Tropical Storm 19W


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                 
     20240926 180128  SSMISF18   17.5  145.5   N/A   N/A     N/A     N/A      N/A   30.0  17.9  146.3 Analysis Plot     
     20240927 070219       GMI   19.0  144.5   N/A   N/A     N/A     N/A      N/A   35.0  18.8  144.5 Analysis Plot     
     20240927 075538  SSMISF17   18.6  144.3   223    8%    1.49   -1.49      N/A   35.0  18.6  144.3 Analysis Plot     
     20240927 162657     AMSR2   19.5  144.7   N/A   N/A     N/A     N/A      N/A   40.0  19.1  144.2 Analysis Plot     
     20240927 202752  SSMISF17   19.7  143.9   N/A   N/A     N/A     N/A      N/A   35.0  19.9  143.8 Analysis Plot     
     20240928 032155     AMSR2   20.5  143.1     5   N/A    2.81   -2.81      N/A   35.0  20.6  142.6 Analysis Plot     
     20240928 032201     AMSR2   20.5  143.1     5   N/A    2.98   -2.98      N/A   35.0  20.7  142.4 Analysis Plot     
     20240928 064302  SSMISF18   21.0  142.3   N/A   N/A     N/A     N/A      N/A   30.0  21.0  142.1 Analysis Plot     
     20240928 174818       GMI   22.0  141.9   N/A   N/A     N/A     N/A      N/A   30.0  22.0  141.9 Analysis Plot     
     20240928 191447  SSMISF18   22.4  141.7   135   N/A    3.99   -3.99      N/A   30.0  22.4  141.7 Analysis Plot     
     20240929 040429     AMSR2   23.4  141.2   N/A   N/A     N/A     N/A      N/A   35.0  23.3  141.2 Analysis Plot     
     20240929 071344       GMI   23.9  140.7   N/A   N/A     N/A     N/A      N/A   35.0  23.5  141.1 Analysis Plot     
     20240929 071355       GMI   24.2  141.2    79   11%    5.28   -5.28      N/A   35.0  24.1  141.1 Analysis Plot     
     20240929 084651  SSMISF16   23.8  141.9   N/A   N/A     N/A     N/A      N/A   35.0  24.7  140.9 Analysis Plot     
     20240929 170510       GMI   24.9  141.3   101   46%    3.67   -3.67      N/A   35.0  25.5  140.8 Analysis Plot     
     20240929 185907  SSMISF18   24.7  141.0   N/A   N/A     N/A     N/A      N/A   40.0  26.0  140.7 Analysis Plot     
     20240929 211616  SSMISF16   26.0  141.3    46   11%    0.74   -0.74      N/A   40.0  26.1  140.7 Analysis Plot     
     20240929 213951  SSMISF17   26.3  140.8   N/A   N/A     N/A     N/A      N/A   40.0  26.2  140.7 Analysis Plot     
     20240930 061631  SSMISF18   27.0  140.3   179    8%    0.58   -0.58      N/A   35.0  27.3  140.4 Analysis Plot     
     20240930 085731  SSMISF17   28.5  141.6    79   51%    0.57   -0.57      N/A   40.0  29.2  140.8 Analysis Plot     
     20240930 184358  SSMISF18   31.1  141.2    68   35%    6.39    6.39      N/A   55.0  31.4  141.5 Analysis Plot     
     20240930 212320  SSMISF17   31.8  141.7    23   N/A   10.70   10.70      N/A   55.0  32.2  141.4 Analysis Plot     
     20241001 060458  SSMISF18   34.9  142.1    46   26%   11.64   11.64      N/A   70.0  35.1  142.8 Analysis Plot     
     20241001 082254  SSMISF16   35.7  142.8   N/A   N/A     N/A     N/A      N/A   65.0  36.5  143.5 Analysis Plot     
     20241001 084553  SSMISF17   35.9  143.1   N/A   N/A     N/A     N/A      N/A   65.0  36.6  143.6 Analysis Plot     
     20241001 153722       GMI   38.4  144.7    23  100%   24.97  -39.97      N/A   50.0  38.6  145.1 Analysis Plot     
     20241001 182753  SSMISF18   39.3  145.8    68   39%    0.38    0.38      N/A   60.0  39.8  146.1 Analysis Plot     
     20241001 204457  SSMISF16   40.2  146.9   146   32%    1.89    1.89      N/A   60.0  40.8  147.4 Analysis Plot     
     20241001 210641  SSMISF17   40.7  147.3    79   43%    1.81    1.81      N/A   60.0  41.1  147.7 Analysis Plot     
     20241002 030212     AMSR2   43.4  151.1    68   12%    3.19    3.19      N/A   60.0  44.3  152.2 Analysis Plot     
     20241002 064812       GMI   45.2  152.7   N/A   N/A     N/A     N/A      N/A   60.0  45.0  153.2 Analysis Plot     
     20241002 145756     AMSR2   50.4  161.0   N/A   N/A     N/A     N/A      N/A   45.0  51.4  161.8 Analysis Plot     
     20241002 181024  SSMISF18   51.8  164.0    68   N/A    1.11   -1.11      N/A   45.0  51.6  162.2 Analysis Plot     
     20241002 204939  SSMISF17   52.9  164.3   235   N/A    2.02   -2.02      N/A   45.0  52.5  164.0 Analysis Plot     
     20241003 040047  SSMISF18   55.0  166.3   N/A   N/A     N/A     N/A      N/A   45.0  53.7  168.8 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.