Tropical Depression 18W


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              
     20180806 203621   -0.6      N/A   1.4% 155.54     .62  25.0 SSMI16  18.9 -133.4   18.9 -133.4   19.4 -133.1 Analysis Plot     
     20180806 221906   -2.0      N/A   N/A  266.64    1.97  25.0 SSMI18  18.9 -133.4   18.9 -133.4   18.8 -133.1 Analysis Plot     
     20180807 070700 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  19.3 -133.2   19.3 -133.2   18.9 -133.1 Analysis Plot     
     20180807 102952   -1.2      N/A   2.9% 255.53    1.21  25.0 SSMI18  19.2 -132.5   19.2 -132.5   20.0 -132.2 Analysis Plot     
     20180807 175237 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15  19.6 -133.0   19.6 -133.0   19.2 -132.8 Analysis Plot     
     20180807 202342   -1.6      N/A  13.7% 244.42    1.61  30.0 SSMI16  19.1 -132.5   19.1 -132.5   19.8 -132.2 Analysis Plot     
     20180807 220638 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  19.2 -132.5   19.2 -132.5   18.9 -133.1 Analysis Plot     
     20180808 012321 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  19.4 -132.6   19.4 -132.6   19.2 -132.8 Analysis Plot     
     20180808 042708   -1.0      N/A  13.7% 188.87    1.04  30.0  AMSR2  19.6 -132.8   19.6 -132.8   19.5 -132.9 Analysis Plot     
     20180808 064055 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  19.7 -132.9   19.7 -132.9   20.3 -132.3 Analysis Plot     
     20180808 101720 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  19.7 -133.5   19.7 -133.5   19.5 -134.0 Analysis Plot     
     20180808 114208   -0.9      N/A   N/A   66.66     .92  35.0 SSMI17  19.8 -133.6   19.8 -133.6   19.7 -133.8 Analysis Plot     
     20180808 144140    N/A      N/A   N/A     N/A     N/A  35.0    GMI  20.2 -134.0   20.2 -134.0   19.8 -134.4 Analysis Plot     
     20180808 163752   -1.9      N/A   2.7%  11.11    1.87  35.0  AMSR2  20.4 -134.1   20.4 -134.1   20.8 -133.6 Analysis Plot     
     20180808 195900   -1.6      N/A   N/A  144.43    1.57  35.0 SSMI16  20.5 -134.1   20.5 -134.1   20.7 -134.1 Analysis Plot     
     20180808 214531   -2.1      N/A   2.7% 211.09    2.07  35.0 SSMI18  20.9 -134.3   20.9 -134.3   21.1 -134.0 Analysis Plot     
     20180808 230854   -1.1      N/A   N/A  133.32    1.07  35.0 SSMI17  21.0 -134.3   21.0 -134.3   21.0 -134.0 Analysis Plot     
     20180809 062742 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  21.6 -133.5   21.6 -133.5   21.3 -133.3 Analysis Plot     
     20180809 112834 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  21.0 -133.0   21.0 -133.0   21.9 -133.3 Analysis Plot     
     20180809 194500 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  21.8 -133.3   21.8 -133.3   22.3 -133.2 Analysis Plot     
     20180809 225519   -2.2      N/A   N/A  122.21    2.15  40.0 SSMI17  22.8 -132.8   22.8 -132.8   22.9 -132.6 Analysis Plot     
     20180810 011346 -930.0      N/A   N/A     N/A    0.00  40.0    GMI  23.3 -132.7   23.3 -132.7   23.2 -131.9 Analysis Plot     
     20180810 041608   -4.8      N/A   9.6% 155.54    4.81  40.0  AMSR2  23.3 -131.8   23.3 -131.8   23.1 -131.8 Analysis Plot     
     20180810 075957   -4.5      N/A   9.6% 177.76    4.51  40.0 SSMI15  23.5 -131.7   23.5 -131.7   23.6 -131.7 Analysis Plot     
     20180810 110548   -2.8      N/A   3.0% 222.20    2.79  35.0 SSMI17  23.0 -131.6   23.0 -131.6   23.2 -132.1 Analysis Plot     
     20180810 143320   -1.6      N/A   N/A   99.99    1.62  35.0    GMI  23.5 -131.6   23.5 -131.6   23.7 -131.3 Analysis Plot     
     20180810 200203   -1.2      N/A   N/A  133.32    1.16  35.0 SSMI15  24.5 -130.5   24.5 -130.5   24.9 -130.6 Analysis Plot     
     20180810 224236 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  24.7 -130.1   24.7 -130.1   24.8 -130.4 Analysis Plot     
     20180811 002052 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  24.9 -129.7   24.9 -129.7   25.0 -129.7 Analysis Plot     
     20180811 045949 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  25.4 -128.5   25.4 -128.5   24.9 -128.3 Analysis Plot     
     20180811 073644 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  25.5 -128.4   25.5 -128.4   25.0 -128.5 Analysis Plot     
     20180811 074216 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  25.2 -128.0   25.2 -128.0   25.7 -128.3 Analysis Plot     
     20180811 113021    N/A      N/A   N/A     N/A     N/A  35.0 SSMI18  25.5 -127.3   25.5 -127.3   24.8 -127.1 Analysis Plot     
     20180811 170735   -5.0      N/A  42.5%  33.33    4.96  40.0  AMSR2  25.5 -125.8   25.5 -125.8   24.9 -125.5 Analysis Plot     
     20180811 192017    N/A      N/A   N/A     N/A     N/A  35.0 SSMI15  25.3 -125.3   25.3 -125.3   25.0 -125.0 Analysis Plot     
     20180811 225944 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  25.8 -124.6   25.8 -124.6   26.4 -125.6 Analysis Plot     
     20180812 001215 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI17  25.9 -124.3   25.9 -124.3   26.5 -125.4 Analysis Plot     
     20180812 010240 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  26.1 -124.0   26.1 -124.0   26.1 -124.5 Analysis Plot     
     20180812 073743   -2.9      N/A  13.7% 255.53    2.88  35.0 SSMI16  26.8 -123.5   26.8 -123.5   27.0 -123.7 Analysis Plot     
     20180812 092715 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  27.1 -123.2   27.1 -123.2   27.8 -123.5 Analysis Plot     
     20180812 142356    N/A      N/A   N/A     N/A     N/A  45.0    GMI  28.0 -122.0   28.0 -122.0   27.9 -121.7 Analysis Plot     
     20180812 174928    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2  29.0 -120.5   29.0 -120.5   29.0 -120.8 Analysis Plot     
     20180812 224518    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18  29.7 -119.7   29.7 -119.7   30.1 -120.0 Analysis Plot     
     20180812 235905   -4.7      N/A  41.1%  66.66    4.65  40.0 SSMI17  29.9 -119.4   29.9 -119.4   30.4 -119.8 Analysis Plot     
     20180813 071550 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  31.4 -117.7   31.4 -117.7   31.4 -118.7 Analysis Plot     
     20180813 120657   -1.5      N/A   2.7% 233.31    1.47  40.0 SSMI17  32.2 -116.7   32.2 -116.7   32.1 -116.7 Analysis Plot     
     20180813 150738 -930.0      N/A   N/A     N/A    0.00  40.0    GMI  32.8 -116.0   32.8 -116.0   32.8 -115.8 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.