Tropical Depression 03A

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              
     20201122 013939  -78.4      N/A 100.0%  33.33   63.36  40.0 SSMI16  10.6  -54.1   10.6  -54.1   10.6  -53.7 Analysis Plot     
     20201122 094053   72.2  >85 kts 100.0%  33.33   57.16 100.0  AMSR2  10.3  -52.0   10.4  -51.9   10.4  -51.9 Analysis Plot     
     20201122 140314    7.8      N/A  68.5%  22.22    7.78 100.0 SSMI15  10.3  -51.5   10.4  -51.4   10.4  -51.4 Analysis Plot     
     20201122 144333 -930.0      N/A   N/A     N/A    0.00  90.0    GMI  10.5  -51.0   10.5  -51.0   10.2  -51.0 Analysis Plot     
     20201123 015407    N/A      N/A   N/A     N/A     N/A  45.0 SSMI15  10.7  -49.9   10.7  -49.9   10.8  -49.8 Analysis Plot     
     20201123 024922   -1.7      N/A   N/A   33.33    1.66  45.0 SSMI18  10.7  -49.8   10.7  -49.8   10.7  -49.8 Analysis Plot     
     20201123 102358 -930.0      N/A   N/A     N/A    0.00  40.0  AMSR2  11.4  -48.9   11.4  -48.9   10.6  -49.5 Analysis Plot     
     20201123 131652   -0.0      N/A   N/A   99.99     .04  40.0 SSMI18  11.5  -48.7   11.5  -48.7   11.3  -48.8 Analysis Plot     
     20201123 134940 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI15  11.5  -48.8   11.5  -48.8   11.3  -48.6 Analysis Plot     
     20201124 015324   -2.0      N/A   8.2% 111.10    2.05  30.0 SSMI15  11.7  -46.6   11.7  -46.6   12.2  -46.8 Analysis Plot     
     20201124 030949   -1.8      N/A   4.1% 133.32    1.79  30.0 SSMI16  11.6  -46.4   11.6  -46.4   12.3  -46.7 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.