Tropical Depression 31W


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              
     20181021 172406 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI15   8.6 -156.9    8.6 -156.9    9.6 -156.6 Analysis Plot     
     20181021 191039   -1.1      N/A   8.5%  77.77    1.06  25.0 SSMI16   8.6 -156.8    8.6 -156.8    9.7 -156.4 Analysis Plot     
     20181021 201423 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18   8.7 -156.7    8.7 -156.7    9.4 -155.9 Analysis Plot     
     20181022 071116   -0.8      N/A   1.4% 122.21     .80  35.0 SSMI16   9.4 -155.3    9.4 -155.3    9.6 -154.6 Analysis Plot     
     20181022 071116   -0.8      N/A   1.4% 122.21     .80  35.0 SSMI18   9.4 -155.3    9.4 -155.3    9.6 -154.6 Analysis Plot     
     20181022 092629 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18  10.1 -154.6   10.1 -154.6   10.1 -154.0 Analysis Plot     
     20181022 093611 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI17  10.1 -154.5   10.1 -154.5   10.0 -154.1 Analysis Plot     
     20181022 151706    N/A      N/A   N/A     N/A     N/A  45.0    GMI  10.9 -153.3   10.9 -153.3   10.9 -153.6 Analysis Plot     
     20181022 185728    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16  11.2 -152.8   11.2 -152.8   11.1 -152.9 Analysis Plot     
     20181022 213525    1.0      N/A  11.0% 111.10     .97  60.0 SSMI17  11.1 -152.3   11.1 -152.3   11.4 -152.7 Analysis Plot     
     20181023 031052    2.3      N/A  38.4%  55.55    2.31  65.0  AMSR2  11.8 -151.2   11.7 -150.9   11.7 -150.9 Analysis Plot     
     20181023 064707   30.9  >65 kts  91.8%  33.33   15.92  65.0 SSMI15  11.9 -151.0   11.8 -150.9   11.8 -150.9 Analysis Plot     
     20181023 094757   11.5      N/A  71.2%  88.88   11.46  75.0 SSMI18  12.1 -150.3   12.0 -150.3   12.0 -150.3 Analysis Plot     
     20181023 152603   94.7  >85 kts 100.0%  55.55   79.68  90.0  AMSR2  12.4 -149.1   12.4 -149.3   12.4 -149.3 Analysis Plot     
     20181023 184340   58.3  >65 kts 100.0%  55.55   43.32  90.0 SSMI16  12.6 -148.8   12.7 -149.1   12.7 -149.1 Analysis Plot     
     20181023 211513   78.1  >85 kts 100.0%  44.44   63.12 110.0 SSMI18  12.9 -148.6   13.0 -148.5   13.0 -148.5 Analysis Plot     
     20181024 035450   94.3  >85 kts 100.0%  44.44   79.26 130.0  AMSR2  13.6 -147.6   13.8 -147.5   13.8 -147.5 Analysis Plot     
     20181024 044624   64.3  >85 kts 100.0%  33.33   49.26 130.0 SSMI15  13.9 -147.1   13.9 -147.3   13.9 -147.3 Analysis Plot     
     20181024 083714   65.9  >85 kts 100.0%  33.33   50.90 145.0 SSMI16  14.1 -146.9   13.9 -146.9   13.9 -146.9 Analysis Plot     
     20181024 090019   71.4  >85 kts 100.0%  33.33   56.35 145.0 SSMI18  14.1 -146.7   14.0 -146.8   14.0 -146.8 Analysis Plot     
     20181024 150805   87.8  >85 kts 100.0%  33.33   72.77 155.0    GMI  14.9 -145.7   15.0 -145.7   15.0 -145.7 Analysis Plot     
     20181024 160808   24.0  >65 kts  91.8%  88.88    9.01 155.0  AMSR2  15.0 -145.5   15.2 -145.5   15.2 -145.5 Analysis Plot     
     20181024 172452   57.1  >65 kts 100.0%  33.33   42.10 155.0 SSMI15  15.1 -145.3   15.3 -145.4   15.3 -145.4 Analysis Plot     
     20181024 211115   54.3  >65 kts 100.0%  33.33   39.35 155.0 SSMI18  15.3 -144.9   15.6 -144.9   15.6 -144.9 Analysis Plot     
     20181025 082412   20.0  >65 kts  53.4%  33.33   20.01 145.0 SSMI16  16.3 -143.0   15.9 -143.1   15.9 -143.1 Analysis Plot     
     20181025 100921    9.7      N/A  43.8%  33.33    9.69 145.0 SSMI17  16.1 -142.6   16.1 -142.8   16.1 -142.8 Analysis Plot     
     20181025 194212   55.9  >65 kts 100.0% 111.10   40.86 130.0 SSMI17  16.6 -141.2   16.6 -141.3   16.6 -141.3 Analysis Plot     
     20181025 223944   61.7  >85 kts 100.0% 111.10   46.73 130.0 SSMI17  16.7 -140.6   16.7 -140.9   16.7 -140.9 Analysis Plot     
     20181026 034339   72.1  >85 kts 100.0%  77.77   57.06 130.0  AMSR2  17.0 -139.6   16.8 -139.6   16.8 -139.6 Analysis Plot     
     20181026 081047   70.1  >85 kts 100.0%  77.77   55.15 130.0 SSMI16  16.9 -138.6   16.9 -139.2   16.9 -139.2 Analysis Plot     
     20181026 090814   76.5  >85 kts 100.0%  77.77   61.49 130.0 SSMI17  17.0 -138.4   17.1 -138.5   17.1 -138.5 Analysis Plot     
     20181026 104108   77.2  >85 kts 100.0%  77.77   62.16 130.0 SSMI18  17.0 -138.1   16.9 -138.4   16.9 -138.4 Analysis Plot     
     20181026 145756   92.2  >85 kts 100.0%  77.77   77.16 135.0    GMI  17.3 -136.9   17.3 -136.9   17.3 -136.9 Analysis Plot     
     20181026 190915   94.2  >85 kts 100.0%  88.88   79.23 140.0 SSMI15  17.6 -136.1   17.5 -136.0   17.5 -136.0 Analysis Plot     
     20181026 221744   63.2  >85 kts 100.0%  88.88   48.18 140.0 SSMI18  17.7 -135.9   17.6 -135.3   17.6 -135.3 Analysis Plot     
     20181027 022304  102.7  >85 kts 100.0%  99.99   87.72 140.0    GMI  17.8 -134.3   17.7 -134.1   17.7 -134.1 Analysis Plot     
     20181027 042628   70.0  >85 kts 100.0%  99.99   54.97 140.0  AMSR2  17.8 -134.1   17.8 -133.6   17.8 -133.6 Analysis Plot     
     20181027 103809   53.0  >65 kts 100.0%  88.88   37.98 135.0 SSMI18  17.9 -132.7   17.8 -132.9   17.8 -132.9 Analysis Plot     
     20181027 163843   81.4  >85 kts 100.0%  99.99   66.43 130.0  AMSR2  17.9 -131.3   17.9 -131.3   17.9 -131.3 Analysis Plot     
     20181027 181529   71.7  >85 kts 100.0%  88.88   56.71 135.0 SSMI15  18.0 -131.0   17.9 -131.0   17.9 -131.0 Analysis Plot     
     20181027 220546   78.6  >85 kts 100.0%  99.99   63.56 135.0 SSMI18  18.0 -130.6   18.0 -130.7   18.0 -130.7 Analysis Plot     
     20181028 051034 -930.0      N/A   N/A     N/A    0.00 130.0  AMSR2  18.0 -129.3   18.0 -129.1   18.0 -129.1 Analysis Plot     
     20181028 121321   47.1  >65 kts 100.0%  88.88   32.14 130.0 SSMI17  17.9 -128.1   17.8 -128.5   17.8 -128.5 Analysis Plot     
     20181028 205257   12.3      N/A   N/A   44.44   12.29 105.0 SSMI16  17.3 -126.7   17.4 -126.8   17.4 -126.8 Analysis Plot     
     20181028 230952   17.1      N/A   9.6%  44.44   17.08 105.0 SSMI17  17.3 -126.2   17.0 -126.3   17.0 -126.3 Analysis Plot     
     20181029 021105   24.6  >65 kts  41.1% 122.21   24.58  90.0    GMI  16.8 -125.8   16.9 -125.8   16.9 -125.8 Analysis Plot     
     20181029 072057   41.8  >65 kts 100.0% 111.10   26.77  90.0 SSMI16  16.7 -125.1   16.8 -125.2   16.8 -125.2 Analysis Plot     
     20181029 085326   50.1  >65 kts 100.0% 111.10   35.09  90.0 SSMI15  16.7 -125.1   16.9 -125.2   16.9 -125.2 Analysis Plot     
     20181029 101318   17.8      N/A  34.2%  33.33   17.83  90.0 SSMI18  16.8 -124.7   16.8 -124.6   16.8 -124.6 Analysis Plot     
     20181029 120000   18.5      N/A  35.6%  33.33   18.53  90.0 SSMI17  16.8 -124.4   16.8 -124.7   16.8 -124.7 Analysis Plot     
     20181029 152818 -930.0      N/A   N/A     N/A    0.00  90.0    GMI  16.7 -123.5   16.9 -123.6   16.9 -123.6 Analysis Plot     
     20181029 202417   53.9  >65 kts 100.0%  44.44   38.90  90.0 SSMI15  16.8 -122.7   16.8 -122.7   16.8 -122.7 Analysis Plot     
     20181029 203936   62.1  >85 kts 100.0%  44.44   47.09  90.0 SSMI16  16.8 -122.6   16.8 -122.7   16.8 -122.7 Analysis Plot     
     20181029 232712   16.0      N/A 100.0%  33.33     .98  90.0 SSMI17  16.8 -122.1   16.9 -122.1   16.9 -122.1 Analysis Plot     
     20181030 045749    6.0      N/A  21.9%  33.33    6.02  80.0  AMSR2  16.9 -120.8   16.7 -120.7   16.7 -120.7 Analysis Plot     
     20181030 081113   10.9      N/A   9.6%  55.55   10.87  80.0 SSMI15  16.9 -120.6   16.8 -120.3   16.8 -120.3 Analysis Plot     
     20181030 114139   16.3      N/A  16.9% 277.75   16.29  70.0 SSMI18  17.1 -119.3   16.8 -120.1   16.8 -120.1 Analysis Plot     
     20181030 194023    2.8      N/A   5.5%  88.88    2.78  55.0 SSMI15  16.7 -118.7   16.7 -118.7   17.4 -119.1 Analysis Plot     
     20181031 020031    5.7      N/A  21.9% 177.76    5.72  55.0    GMI  17.6 -117.9   17.6 -117.9   17.8 -118.2 Analysis Plot     
     20181031 054038    N/A      N/A   N/A     N/A     N/A  55.0  AMSR2  17.9 -117.6   17.9 -117.6   17.9 -117.6 Analysis Plot     
     20181031 112855   -1.9      N/A   N/A   44.44    1.90  45.0 SSMI18  18.5 -117.3   18.4 -117.5   18.4 -117.5 Analysis Plot     
     20181031 113325 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI17  18.6 -117.3   18.7 -117.4   18.7 -117.4 Analysis Plot     
     20181031 151821   -7.9      N/A  39.7% 166.65    7.89  45.0    GMI  18.7 -117.2   18.8 -117.0   18.8 -117.0 Analysis Plot     
     20181031 175204    N/A      N/A   N/A     N/A     N/A  50.0  AMSR2  18.9 -117.0   18.9 -117.0   18.9 -117.0 Analysis Plot     
     20181031 225702   -4.4      N/A  37.0% 199.98    4.43  50.0 SSMI18  19.3 -116.9   19.3 -116.9   19.3 -116.8 Analysis Plot     
     20181101 083356    N/A      N/A   N/A     N/A     N/A  45.0 SSMI16  20.2 -116.3   20.2 -116.3   20.1 -116.4 Analysis Plot     
     20181101 111947   -1.4      N/A   N/A   44.44    1.43  45.0 SSMI17  20.4 -116.3   20.4 -116.3   20.1 -116.8 Analysis Plot     
     20181101 215040   -2.6      N/A   N/A   66.66    2.59  30.0 SSMI16  21.1 -115.8   21.1 -115.8   21.0 -115.9 Analysis Plot     
     20181101 224407   -1.5      N/A   N/A   55.55    1.50  30.0 SSMI18  21.1 -115.8   21.1 -115.8   21.0 -116.1 Analysis Plot     
     20181102 003024   -4.3      N/A   N/A  177.76    4.32  30.0 SSMI17  21.2 -115.7   21.2 -115.7   21.0 -115.7 Analysis Plot     
     20181102 015021 -930.0      N/A   N/A     N/A    0.00  30.0    GMI  21.3 -115.6   21.3 -115.6   21.4 -115.5 Analysis Plot     
     20181102 052908   -5.8      N/A   N/A  166.65    5.82  25.0  AMSR2  20.8 -116.2   20.8 -116.2   21.5 -116.2 Analysis Plot     
     20181102 082317   -2.6      N/A   N/A   44.44    2.63  25.0 SSMI17  20.8 -116.1   20.8 -116.1   21.0 -116.2 Analysis Plot     
     20181102 124745   -1.8      N/A   N/A   77.77    1.84  25.0 SSMI17  20.9 -116.1   20.9 -116.1   20.9 -116.2 Analysis Plot     
     20181102 173944   -8.4      N/A   N/A   33.33    8.40  25.0  AMSR2  21.0 -116.1   21.0 -116.1   20.7 -116.0 Analysis Plot     
     20181102 213727   -3.0      N/A   N/A   44.44    3.02  25.0 SSMI16  21.1 -116.1   21.1 -116.1   20.6 -115.9 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.