Tropical Storm 16L

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                 
     20241019 150633       GMI   21.6  -70.3   246    4%    6.11   -6.11      N/A   35.0  21.3  -70.3 Analysis Plot     
     20241019 183004     AMSR2   21.4  -70.8     5   74%    3.10    3.10      N/A   70.0  21.4  -70.6 Analysis Plot     
     20241019 203339  SSMISF18   21.5  -71.4   N/A   N/A     N/A     N/A      N/A   70.0  21.4  -71.1 Analysis Plot     
     20241019 225408  SSMISF16   21.4  -71.6    12   54%    2.47    2.47      N/A   70.0  21.4  -71.4 Analysis Plot     
     20241019 230808  SSMISF17   21.5  -71.6    12   39%    1.93    1.93      N/A   70.0  21.4  -71.5 Analysis Plot     
     20241020 063909     AMSR2   21.0  -72.9    12   83%    0.78    0.78      N/A   70.0  21.1  -73.1 Analysis Plot     
     20241020 090533  SSMISF18   20.9  -73.3    23  100%   23.76   38.76  >65 kts   70.0  21.0  -73.3 Analysis Plot     
     20241020 113944  SSMISF17   20.6  -73.5    12   67%    6.88    6.88      N/A   70.0  20.9  -73.6 Analysis Plot     
     20241020 202010  SSMISF18   18.9  -73.2   N/A   N/A     N/A     N/A      N/A   70.0  20.5  -74.4 Analysis Plot     
     20241020 202012  SSMISF18   20.5  -74.5    12  100%   29.16   44.16  >65 kts   70.0  20.5  -74.4 Analysis Plot     
     20241020 225310  SSMISF17   20.5  -74.4   N/A   N/A     N/A     N/A      N/A   70.0  20.4  -74.4 Analysis Plot     
     20241021 015144       GMI   20.3  -75.6    46    3%    0.34    0.34      N/A   65.0  20.4  -74.7 Analysis Plot     
     20241021 085227  SSMISF18   20.2  -76.4   N/A   N/A     N/A     N/A      N/A   50.0  20.2  -75.2 Analysis Plot     
     20241021 111257  SSMISF16   20.5  -76.3   N/A   N/A     N/A     N/A      N/A   50.0  20.4  -75.3 Analysis Plot     
     20241021 151520       GMI   20.7  -76.2   N/A   N/A     N/A     N/A      N/A   40.0  20.3  -75.4 Analysis Plot     
     20241021 181652     AMSR2   20.6  -76.0   N/A   N/A     N/A     N/A      N/A   35.0  20.5  -75.4 Analysis Plot     
     20241021 224023  SSMISF17   20.9  -76.7   168   N/A    1.40   -1.40      N/A   35.0  21.1  -76.2 Analysis Plot     
     20241021 224025  SSMISF17   21.1  -77.3   N/A   N/A     N/A     N/A      N/A   35.0  21.3  -76.1 Analysis Plot     
     20241022 010729       GMI   22.2  -74.4   N/A   N/A     N/A     N/A      N/A   35.0  21.4  -76.1 Analysis Plot     
     20241022 083849  SSMISF18   22.9  -74.8   N/A   N/A     N/A     N/A      N/A   35.0  22.8  -74.7 Analysis Plot     
     20241022 111102  SSMISF17   23.0  -74.7   N/A   N/A     N/A     N/A      N/A   35.0  23.1  -74.4 Analysis Plot     
     20241022 143334       GMI   22.1  -72.7    23   N/A    2.65   -2.65      N/A   35.0  23.4  -74.2 Analysis Plot     
     20241022 221536  SSMISF16   24.1  -73.0   257    4%    1.09   -1.09      N/A   35.0  24.1  -73.0 Analysis Plot     
     20241022 222648  SSMISF17   24.3  -72.9   201    3%    2.27   -2.27      N/A   35.0  24.3  -72.8 Analysis Plot

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.