Tropical Storm 01L

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              
     20210522 090431   -1.6      N/A  41.1%  22.22    1.61  40.0 SSMI16  34.2   62.2   34.2   62.2   34.5   62.1 Analysis Plot     
     20210522 090905    N/A      N/A   N/A     N/A     N/A  40.0 SSMI15  34.2   62.2   34.2   62.2   34.6   62.3 Analysis Plot     
     20210522 105258    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18  34.2   62.3   34.2   62.3   34.5   62.5 Analysis Plot     
     20210522 201352   -3.2      N/A   N/A   66.66    3.16  40.0 SSMI16  34.5   63.0   34.5   63.0   34.3   61.9 Analysis Plot     
     20210522 203023   -5.4      N/A   9.6%  33.33    5.37  35.0 SSMI15  34.5   62.4   34.5   62.4   34.4   62.0 Analysis Plot     
     20210522 222315   -4.0      N/A   N/A   33.33    3.96  35.0 SSMI18  34.5   62.4   34.5   62.4   34.4   62.3 Analysis Plot     
     20210522 234954   -3.3      N/A   N/A   33.33    3.28  35.0 SSMI17  34.6   62.3   34.6   62.3   34.3   61.8 Analysis Plot     
     20210523 040223   -4.1      N/A  19.2%  33.33    4.11  40.0    GMI  35.1   61.3   35.1   61.3   35.2   61.4 Analysis Plot     
     20210523 062220   -9.2      N/A  24.7%  22.22    9.21  40.0  AMSR2  35.3   60.9   35.4   61.0   35.4   61.0 Analysis Plot     
     20210523 091003   -8.4      N/A   N/A   66.66    8.35  40.0 SSMI15  35.7   60.5   35.8   60.5   35.8   60.5 Analysis Plot     
     20210523 103038   -3.0      N/A   N/A   99.99    3.05  40.0 SSMI18  35.8   60.4   35.8   60.4   35.8   60.8 Analysis Plot     
     20210523 120843   -5.0      N/A   N/A  177.76    5.01  40.0 SSMI17  35.9   60.1   35.9   60.1   36.0   60.2 Analysis Plot     
     20210523 172508    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2  36.9   58.9   36.9   58.9   36.9   58.9 Analysis Plot     
     20210523 193642   -5.1      N/A   N/A   33.33    5.12  35.0 SSMI16  37.2   58.3   37.2   58.3   36.8   57.9 Analysis Plot     
     20210523 233641   -5.7      N/A   N/A   33.33    5.73  35.0 SSMI17  37.9   57.0   37.9   57.0   37.0   57.1 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.