Tropical Storm 08E

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                 
     20240825 213843     AMSR2   15.7 -123.1   N/A   N/A     N/A     N/A      N/A   40.0  15.9 -122.0 Analysis Plot     
     20240826 014852  SSMISF17   16.5 -123.8   N/A   N/A     N/A     N/A      N/A   40.0  16.2 -123.3 Analysis Plot     
     20240826 103541       GMI   15.9 -124.1    23   28%    6.65   -6.65      N/A   40.0  16.4 -124.2 Analysis Plot     
     20240826 142256  SSMISF17   16.3 -125.3   257   25%    2.35   -2.35      N/A   45.0  16.2 -125.0 Analysis Plot     
     20240827 002519  SSMISF18   17.0 -126.4   N/A   N/A     N/A     N/A      N/A   45.0  16.6 -126.3 Analysis Plot     
     20240827 023724  SSMISF16   17.3 -126.4    34   72%   14.84  -14.84      N/A   45.0  16.8 -126.7 Analysis Plot     
     20240827 125944  SSMISF18   17.2 -128.5   123    7%    1.08   -1.08      N/A   40.0  17.3 -128.5 Analysis Plot     
     20240827 151149  SSMISF16   17.5 -129.0   168   12%    3.04   -3.04      N/A   40.0  17.6 -129.0 Analysis Plot     
     20240827 212302       GMI   17.4 -129.5   N/A   N/A     N/A     N/A      N/A   45.0  17.8 -129.9 Analysis Plot     
     20240828 001211  SSMISF18   17.1 -130.7   N/A   N/A     N/A     N/A      N/A   45.0  17.9 -130.4 Analysis Plot     
     20240828 022424  SSMISF16   17.3 -130.8   N/A   N/A     N/A     N/A      N/A   45.0  18.0 -130.8 Analysis Plot     
     20240828 030012  SSMISF17   18.5 -131.7   N/A   N/A     N/A     N/A      N/A   45.0  18.2 -131.0 Analysis Plot     
     20240828 124547  SSMISF18   17.6 -132.6   N/A   N/A     N/A     N/A      N/A   45.0  18.5 -132.8 Analysis Plot     
     20240828 145811  SSMISF16   18.5 -133.5   N/A   N/A     N/A     N/A      N/A   45.0  18.3 -133.1 Analysis Plot     
     20240828 153539  SSMISF17   18.4 -133.6   N/A   N/A     N/A     N/A      N/A   45.0  18.3 -133.2 Analysis Plot     
     20240828 221005     AMSR2   17.2 -133.5     5   N/A    2.83   -2.83      N/A   40.0  17.6 -133.8 Analysis Plot     
     20240829 024803  SSMISF17   17.1 -134.2   146   N/A    2.43   -2.43      N/A   35.0  17.2 -134.2 Analysis Plot     
     20240829 024804  SSMISF17   17.2 -134.5   101   N/A    1.78   -1.78      N/A   35.0  17.2 -134.5 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.