Hurricane 12L

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                 
     20240930 053547       GMI   14.5  -34.1   N/A   N/A     N/A     N/A      N/A   30.0  13.9  -33.5 Analysis Plot     
     20240930 180546  SSMISF18   13.9  -35.5    46    8%    6.64   -6.64      N/A   45.0  13.6  -35.4 Analysis Plot     
     20240930 204548  SSMISF17   14.1  -36.2   N/A   N/A     N/A     N/A      N/A   50.0  13.6  -35.7 Analysis Plot     
     20241001 045224       GMI   14.4  -37.1   101   21%    4.79   -4.79      N/A   50.0  14.5  -37.1 Analysis Plot     
     20241001 064142  SSMISF18   14.5  -37.7   190   32%    1.28   -1.28      N/A   50.0  14.7  -37.7 Analysis Plot     
     20241001 085901  SSMISF16   14.6  -37.8   112   N/A    4.01   -4.01      N/A   50.0  15.0  -38.3 Analysis Plot     
     20241001 092142  SSMISF17   14.7  -37.7   112   11%    2.75   -2.75      N/A   50.0  15.0  -38.3 Analysis Plot     
     20241001 181312       GMI   15.8  -39.7    46   49%    3.85    3.85      N/A   60.0  15.6  -39.7 Analysis Plot     
     20241001 203225  SSMISF17   16.2  -40.0   101   31%   13.32   13.32      N/A   65.0  15.8  -40.1 Analysis Plot     
     20241002 062810  SSMISF18   17.2  -41.9   101   35%    8.19    8.19      N/A   70.0  17.2  -41.5 Analysis Plot     
     20241002 090628  SSMISF17   17.5  -42.3    90   50%    7.24    7.24      N/A   70.0  17.6  -42.3 Analysis Plot     
     20241002 160621     AMSR2   18.3  -43.2   101   60%   19.68   19.68      N/A   80.0  18.4  -43.5 Analysis Plot     
     20241003 050053       GMI   19.5  -44.5    46  100%   26.91   41.91  >65 kts  105.0  19.6  -44.7 Analysis Plot     
     20241003 085318  SSMISF17   19.9  -45.3    34   22%   27.59   27.59  >65 kts  105.0  20.1  -45.1 Analysis Plot     
     20241003 165039     AMSR2   20.6  -46.2    34  100%   39.57   54.57  >65 kts  110.0  20.7  -46.3 Analysis Plot     
     20241003 182538       GMI   20.8  -46.4    34  100%   46.20   61.20  >85 kts  110.0  20.8  -46.3 Analysis Plot     
     20241003 190833  SSMISF18   21.0  -46.6    34  100%   53.16   68.16  >85 kts  110.0  20.9  -46.5 Analysis Plot     
     20241003 212646  SSMISF16   21.0  -46.8    23  100%   53.59   68.59  >85 kts  110.0  21.2  -46.8 Analysis Plot     
     20241004 074017  SSMISF18   21.9  -48.0    23  100%   39.57   54.57  >65 kts  125.0  22.3  -48.1 Analysis Plot     
     20241004 095806  SSMISF16   22.1  -48.4    23  100%   26.19   41.19  >65 kts  125.0  22.6  -48.4 Analysis Plot     
     20241004 185529  SSMISF18   23.6  -49.5    23  100%   28.16   43.16  >65 kts  115.0  23.7  -49.3 Analysis Plot     
     20241004 211330  SSMISF16   23.9  -49.6    23  100%   26.56   41.56  >65 kts  115.0  23.8  -49.5 Analysis Plot     
     20241004 213418  SSMISF17   24.0  -49.5    23  100%   27.21   42.21  >65 kts  115.0  23.8  -49.5 Analysis Plot     
     20241005 054308     AMSR2   25.3  -49.5   N/A   N/A     N/A     N/A      N/A  110.0  26.1  -50.0 Analysis Plot     
     20241005 072525  SSMISF18   25.5  -50.4    23  100%   36.35   51.35  >65 kts  110.0  26.2  -50.2 Analysis Plot     
     20241005 100326  SSMISF17   26.1  -50.3    46   56%   20.55   20.55  >65 kts  110.0  26.9  -50.3 Analysis Plot     
     20241005 163953     AMSR2   28.1  -50.3    46   31%    5.77    5.77      N/A  105.0  28.3  -50.2 Analysis Plot     
     20241005 184324  SSMISF18   28.9  -50.6    34   14%   13.76   13.76      N/A  105.0  28.8  -50.2 Analysis Plot     
     20241005 212142  SSMISF17   29.8  -50.2    23   N/A    8.18    8.18      N/A  105.0  29.8  -50.0 Analysis Plot     
     20241006 044517     AMSR2   31.8  -49.0   N/A   N/A     N/A     N/A      N/A   95.0  32.8  -48.6 Analysis Plot     
     20241006 071010  SSMISF18   32.7  -49.1   N/A   N/A     N/A     N/A      N/A   95.0  33.0  -48.6 Analysis Plot     
     20241006 092757  SSMISF16   33.1  -48.8   N/A   N/A     N/A     N/A      N/A   95.0  34.1  -48.6 Analysis Plot     
     20241006 094717  SSMISF17   32.9  -48.4   N/A   N/A     N/A     N/A      N/A   95.0  34.3  -48.5 Analysis Plot     
     20241006 154740     AMSR2   35.6  -46.9   N/A   N/A     N/A     N/A      N/A   85.0  36.0  -47.3 Analysis Plot     
     20241006 183140  SSMISF18   36.2  -46.2   179    4%    2.89    2.89      N/A   85.0  36.6  -46.7 Analysis Plot     
     20241006 183146  SSMISF18   36.2  -46.0   N/A   N/A     N/A     N/A      N/A   80.0  37.0  -46.3 Analysis Plot     
     20241006 205002  SSMISF16   36.6  -46.2   N/A   N/A     N/A     N/A      N/A   80.0  37.0  -46.2 Analysis Plot     
     20241006 210954  SSMISF17   36.9  -45.3   212   N/A    3.01    3.01      N/A   80.0  37.1  -46.0 Analysis Plot     
     20241007 065405  SSMISF18   39.0  -41.0   N/A   N/A     N/A     N/A      N/A   65.0  40.0  -41.4 Analysis Plot     
     20241007 093118  SSMISF17   39.7  -39.3   N/A   N/A     N/A     N/A      N/A   65.0  40.7  -40.1 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.