Tropical Storm 08U

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              
     20200223 085521   -7.9      N/A  34.2%  55.55    7.88  25.0 SSMI16 -12.5 -119.1  -12.5 -119.1  -12.4 -118.3 Analysis Plot     
     20200223 220038  -11.1      N/A   8.2%  55.55   11.09  30.0 SSMI18 -13.4 -118.2  -13.6 -118.2  -13.6 -118.2 Analysis Plot     
     20200224 062525   -1.2      N/A  11.0%  88.88    1.20  40.0    GMI -14.0 -117.6  -14.3 -117.7  -14.3 -117.7 Analysis Plot     
     20200224 084210   -0.4      N/A  31.5%  22.22     .36  40.0 SSMI16 -14.4 -117.7  -14.4 -117.7  -14.7 -118.0 Analysis Plot     
     20200224 101009    N/A      N/A   N/A     N/A     N/A  40.0 SSMI18 -14.4 -117.6  -14.4 -117.6  -15.0 -117.8 Analysis Plot     
     20200224 170902  -23.4      N/A  52.1%  33.33   23.44  45.0  AMSR2 -14.9 -117.1  -15.0 -117.3  -15.0 -117.3 Analysis Plot     
     20200224 214649  -26.7      N/A  86.3%  22.22   11.70  45.0 SSMI18 -15.1 -117.0  -15.0 -117.3  -15.0 -117.3 Analysis Plot     
     20200225 095729   61.1  >85 kts 100.0%  22.22   46.12  65.0 SSMI18 -15.5 -116.4  -15.7 -116.7  -15.7 -116.7 Analysis Plot     
     20200225 213348   71.5  >85 kts 100.0%  88.88   56.55  85.0 SSMI18 -16.0 -115.6  -15.7 -115.9  -15.7 -115.9 Analysis Plot     
     20200226 060404   61.2  >85 kts 100.0%  22.22   46.23  85.0  AMSR2 -16.3 -115.1  -16.1 -115.2  -16.1 -115.2 Analysis Plot     
     20200226 094452   38.9  >65 kts 100.0%  33.33   23.88  85.0 SSMI18 -16.3 -115.1  -16.2 -115.0  -16.2 -115.0 Analysis Plot     
     20200226 212446    N/A      N/A   N/A     N/A     N/A  80.0 SSMI16 -16.5 -114.6  -16.5 -114.6  -16.4 -114.6 Analysis Plot     
     20200227 094358    N/A      N/A   N/A     N/A     N/A  55.0 SSMI16 -17.0 -114.2  -17.0 -114.2  -17.1 -114.4 Analysis Plot     
     20200227 173921   -8.1      N/A  38.4%  44.44    8.08  50.0  AMSR2 -16.8 -113.8  -16.8 -113.8  -16.7 -113.8 Analysis Plot     
     20200227 211943   -8.0      N/A   8.2%  77.77    7.95  50.0 SSMI16 -16.6 -113.5  -16.6 -113.5  -16.5 -113.6 Analysis Plot     
     20200228 093054   -3.8      N/A  35.6%  66.66    3.84  45.0 SSMI16 -16.4 -112.9  -16.4 -112.9  -16.4 -112.7 Analysis Plot     
     20200228 182315    N/A      N/A   N/A     N/A     N/A  45.0  AMSR2 -16.1 -112.3  -15.8 -111.8  -15.8 -111.8 Analysis Plot     
     20200228 210628    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16 -16.1 -112.2  -16.1 -112.2  -15.3 -111.7 Analysis Plot     
     20200228 223901    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18 -16.1 -112.1  -16.1 -112.1  -15.2 -111.5 Analysis Plot     
     20200229 051428   -3.0      N/A   N/A   99.99    3.00  40.0    GMI -15.8 -111.4  -15.8 -111.4  -15.8 -111.4 Analysis Plot     
     20200229 091751   -0.5      N/A   N/A  222.20     .53  40.0 SSMI16 -15.5 -111.2  -15.5 -111.2  -15.3 -110.9 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.