Tropical Depression 01E

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                 
     20260603 022139  SSMISF17   10.2 -127.1   N/A   N/A     N/A     N/A      N/A   25.0   9.7 -126.9 Analysis Plot     
     20260603 030629       GMI    9.9 -126.8   N/A   N/A     N/A     N/A      N/A   25.0   9.7 -126.8 Analysis Plot     
     20260603 033146  SSMISF16   10.3 -127.3   N/A   N/A     N/A     N/A      N/A   25.0   9.8 -126.9 Analysis Plot     
     20260603 123541  SSMISF18   10.5 -127.9   112   26%    1.18   -1.18      N/A   35.0  10.5 -127.9 Analysis Plot     
     20260603 214516     AMSR2   11.5 -128.2   N/A   N/A     N/A     N/A      N/A   35.0  11.0 -129.2 Analysis Plot     
     20260604 020822  SSMISF17   10.4 -129.0   N/A   N/A     N/A     N/A      N/A   35.0  11.3 -129.5 Analysis Plot     
     20260604 100030     AMSR2   12.3 -130.0    46   26%    2.66   -2.66      N/A   35.0  12.5 -130.2 Analysis Plot     
     20260604 154248       GMI   12.4 -130.6    79    7%    1.40   -1.40      N/A   35.0  12.6 -130.6 Analysis Plot     
     20260604 222837     AMSR2   13.1 -131.5   N/A   N/A     N/A     N/A      N/A   40.0  12.8 -131.4 Analysis Plot     
     20260605 104245     AMSR2   13.5 -133.1   101   22%    0.28   -0.28      N/A   40.0  13.4 -133.1 Analysis Plot     
     20260606 023159       GMI   12.8 -134.1   N/A   N/A     N/A     N/A      N/A   35.0  12.9 -134.5 Analysis Plot     
     20260606 221605     AMSR2   12.2 -134.7   N/A   N/A     N/A     N/A      N/A   30.0  12.2 -134.8 Analysis Plot     
     20260607 103108     AMSR2   11.7 -135.1   N/A   N/A     N/A     N/A      N/A   30.0  11.5 -135.3 Analysis Plot     
     20260607 150901       GMI   11.5 -135.4   N/A   N/A     N/A     N/A      N/A   30.0  11.5 -135.4 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.