Tropical Storm 02L

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                 
     20260719 184358     AMSR2   28.0  -85.3   179    4%    6.42   -6.42      N/A   25.0  28.1  -85.3 Analysis Plot     
     20260719 211645  SSMISF18   27.2  -85.5   101    4%    1.49   -1.49      N/A   25.0  27.5  -85.0 Analysis Plot     
     20260719 233622  SSMISF17   27.4  -85.1    68   N/A    0.41   -0.41      N/A   25.0  27.5  -85.0 Analysis Plot     
     20260720 094513  SSMISF18   29.5  -86.2   N/A   N/A     N/A     N/A      N/A   30.0  28.6  -85.5 Analysis Plot     
     20260720 192754     AMSR2   28.8  -85.9   N/A   N/A     N/A     N/A      N/A   30.0  28.6  -85.8 Analysis Plot     
     20260720 210400  SSMISF18   28.3  -87.6   N/A   N/A     N/A     N/A      N/A   30.0  28.7  -85.8 Analysis Plot     
     20260721 000956       GMI   28.7  -84.5   N/A   N/A     N/A     N/A      N/A   30.0  28.7  -85.9 Analysis Plot     
     20260721 095825       GMI   28.8  -86.5   179   10%    0.12   -0.12      N/A   45.0  28.8  -86.5 Analysis Plot     
     20260721 132405  SSMISF16   28.9  -86.9   135   10%    0.68   -0.68      N/A   50.0  29.3  -86.3 Analysis Plot     
     20260721 183257     AMSR2   29.6  -86.7   N/A   N/A     N/A     N/A      N/A   50.0  29.7  -86.6 Analysis Plot     
     20260721 232636       GMI   29.6  -87.1   N/A   N/A     N/A     N/A      N/A   50.0  29.5  -87.5 Analysis Plot     
     20260722 004304  SSMISF16   29.6  -89.0   N/A   N/A     N/A     N/A      N/A   50.0  29.4  -87.7 Analysis Plot     
     20260722 091532       GMI   29.5  -88.4   N/A   N/A     N/A     N/A      N/A   45.0  29.4  -88.4 Analysis Plot     
     20260722 105658  SSMISF18   31.0  -89.6   N/A   N/A     N/A     N/A      N/A   45.0  29.4  -88.8 Analysis Plot     
     20260722 113623  SSMISF17   29.6  -88.8   101   N/A    1.66   -1.66      N/A   45.0  29.4  -88.8 Analysis Plot     
     20260722 191506     AMSR2   30.7  -89.9   N/A   N/A     N/A     N/A      N/A   40.0  29.9  -89.3 Analysis Plot     
     20260723 104224  SSMISF18   30.7  -93.6   N/A   N/A     N/A     N/A      N/A   40.0  29.1  -92.8 Analysis Plot     
     20260723 130254  SSMISF17   30.8  -94.6   N/A   N/A     N/A     N/A      N/A   40.0  29.2  -93.3 Analysis Plot     
     20260723 195850     AMSR2   30.0  -94.9   N/A   N/A     N/A     N/A      N/A   35.0  29.8  -94.8 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.