 -123.6 90 N/A 3.58 -3.58 N/A 30.0 14.4 -123.9 Analysis Plot
20231126 150231 SSMISF17 14.3 -123.6 90 N/A 2.62 -2.62 N/A 30.0 14.4 -124.0 Analysis Plot
20231126 173849 GMI 14.7 -123.8 N/A N/A N/A N/A N/A 30.0 14.4 -124.1 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. |
