Tropical Depression 04W

Passive Microwave (PMW) Intensity Information
Hurricane Intensity Estimation (HIE) Algorithm
Version 9.0


         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20190628 202653   -2.7      N/A  11.0% 144.43    2.67  25.0 SSMI16  14.1 -132.6   14.1 -132.6   13.8 -132.6 Analysis Plot     
     20190628 214347   -1.9      N/A  17.8% 133.32    1.86  25.0 SSMI18  14.2 -132.5   14.2 -132.5   14.5 -132.3 Analysis Plot     
     20190629 044540    N/A      N/A   N/A     N/A     N/A  30.0  AMSR2  14.4 -131.8   14.4 -131.8   14.4 -131.8 Analysis Plot     
     20190629 082045   -3.6      N/A  23.3% 177.76    3.65  30.0 SSMI15  14.5 -131.6   14.5 -131.6   15.2 -131.6 Analysis Plot     
     20190629 114937 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  14.9 -131.2   14.9 -131.2   15.3 -131.9 Analysis Plot     
     20190629 152548 -930.0      N/A   N/A     N/A    0.00  40.0    GMI  15.1 -130.6   15.1 -130.6   15.8 -130.8 Analysis Plot     
     20190629 165903 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  15.4 -130.4   15.4 -130.4   15.7 -130.9 Analysis Plot     
     20190629 200123 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  15.5 -130.5   15.5 -130.5   15.9 -131.0 Analysis Plot     
     20190629 213054   -0.9      N/A   N/A  244.42     .90  35.0 SSMI18  15.7 -130.3   15.7 -130.3   15.8 -130.9 Analysis Plot     
     20190629 231641   -0.2      N/A   1.4% 222.20     .15  35.0 SSMI17  15.9 -130.1   15.9 -130.1   16.2 -130.4 Analysis Plot     
     20190630 113621 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  17.1 -127.6   17.1 -127.6   17.4 -128.0 Analysis Plot     
     20190630 185434   -2.5      N/A   N/A   22.22    2.53  20.0 SSMI15  19.3 -125.4   19.3 -125.4   19.2 -125.3 Analysis Plot     
     20190630 230301   -1.4      N/A   N/A   22.22    1.41  20.0 SSMI17  19.7 -124.8   19.7 -124.8   19.6 -125.0 Analysis Plot     
     20190701 043637 -930.0      N/A   N/A     N/A    0.00  20.0  AMSR2  20.3 -123.6   20.3 -123.6   19.8 -123.8 Analysis Plot     
     20190701 081549 -930.0      N/A   N/A     N/A    0.00  20.0 SSMI16  20.6 -123.1   20.6 -123.1   20.9 -122.6 Analysis Plot     
     20190701 092855 -930.0      N/A   N/A     N/A    0.00  20.0 SSMI18  20.7 -122.8   20.7 -122.8   21.1 -122.3 Analysis Plot

Legend:

  - Date/Time are determined from PMW imagery at Forecast (initial guess) Lat/Lon position.

  - Positive/Negative Latitude = North/South Hemisphere; Longitude = Western/Eastern Hemisphere.

  - "Ring Diam" value indicates the estimated surface eyewall diameter in km (the MI eyewall edge diameter minus 10 km).

  - "Ring Pct" is the percentage of the "ring" (eyewall inner boundary) that is 1) colder than the "hot spot" (warmest eye pixel) in the eye by 20K, or 2) the percentage that is a) colder than 232K and b) colder than the "hot spot" by 10K, whichever is greater.
  - Values are red if Ring % <= 65, yellow/brown if Ring % <= 85 and green if Ring % > 85.

  - "Tb diff" is the difference between the "hot spot" (warmest eye pixel) and the warmest pixel on the eyewall.

  - Intensity score are listed as negative, and not used, when the JTWC or NHC estimated Vmax is <55 kts in order to rule out weak but highly symmetric TCs.

  - Error messages in intensity scores: -920 is used when the hottest pixel in the eye is <200K, to prevent false positives; -930 means <85% of eyewall has observations/data.