Tropical Depression 24W

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              
     20180823 173239   -5.4      N/A   6.8%  77.77    5.44  25.0  AMSR2  23.9 -120.1   23.9 -120.1   24.1 -120.3 Analysis Plot     
     20180824 181605   -3.0      N/A  17.8%  88.88    2.96  30.0  AMSR2  25.0 -120.0   25.0 -120.0   25.3 -119.6 Analysis Plot     
     20180824 214016 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  25.0 -119.7   25.0 -119.7   25.8 -119.1 Analysis Plot     
     20180824 214207   -1.0      N/A   4.1%  99.99    1.03  30.0 SSMI16  25.0 -119.8   25.0 -119.8   25.2 -119.5 Analysis Plot     
     20180824 233943   -2.8      N/A   4.1% 133.32    2.84  30.0 SSMI18  25.0 -119.6   25.0 -119.6   25.5 -119.5 Analysis Plot     
     20180825 051203   -2.6      N/A  32.9%  22.22    2.59  25.0  AMSR2  24.9 -118.9   24.9 -118.9   25.3 -118.0 Analysis Plot     
     20180825 081223   -1.0      N/A   N/A   88.88    1.02  25.0 SSMI16  24.7 -117.5   24.7 -117.5   25.2 -118.4 Analysis Plot     
     20180825 101659 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18  24.6 -117.3   24.6 -117.3   25.0 -116.0 Analysis Plot     
     20180825 105956   -0.8      N/A   6.8% 111.10     .75  25.0    GMI  24.5 -117.1   24.5 -117.1   24.6 -116.8 Analysis Plot     
     20180825 111736 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  24.6 -117.2   24.6 -117.2   24.3 -115.8 Analysis Plot     
     20180825 204338   -1.5      N/A   N/A  233.31    1.46  25.0 SSMI15  24.2 -116.0   24.2 -116.0   24.2 -115.9 Analysis Plot     
     20180825 212854 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  24.2 -115.9   24.2 -115.9   24.5 -115.2 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.