Tropical Depression 13W

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              
     20180720 200643   -5.1      N/A  31.5% 255.53    5.14  25.0 SSMI15  17.9 -117.4   17.9 -117.4   18.1 -117.3 Analysis Plot     
     20180720 205332 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  17.9 -117.5   17.9 -117.5   19.2 -116.9 Analysis Plot     
     20180721 000259   -0.8      N/A  15.1%  99.99     .81  25.0 SSMI17  17.9 -118.1   17.9 -118.1   17.8 -118.6 Analysis Plot     
     20180721 073906   -5.9      N/A  41.1%  55.55    5.91  25.0    GMI  18.3 -119.5   18.3 -119.5   18.6 -120.3 Analysis Plot     
     20180721 103920   -1.6      N/A  17.8% 122.21    1.57  30.0 SSMI17  18.8 -120.4   18.8 -120.4   18.9 -120.9 Analysis Plot     
     20180721 192408   -2.2      N/A  18.2% 222.20    2.23  30.0 SSMI15  20.2 -121.9   20.2 -121.9   19.4 -122.3 Analysis Plot     
     20180721 205637 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  20.5 -121.9   20.5 -121.9   19.6 -121.4 Analysis Plot     
     20180721 205639 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  20.5 -121.9   20.5 -121.9   20.8 -121.8 Analysis Plot     
     20180721 234900 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  20.8 -122.2   20.8 -122.2   20.4 -122.9 Analysis Plot     
     20180722 052330   -0.3      N/A  20.5%  33.33     .34  30.0  AMSR2  22.0 -123.1   22.0 -123.1   21.6 -123.7 Analysis Plot     
     20180722 064543   -4.3      N/A   1.4% 222.20    4.25  30.0    GMI  22.3 -123.2   22.3 -123.2   21.7 -124.0 Analysis Plot     
     20180722 120617   -1.7      N/A   4.1% 222.20    1.68  30.0 SSMI17  22.9 -124.3   22.9 -124.3   22.5 -124.4 Analysis Plot     
     20180722 200600 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  25.2 -124.2   25.2 -124.2   24.8 -124.2 Analysis Plot     
     20180722 233441 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  25.5 -123.7   25.5 -123.7   25.2 -124.3 Analysis Plot     
     20180723 043036   -0.8      N/A   N/A   11.11     .79  30.0  AMSR2  27.1 -123.5   27.1 -123.5   27.3 -123.6 Analysis Plot     
     20180723 061305   -3.1      N/A   N/A   66.66    3.11  30.0 SSMI15  28.4 -123.6   28.4 -123.6   28.2 -123.6 Analysis Plot     
     20180723 115307 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  29.5 -123.2   29.5 -123.2   29.4 -123.1 Analysis Plot     
     20180723 181410   -4.6      N/A   N/A   11.11    4.65  25.0  AMSR2  31.8 -122.6   31.8 -122.6   32.1 -122.4 Analysis Plot     
     20180723 204948   -3.0      N/A   N/A   11.11    3.03  25.0    GMI  32.3 -122.4   32.3 -122.4   33.1 -122.5 Analysis Plot     
     20180723 215556   -0.7      N/A   N/A   44.44     .72  25.0 SSMI16  32.4 -122.4   32.4 -122.4   33.1 -122.2 Analysis Plot     
     20180723 232002   -1.0      N/A   N/A   33.33    1.00  25.0 SSMI17  32.8 -122.3   32.8 -122.3   32.6 -121.7 Analysis Plot     
     20180723 233451   -0.4      N/A   N/A   22.22     .40  25.0 SSMI18  32.8 -122.3   32.8 -122.3   33.3 -122.1 Analysis Plot     
     20180724 051427   -2.8      N/A   N/A   11.11    2.82  25.0  AMSR2  34.5 -122.0   34.5 -122.0   34.5 -122.4 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.