Tropical Storm 07E

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                 
     20230813 005943  SSMISF16   15.1 -114.3    57   10%    0.24   -0.24      N/A   30.0  15.2 -113.8 Analysis Plot     
     20230813 101702       GMI   15.4 -115.3    23   74%   12.11  -12.11      N/A   45.0  15.1 -115.3 Analysis Plot     
     20230813 114223  SSMISF18   15.2 -115.8    34   97%   19.22  -34.22      N/A   50.0  15.2 -115.7 Analysis Plot     
     20230813 133519  SSMISF16   15.2 -115.6    34   54%    9.97   -9.97      N/A   50.0  15.4 -115.9 Analysis Plot     
     20230813 210203     AMSR2   15.4 -116.4    23   39%   18.21   18.21      N/A   65.0  15.5 -116.6 Analysis Plot     
     20230813 233215       GMI   15.4 -116.7    23  100%   43.81   58.81  >65 kts   65.0  15.5 -116.8 Analysis Plot     
     20230814 004718  SSMISF16   15.6 -117.0    23  100%   41.69   56.69  >65 kts   85.0  15.6 -117.0 Analysis Plot     
     20230814 023318  SSMISF17   15.6 -117.2   N/A   N/A     N/A     N/A      N/A   85.0  15.6 -117.2 Analysis Plot     
     20230814 023332  SSMISF17   15.6 -116.9   N/A   N/A     N/A     N/A      N/A   85.0  15.6 -117.3 Analysis Plot     
     20230814 091524     AMSR2   15.7 -117.8    12  100%   54.01   69.01  >85 kts  105.0  15.7 -117.9 Analysis Plot     
     20230814 113008  SSMISF18   15.7 -118.3    12  100%   35.78   50.78  >65 kts  115.0  15.7 -118.1 Analysis Plot     
     20230814 214554     AMSR2   16.1 -119.1    12  100%   22.97   37.97  >65 kts  115.0  16.0 -119.2 Analysis Plot     
     20230815 021855  SSMISF17   16.5 -119.8   N/A   N/A     N/A     N/A      N/A  110.0  16.2 -119.7 Analysis Plot     
     20230815 021900  SSMISF17   16.7 -119.8   112   97%   17.93   32.93  >65 kts  110.0  16.6 -119.9 Analysis Plot     
     20230815 100411       GMI   16.8 -120.9   112  100%   22.78   37.78  >65 kts   95.0  16.9 -120.9 Analysis Plot     
     20230815 145325  SSMISF17   16.8 -121.7    34   56%   22.82   22.82  >65 kts   95.0  17.1 -122.2 Analysis Plot     
     20230815 232015       GMI   17.2 -123.5    34   31%    2.32    2.32      N/A   95.0  17.4 -123.3 Analysis Plot     
     20230816 000922  SSMISF18   17.4 -123.8    34   N/A    0.03    0.03      N/A   95.0  17.4 -123.4 Analysis Plot     
     20230816 020310  SSMISF16   17.6 -123.5   N/A   N/A     N/A     N/A      N/A   85.0  17.4 -123.8 Analysis Plot     
     20230816 020619  SSMISF17   17.6 -123.8   146   25%    1.87    1.87      N/A   85.0  17.3 -124.3 Analysis Plot     
     20230816 124344  SSMISF18   16.9 -126.4   157    1%    2.85    2.85      N/A   55.0  17.3 -126.8 Analysis Plot     
     20230816 144025  SSMISF17   16.9 -126.8   157   N/A    1.41    1.41      N/A   55.0  17.0 -127.1 Analysis Plot     
     20230816 213353     AMSR2   16.8 -128.2   N/A   N/A     N/A     N/A      N/A   45.0  16.8 -128.1 Analysis Plot     
     20230816 235651  SSMISF18   16.8 -128.7   290    1%    1.29   -1.29      N/A   40.0  16.8 -128.7 Analysis Plot     
     20230817 014901  SSMISF16   16.7 -128.9   257    3%    2.99   -2.99      N/A   40.0  16.7 -128.9 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.