Tropical Depression 01S

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              
     20180915 015950   -4.0      N/A  30.1%  99.99    3.97  35.0 SSMI18  -9.9  -72.0   -9.9  -72.0  -10.3  -71.6 Analysis Plot     
     20180915 024302   -4.9      N/A  32.9% 144.43    4.90  35.0 SSMI17 -10.0  -71.9  -10.0  -71.9  -10.5  -71.6 Analysis Plot     
     20180915 064508   -3.2      N/A  34.2%  33.33    3.18  35.0    GMI -10.1  -71.2  -10.1  -71.2  -10.5  -70.6 Analysis Plot     
     20180915 083855   -2.8      N/A  42.5%  66.66    2.78  40.0  AMSR2 -10.5  -70.6  -10.5  -70.6  -10.7  -70.5 Analysis Plot     
     20180915 120113    N/A      N/A   N/A     N/A     N/A  40.0 SSMI16 -10.6  -70.2  -10.6  -70.2  -10.9  -70.0 Analysis Plot     
     20180915 141749 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18 -10.8  -69.9  -11.1  -69.8  -11.1  -69.8 Analysis Plot     
     20180915 150044    N/A      N/A   N/A     N/A     N/A  45.0 SSMI17 -10.8  -69.8  -10.8  -69.8  -10.9  -69.5 Analysis Plot     
     20180915 210556    N/A      N/A   N/A     N/A     N/A  40.0  AMSR2 -10.7  -68.2  -10.7  -68.2  -11.4  -69.3 Analysis Plot     
     20180916 014707   -0.8      N/A  20.5%  66.66     .79  40.0 SSMI18 -11.1  -67.8  -11.1  -67.8  -11.3  -68.0 Analysis Plot     
     20180916 022954   -2.6      N/A  74.0%  11.11    2.56  40.0 SSMI17 -11.1  -67.7  -11.1  -67.7  -11.4  -67.6 Analysis Plot     
     20180916 114758   -1.7      N/A   N/A  222.20    1.67  35.0 SSMI16 -11.6  -65.8  -11.6  -65.8  -12.1  -65.7 Analysis Plot     
     20180916 135751   -1.4      N/A   N/A  177.76    1.40  35.0 SSMI18 -11.7  -65.4  -11.7  -65.4  -12.2  -65.4 Analysis Plot     
     20180916 144001   -1.2      N/A   N/A  122.21    1.21  35.0 SSMI17 -12.0  -65.4  -12.0  -65.4  -12.3  -65.4 Analysis Plot     
     20180916 233806   -4.3      N/A   N/A   77.77    4.27  35.0 SSMI15 -12.4  -63.9  -12.4  -63.9  -12.4  -63.7 Analysis Plot     
     20180917 063322   -3.7      N/A   4.1%  99.99    3.67  30.0    GMI -12.3  -62.3  -12.3  -62.3  -12.4  -62.5 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.