Tropical Depression 07P

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                 
     20240123 031900     AMSR2  -18.3  153.7   N/A   N/A     N/A     N/A      N/A   35.0 -17.4  153.3 Analysis Plot     
     20240123 180312  SSMISF18  -17.6  151.8   N/A   N/A     N/A     N/A      N/A   35.0 -17.5  152.8 Analysis Plot     
     20240124 050147       GMI  -16.8  150.9   N/A   N/A     N/A     N/A      N/A   40.0 -17.5  152.3 Analysis Plot     
     20240124 182528       GMI  -18.2  149.4   N/A   N/A     N/A     N/A      N/A   45.0 -17.9  149.6 Analysis Plot     
     20240124 201635  SSMISF17  -18.1  149.5   112    6%    1.39   -1.39      N/A   50.0 -18.0  149.4 Analysis Plot     
     20240125 062237  SSMISF18  -18.5  147.7    12   14%    2.15    2.15      N/A   65.0 -18.9  147.7 Analysis Plot     
     20240125 085007  SSMISF17  -18.5  146.8   157   13%   10.10   10.10      N/A   60.0 -19.0  147.4 Analysis Plot     
     20240125 173703  SSMISF18  -20.2  144.5   N/A   N/A     N/A     N/A      N/A   50.0 -20.0  145.0 Analysis Plot     
     20240125 193117  SSMISF16  -20.5  144.3   N/A   N/A     N/A     N/A      N/A   40.0 -20.2  144.8 Analysis Plot     
     20240125 200415  SSMISF17  -20.6  144.1   N/A   N/A     N/A     N/A      N/A   40.0 -20.3  144.6 Analysis Plot     
     20240126 060926  SSMISF18  -21.8  142.9   N/A   N/A     N/A     N/A      N/A   30.0 -21.3  143.3 Analysis Plot     
     20240126 080337  SSMISF16  -22.0  142.5   N/A   N/A     N/A     N/A      N/A   30.0 -21.5  143.1 Analysis Plot     
     20240126 083632  SSMISF17  -21.7  141.2   N/A   N/A     N/A     N/A      N/A   30.0 -21.6  142.7 Analysis Plot     
     20240201 154412     AMSR2  -17.5  139.4   N/A   N/A     N/A     N/A      N/A   40.0 -17.4  139.5 Analysis Plot     
     20240202 033108       GMI  -17.7  138.7    12   10%    5.28   -5.28      N/A   45.0 -17.4  139.1 Analysis Plot     
     20240202 074705  SSMISF16  -18.0  138.2   N/A   N/A     N/A     N/A      N/A   35.0 -18.4  138.5 Analysis Plot     
     20240203 025104       GMI  -20.0  137.7   N/A   N/A     N/A     N/A      N/A   30.0 -20.0  138.1 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.