Tropical Storm 08W

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                 
     20260622 153736       GMI   14.3  147.1   N/A   N/A     N/A     N/A      N/A   25.0  14.4  147.2 Analysis Plot     
     20260622 162317     AMSR2   14.5  146.8     5    4%    2.20   -2.20      N/A   30.0  14.4  146.9 Analysis Plot     
     20260623 030933       GMI   14.7  145.6   112   11%    0.16   -0.16      N/A   35.0  14.8  145.1 Analysis Plot     
     20260623 031458     AMSR2   15.4  144.0   N/A   N/A     N/A     N/A      N/A   35.0  14.9  144.8 Analysis Plot     
     20260624 035641     AMSR2   15.9  141.2   N/A   N/A     N/A     N/A      N/A   30.0  15.7  140.6 Analysis Plot     
     20260624 160944     AMSR2   16.9  139.1   N/A   N/A     N/A     N/A      N/A   30.0  17.2  138.3 Analysis Plot     
     20260624 192430  SSMISF18   17.6  138.9   N/A   N/A     N/A     N/A      N/A   35.0  17.4  138.0 Analysis Plot     
     20260625 063722  SSMISF18   17.8  135.9   N/A   N/A     N/A     N/A      N/A   40.0  19.0  136.4 Analysis Plot     
     20260625 063724  SSMISF17   17.8  135.9   N/A   N/A     N/A     N/A      N/A   45.0  19.0  136.4 Analysis Plot     
     20260625 190917  SSMISF18   23.1  134.3   157   22%    3.28   -3.28      N/A   50.0  23.4  134.1 Analysis Plot     
     20260625 213019  SSMISF17   23.7  134.0    57   38%    8.01   -8.01      N/A   50.0  24.2  134.1 Analysis Plot     
     20260626 023223       GMI   26.1  134.3    12    6%    4.22   -4.22      N/A   50.0  26.1  133.9 Analysis Plot     
     20260626 034856     AMSR2   26.9  134.6   N/A   N/A     N/A     N/A      N/A   50.0  27.9  134.4 Analysis Plot     
     20260626 084805  SSMISF17   29.8  135.5    34   29%    2.82   -2.82      N/A   45.0  30.9  136.4 Analysis Plot     
     20260626 101113  SSMISF16   30.5  137.9   N/A   N/A     N/A     N/A      N/A   45.0  31.7  137.0 Analysis Plot     
     20260626 160145       GMI   33.3  137.4    79   14%    3.64   -3.64      N/A   35.0  33.5  138.4 Analysis Plot     
     20260626 185111  SSMISF18   34.2  141.3   N/A   N/A     N/A     N/A      N/A   45.0  35.3  140.7 Analysis Plot     
     20260626 211232  SSMISF17   37.3  140.1   N/A   N/A     N/A     N/A      N/A   45.0  35.7  140.8 Analysis Plot     
     20260626 223456  SSMISF16   37.1  140.5   N/A   N/A     N/A     N/A      N/A   45.0  36.0  141.6 Analysis Plot     
     20260627 025528     AMSR2   37.1  146.7    23   33%    4.06   -4.06      N/A   45.0  37.9  146.8 Analysis Plot     
     20260627 061304  SSMISF18   38.5  148.9    46   N/A    1.92   -1.92      N/A   40.0  38.6  148.6 Analysis Plot     
     20260627 065534  SSMISF17   38.8  149.8   N/A   N/A     N/A     N/A      N/A   40.0  38.8  149.0 Analysis Plot     
     20260627 081701  SSMISF16   39.3  151.0   112   N/A    4.92   -4.92      N/A   40.0  39.3  150.3 Analysis Plot     
     20260627 152338       GMI   40.7  158.5   N/A   N/A     N/A     N/A      N/A   40.0  41.8  156.4 Analysis Plot     
     20260627 191504  SSMISF17   42.6  162.3   N/A   N/A     N/A     N/A      N/A   40.0  43.5  160.1 Analysis Plot     
     20260627 203704  SSMISF16   43.6  163.4   N/A   N/A     N/A     N/A      N/A   40.0  44.0  161.1 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.