Tropical Depression 26W

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              
     20201220 092243 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  10.3 -114.6   10.3 -114.6   10.6 -114.8 Analysis Plot     
     20201220 225132 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  10.0 -112.8   10.0 -112.8   10.4 -112.8 Analysis Plot     
     20201221 055132 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2   9.4 -113.0    9.4 -113.0    9.5 -112.4 Analysis Plot     
     20201221 090935   -2.2      N/A   8.2% 233.31    2.19  25.0 SSMI16   9.1 -112.6    9.1 -112.6    9.5 -112.4 Analysis Plot     
     20201221 100822   -2.7      N/A   2.7% 188.87    2.73  25.0 SSMI15   9.1 -112.6    9.1 -112.6    9.6 -112.3 Analysis Plot     
     20201221 180807   -1.3      N/A   N/A   22.22    1.29  30.0  AMSR2   8.7 -111.3    8.7 -111.3    8.7 -110.5 Analysis Plot     
     20201221 214751 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15   8.6 -111.1    8.6 -111.1    8.4 -110.3 Analysis Plot     
     20201221 223859 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18   8.6 -111.0    8.6 -111.0    8.2 -110.7 Analysis Plot     
     20201222 063524 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2   7.7 -110.4    7.7 -110.4    8.1 -110.4 Analysis Plot     
     20201222 083126   -1.7      N/A   4.1% 166.65    1.69  25.0 SSMI16   7.7 -110.2    7.7 -110.2    8.4 -110.6 Analysis Plot     
     20201222 185247 -930.0      N/A   N/A     N/A    0.00  25.0  AMSR2   7.6 -108.9    7.6 -108.9    7.5 -107.7 Analysis Plot     
     20201222 213423   -5.7      N/A   4.1%  77.77    5.69  25.0 SSMI15   7.6 -108.7    7.6 -108.7    8.1 -108.8 Analysis Plot     
     20201222 221340   -1.8      N/A  11.0%  99.99    1.76  25.0 SSMI16   7.5 -108.6    7.5 -108.6    8.4 -108.9 Analysis Plot     
     20201222 222538   -2.8      N/A  15.1%  99.99    2.85  25.0 SSMI18   7.5 -108.6    7.5 -108.6    8.5 -108.8 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.