Tropical Storm 27W

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              
     20211129 163536  -17.2      N/A  35.6%  44.44   17.17  30.0  AMSR2  12.5 -140.8   12.5 -140.8   12.8 -140.2 Analysis Plot     
     20211129 204220  -11.2      N/A  38.4%  33.33   11.18  35.0 SSMI18  12.6 -140.1   12.6 -140.1   12.5 -140.0 Analysis Plot     
     20211130 071401 -930.0      N/A   N/A     N/A    0.00  35.0    GMI  13.3 -138.2   12.8 -138.3   12.8 -138.3 Analysis Plot     
     20211130 084307   -4.2      N/A   9.6% 222.20    4.23  40.0 SSMI18  13.0 -137.9   13.0 -137.9   12.7 -138.1 Analysis Plot     
     20211130 112718    N/A      N/A   N/A     N/A     N/A  40.0 SSMI17  13.2 -137.5   13.2 -137.5   13.2 -137.5 Analysis Plot     
     20211130 202918   -7.1      N/A   9.6% 166.65    7.07  40.0    GMI  13.4 -136.5   13.4 -136.5   14.0 -137.0 Analysis Plot     
     20211130 230400 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI17  13.5 -136.6   13.5 -136.6   14.0 -136.9 Analysis Plot     
     20211201 040904    1.5      N/A  46.6%  44.44    1.52  60.0  AMSR2  14.2 -136.1   14.1 -135.8   14.1 -135.8 Analysis Plot     
     20211201 110950   15.0      N/A  31.5%  33.33   15.04  60.0 SSMI17  14.8 -135.8   14.7 -136.0   14.7 -136.0 Analysis Plot     
     20211201 162241    9.7      N/A   9.6%  55.55    9.69  65.0  AMSR2  15.7 -135.6   15.5 -135.8   15.5 -135.8 Analysis Plot     
     20211201 201637   14.6      N/A  57.5%  77.77   14.64  70.0 SSMI18  16.2 -135.8   15.9 -135.8   15.9 -135.8 Analysis Plot     
     20211201 225959   15.6      N/A   5.5% 111.10   15.61  70.0 SSMI17  16.5 -135.8   16.4 -135.7   16.4 -135.7 Analysis Plot     
     20211202 070326   14.9      N/A  54.8%  77.77   14.89  80.0    GMI  17.5 -136.1   17.4 -135.9   17.4 -135.9 Analysis Plot     
     20211202 081001   44.4  >65 kts 100.0%  77.77   29.43  90.0 SSMI16  17.5 -135.9   17.5 -135.9   17.5 -135.9 Analysis Plot     
     20211202 110032   68.6  >85 kts 100.0%  77.77   53.63  90.0 SSMI17  18.0 -136.2   17.7 -136.2   17.7 -136.2 Analysis Plot     
     20211202 170538 -930.0      N/A   N/A     N/A    0.00 100.0  AMSR2  19.1 -137.4   19.3 -137.3   19.3 -137.3 Analysis Plot     
     20211202 195529   63.8  >85 kts 100.0%  66.66   48.84 100.0 SSMI18  19.4 -137.7   19.8 -137.8   19.8 -137.8 Analysis Plot     
     20211202 223717   76.2  >85 kts 100.0%  66.66   61.24 125.0 SSMI17  20.3 -138.3   20.4 -138.3   20.4 -138.3 Analysis Plot     
     20211203 035835   71.9  >85 kts 100.0%  66.66   56.88 125.0  AMSR2  21.6 -139.5   22.0 -140.0   22.0 -140.0 Analysis Plot     
     20211203 061030 -930.0      N/A   N/A     N/A    0.00 125.0    GMI  22.2 -140.1   22.7 -140.6   22.7 -140.6 Analysis Plot     
     20211203 073959 -930.0      N/A   N/A     N/A    0.00 120.0 SSMI18  22.7 -140.7   22.8 -140.7   22.8 -140.7 Analysis Plot     
     20211203 104659   15.0      N/A  67.1%  77.77   15.03 120.0 SSMI17  23.4 -141.5   23.3 -141.6   23.3 -141.6 Analysis Plot     
     20211203 160729    3.0      N/A   4.1% 166.65    2.97 110.0  AMSR2  24.6 -143.3   24.7 -143.7   24.7 -143.7 Analysis Plot     
     20211203 195057    2.6      N/A   N/A   44.44    2.62 110.0 SSMI18  25.0 -143.8   25.0 -143.8   25.3 -143.6 Analysis Plot     
     20211203 223301    2.1      N/A   3.0% 255.53    2.10  75.0 SSMI17  26.7 -145.8   26.7 -145.8   26.7 -146.3 Analysis Plot     
     20211204 030531   -1.0      N/A   N/A  111.10     .97  45.0  AMSR2  28.5 -147.0   28.5 -147.0   28.9 -146.9 Analysis Plot     
     20211204 051714   -5.5      N/A   N/A   66.66    5.47  45.0    GMI  28.9 -147.5   28.9 -147.5   28.9 -146.6 Analysis Plot     
     20211204 080308    N/A      N/A   N/A     N/A     N/A  45.0 SSMI18  29.2 -147.8   29.2 -147.8   29.1 -148.1 Analysis Plot     
     20211204 100933   -2.4      N/A   N/A  155.54    2.38  45.0 SSMI17  29.5 -148.2   29.5 -148.2   29.7 -148.9 Analysis Plot     
     20211204 184016 -930.0      N/A   N/A     N/A    0.00  45.0    GMI  30.5 -149.5   30.5 -149.5   30.9 -147.7 Analysis Plot     
     20211204 191850 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI18  30.5 -149.5   30.5 -149.5   30.3 -149.8 Analysis Plot     
     20211204 221115 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI17  30.7 -149.8   30.7 -149.8   30.0 -150.2 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.