Tropical Storm 02E

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                 
     20240724 232700  SSMISF18   17.3 -112.6   N/A   N/A     N/A     N/A      N/A   35.0  17.3 -112.6 Analysis Plot     
     20240725 013446  SSMISF16   17.1 -112.8   157   11%    1.65   -1.65      N/A   35.0  17.4 -113.0 Analysis Plot     
     20240725 052629       GMI   17.6 -113.7   N/A   N/A     N/A     N/A      N/A   35.0  17.6 -113.7 Analysis Plot     
     20240725 095240     AMSR2   18.0 -114.8   N/A   N/A     N/A     N/A      N/A   45.0  18.0 -115.0 Analysis Plot     
     20240725 120055  SSMISF18   18.5 -115.2   146   12%    4.22   -4.22      N/A   50.0  18.0 -115.3 Analysis Plot     
     20240725 140843  SSMISF16   18.7 -115.4   168   10%    3.74   -3.74      N/A   50.0  18.3 -115.8 Analysis Plot     
     20240725 185031       GMI   18.8 -116.5    23   N/A    1.64   -1.64      N/A   50.0  18.4 -116.3 Analysis Plot     
     20240725 204541     AMSR2   18.2 -117.1   N/A   N/A     N/A     N/A      N/A   50.0  18.4 -117.2 Analysis Plot     
     20240725 231400  SSMISF18   18.2 -118.0   N/A   N/A     N/A     N/A      N/A   50.0  18.5 -117.3 Analysis Plot     
     20240725 231417  SSMISF18   18.4 -117.7   135   N/A    5.37   -5.37      N/A   45.0  18.5 -117.7 Analysis Plot     
     20240726 012207  SSMISF16   18.6 -117.8    57   N/A    2.99   -2.99      N/A   45.0  18.5 -117.8 Analysis Plot     
     20240726 021438  SSMISF17   18.9 -117.9    79   N/A    4.26   -4.26      N/A   45.0  18.5 -117.9 Analysis Plot     
     20240726 114726  SSMISF18   19.3 -119.6   135   N/A    3.85   -3.85      N/A   35.0  18.9 -119.6 Analysis Plot     
     20240726 135522  SSMISF16   19.3 -119.7   135   N/A    2.34   -2.34      N/A   35.0  19.1 -119.7 Analysis Plot     
     20240726 144751  SSMISF17   19.1 -119.7   257   N/A    5.59   -5.59      N/A   35.0  19.1 -119.7 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.