Tropical Depression 04W


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              
     20210529 221550 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17   6.5 -134.1    6.5 -134.1    7.2 -134.4 Analysis Plot     
     20210530 041239   -6.4      N/A   9.6% 188.87    6.37  30.0  AMSR2   6.8 -133.4    6.8 -133.4    6.9 -133.5 Analysis Plot     
     20210530 080037 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16   6.8 -132.6    6.8 -132.6    7.3 -133.0 Analysis Plot     
     20210530 120629   -1.3      N/A   5.5% 177.76    1.33  30.0 SSMI17   7.0 -132.4    7.0 -132.4    7.6 -132.0 Analysis Plot     
     20210530 163007    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2   7.4 -131.6    7.4 -131.6    7.4 -131.4 Analysis Plot     
     20210530 203822   -3.1      N/A  37.0%  44.44    3.11  45.0 SSMI18   7.7 -131.2    7.7 -131.2    7.4 -130.3 Analysis Plot     
     20210531 074735 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI16   9.1 -129.6    9.1 -129.6    9.8 -128.6 Analysis Plot     
     20210531 094142   -4.5      N/A  24.7%  66.66    4.51  50.0 SSMI15   9.1 -129.6    9.1 -129.6    9.3 -129.3 Analysis Plot     
     20210531 120226 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI17   9.5 -129.2    9.5 -129.2   10.2 -128.5 Analysis Plot     
     20210531 211518 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI16  10.1 -128.1   10.1 -128.1    9.5 -128.7 Analysis Plot     
     20210531 233025   -3.0      N/A   6.0% 288.86    2.95  45.0 SSMI17  10.4 -127.8   10.4 -127.8   10.6 -127.9 Analysis Plot     
     20210601 090245   -7.6      N/A   N/A  177.76    7.61  40.0 SSMI15  10.8 -126.4   10.8 -126.4   10.9 -126.6 Analysis Plot     
     20210601 113939   -2.0      N/A   N/A   77.77    1.97  35.0 SSMI17  11.7 -126.1   11.7 -126.1   11.7 -126.0 Analysis Plot     
     20210601 175541 -930.0      N/A   N/A     N/A    0.00  30.0  AMSR2  11.9 -123.9   11.9 -123.9   12.3 -123.4 Analysis Plot     
     20210601 205248   -2.8      N/A  39.7%  88.88    2.77  30.0 SSMI16  12.1 -123.7   12.1 -123.7   12.0 -123.2 Analysis Plot     
     20210601 210619   -3.0      N/A  35.6%  99.99    2.98  30.0 SSMI15  12.1 -123.6   12.1 -123.6   12.0 -123.1 Analysis Plot     
     20210601 231559 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  12.3 -123.3   12.3 -123.3   12.6 -123.6 Analysis Plot     
     20210602 024152 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  13.1 -121.9   13.1 -121.9   13.5 -120.9 Analysis Plot     
     20210602 091337 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  13.6 -121.2   13.8 -120.7   13.8 -120.7 Analysis Plot     
     20210602 100442   -0.6      N/A  16.4%  88.88     .55  30.0 SSMI18  13.7 -121.1   13.7 -121.1   13.3 -120.8 Analysis Plot     
     20210602 214222  -15.9      N/A  58.9% 133.32   15.95  30.0 SSMI18  15.5 -119.6   15.5 -119.6   15.8 -119.3 Analysis Plot     
     20210603 052843 -930.0      N/A   N/A     N/A    0.00  35.0  AMSR2  17.3 -119.2   17.3 -119.2   16.7 -119.3 Analysis Plot     
     20210603 092937 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI15  17.9 -118.4   17.9 -118.4   18.0 -117.6 Analysis Plot     
     20210603 095157   -1.7      N/A   N/A   99.99    1.69  35.0 SSMI18  18.0 -118.4   18.0 -118.4   17.8 -118.7 Analysis Plot     
     20210603 111245   -4.5      N/A  26.0%  33.33    4.50  35.0 SSMI17  18.2 -118.4   18.2 -118.4   17.6 -118.1 Analysis Plot     
     20210603 174022    N/A      N/A   N/A     N/A     N/A  35.0  AMSR2  19.4 -118.5   19.4 -118.5   19.4 -118.5 Analysis Plot     
     20210603 212947   -1.1      N/A  21.9% 144.43    1.11  35.0 SSMI18  19.9 -118.8   19.9 -118.8   20.1 -117.8 Analysis Plot     
     20210603 221803    N/A      N/A   N/A     N/A     N/A  35.0 SSMI16  20.1 -118.9   20.1 -118.9   20.2 -117.7 Analysis Plot     
     20210604 023413 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  20.8 -119.2   20.8 -119.2   21.2 -119.3 Analysis Plot     
     20210604 083705 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI16  21.3 -119.9   21.3 -119.9   21.0 -120.0 Analysis Plot     
     20210604 093914 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI18  21.5 -120.1   21.5 -120.1   22.0 -119.5 Analysis Plot     
     20210604 102824 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI15  21.4 -120.0   21.4 -120.0   21.1 -120.0 Analysis Plot     
     20210604 105922 -930.0      N/A   N/A     N/A    0.00  30.0 SSMI17  21.8 -120.4   21.8 -120.4   21.8 -120.8 Analysis Plot     
     20210604 122321 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  22.3 -120.9   22.3 -120.9   22.0 -121.2 Analysis Plot     
     20210604 211645   -0.8      N/A   5.5%  99.99     .83  30.0 SSMI18  23.8 -123.1   23.8 -123.1   23.9 -123.2 Analysis Plot     
     20210604 215543   -1.5      N/A   1.4% 133.32    1.54  30.0 SSMI16  23.9 -123.4   23.9 -123.4   24.2 -123.6 Analysis Plot     
     20210605 014421 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  25.2 -124.8   25.2 -124.8   24.8 -125.5 Analysis Plot     
     20210605 051916   -2.4      N/A   5.5%  22.22    2.35  35.0  AMSR2  26.0 -125.7   26.0 -125.7   26.3 -125.8 Analysis Plot     
     20210605 092627 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18  27.0 -127.0   27.0 -127.0   27.7 -126.0 Analysis Plot     
     20210605 100554 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI16  27.2 -127.3   27.2 -127.3   27.9 -126.3 Analysis Plot     
     20210605 113052   -0.8      N/A   N/A   44.44     .80  35.0    GMI  27.9 -128.4   27.9 -128.4   27.7 -128.4 Analysis Plot     
     20210605 172506    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  29.7 -131.5   29.7 -131.5   29.5 -132.1 Analysis Plot     
     20210605 210331   -2.8      N/A   9.6% 222.20    2.79  25.0 SSMI18  30.3 -132.7   30.3 -132.7   30.4 -132.1 Analysis Plot     
     20210606 005443    N/A      N/A   N/A     N/A     N/A  25.0    GMI  31.6 -135.2   31.6 -135.2   31.8 -135.0 Analysis Plot     
     20210606 042507    N/A      N/A   N/A     N/A     N/A  25.0  AMSR2  32.5 -136.8   32.5 -136.8   32.5 -136.8 Analysis Plot     
     20210606 072716 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15  32.9 -137.7   32.9 -137.7   32.3 -138.2 Analysis Plot     
     20210606 074946 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI16  33.2 -138.3   33.2 -138.3   32.7 -139.6 Analysis Plot     
     20210606 091346   -3.1      N/A   N/A  133.32    3.11  25.0 SSMI18  33.5 -138.9   33.5 -138.9   33.0 -139.6 Analysis Plot     
     20210606 100815 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI17  33.8 -139.5   33.8 -139.5   32.8 -140.3 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.