Tropical Storm 30Y_09

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              
     20211212 073051   -2.9      N/A   N/A   22.22    2.87  30.0 SSMI16   4.6 -144.4    4.6 -144.4    4.1 -143.6 Analysis Plot     
     20211212 100240   -3.0      N/A   N/A   33.33    2.97  30.0 SSMI17   4.7 -144.3    4.7 -144.3    4.8 -144.3 Analysis Plot     
     20211212 192945 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18   5.6 -144.1    5.6 -144.1    5.2 -144.3 Analysis Plot     
     20211212 220438 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17   5.8 -144.3    5.8 -144.3    5.2 -144.0 Analysis Plot     
     20211213 072848 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16   5.9 -141.3    5.9 -141.3    6.2 -141.7 Analysis Plot     
     20211213 091929    N/A      N/A   N/A     N/A     N/A  30.0 SSMI18   5.8 -141.3    5.8 -141.3    5.9 -140.6 Analysis Plot     
     20211213 205836    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16   6.7 -138.3    6.7 -138.3    7.2 -138.0 Analysis Plot     
     20211214 090632   -5.7      N/A  31.5%  55.55    5.66  50.0 SSMI18   7.7 -135.7    7.7 -135.7    8.0 -135.5 Analysis Plot     
     20211214 204531   42.8  >65 kts 100.0%  44.44   27.83  55.0 SSMI16   8.6 -133.3    8.6 -133.3    8.8 -133.0 Analysis Plot     
     20211214 205322   44.1  >65 kts 100.0%  44.44   29.15  55.0 SSMI18   8.6 -133.3    8.6 -133.3    8.8 -132.9 Analysis Plot     
     20211215 042028   42.9  >65 kts 100.0%  33.33   27.87  60.0  AMSR2   9.2 -132.3    9.0 -131.4    9.0 -131.4 Analysis Plot     
     20211215 203858   41.3  >65 kts 100.0%  22.22   26.31  75.0 SSMI18   9.1 -128.8    9.5 -128.6    9.5 -128.6 Analysis Plot     
     20211215 230440   39.5  >65 kts 100.0%  22.22   24.51  75.0 SSMI17   9.0 -128.5    9.6 -128.0    9.6 -128.0 Analysis Plot     
     20211216 084156   22.8  >65 kts  98.6%  33.33    7.79 100.0 SSMI16   9.6 -125.9    9.9 -125.5    9.9 -125.5 Analysis Plot     
     20211216 171932 -920.0      N/A 100.0%  11.11    2.19  95.0  AMSR2  10.1 -122.5    9.9 -122.4    9.9 -122.4 Analysis Plot     
     20211216 215741    1.4      N/A  46.6%  44.44    1.37  95.0 SSMI16  10.0 -122.3   10.2 -121.9   10.2 -121.9 Analysis Plot     
     20211217 082038   23.0  >65 kts  82.2%  88.88   22.97  80.0 SSMI18  10.1 -119.7   10.4 -119.4   10.4 -119.4 Analysis Plot     
     20211217 110126   22.4  >65 kts  46.6%  55.55   22.37  80.0 SSMI17  10.3 -119.7   10.3 -119.7   10.2 -118.9 Analysis Plot     
     20211217 180232    N/A      N/A   N/A     N/A     N/A  80.0  AMSR2  10.4 -117.0   10.4 -117.0   11.1 -117.7 Analysis Plot     
     20211217 215045   47.9  >65 kts 100.0%  66.66   32.93  80.0 SSMI18  10.6 -116.7   10.8 -116.7   10.8 -116.7 Analysis Plot     
     20211218 095611   64.2  >85 kts 102.8%  55.55   49.18  85.0 SSMI16  11.1 -114.5   11.5 -113.9   11.5 -113.9 Analysis Plot     
     20211218 103700   59.2  >65 kts 100.0%  55.55   44.18  85.0 SSMI17  11.1 -114.5   11.7 -113.9   11.7 -113.9 Analysis Plot     
     20211218 214412   48.2  >65 kts 100.0%  55.55   33.17 100.0 SSMI18  12.1 -112.2   12.8 -111.8   12.8 -111.8 Analysis Plot     
     20211219 094315    2.6      N/A   9.6%  66.66    2.58 105.0 SSMI16  13.6 -110.6   14.3 -110.8   14.3 -110.8 Analysis Plot     
     20211219 230016    3.2      N/A   N/A  177.76    3.24  90.0 SSMI16  15.9 -110.0   15.9 -110.0   16.8 -110.3 Analysis Plot     
     20211220 062009    4.4      N/A   N/A  122.21    4.38  70.0  AMSR2  18.3 -111.1   18.3 -111.1   18.4 -111.3 Analysis Plot     
     20211220 093013    3.2      N/A   N/A  211.09    3.20  70.0 SSMI16  18.3 -111.4   18.3 -111.4   18.4 -111.5 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.