Tropical Storm 18W

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              
     20190919 161458 -930.0      N/A   N/A     N/A    0.00  40.0    GMI  23.1 -127.8   23.1 -127.8   23.2 -127.6 Analysis Plot     
     20190919 193602 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI15  23.1 -127.6   23.1 -127.6   22.8 -127.6 Analysis Plot     
     20190919 204530 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16  23.1 -127.5   23.1 -127.5   23.3 -127.1 Analysis Plot     
     20190919 233333   -0.3      N/A   N/A   44.44     .26  40.0 SSMI17  23.3 -126.9   23.3 -126.9   23.8 -127.6 Analysis Plot     
     20190920 051851 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2  23.5 -126.4   23.5 -126.4   23.9 -126.8 Analysis Plot     
     20190920 082028 -930.0      N/A   N/A     N/A    0.00  45.0 SSMI15  23.5 -126.3   23.5 -126.3   23.6 -126.6 Analysis Plot     
     20190920 090508 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI16  23.4 -126.8   23.4 -126.8   23.5 -126.8 Analysis Plot     
     20190920 110410 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI18  23.6 -126.6   23.6 -126.6   23.8 -127.0 Analysis Plot     
     20190920 115307   -0.3      N/A   2.7% 133.32     .28  50.0 SSMI17  23.7 -126.6   23.7 -126.6   23.7 -127.3 Analysis Plot     
     20190920 190641 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI15  25.3 -126.3   25.3 -126.3   25.3 -126.3 Analysis Plot     
     20190920 203145    1.1      N/A  24.7% 277.75    1.12  55.0 SSMI16  25.5 -126.3   25.5 -126.3   25.3 -126.3 Analysis Plot     
     20190920 224234    0.6      N/A   N/A  177.76     .59  55.0 SSMI18  25.9 -126.1   25.9 -126.1   26.0 -126.0 Analysis Plot     
     20190920 232023    1.0      N/A   4.1% 177.76     .97  55.0 SSMI17  26.0 -126.1   26.0 -126.1   26.2 -126.1 Analysis Plot     
     20190921 084946    3.9      N/A   6.3% 133.32    3.93  60.0 SSMI16  27.8 -125.7   27.8 -125.7   27.5 -125.7 Analysis Plot     
     20190921 105134    2.6      N/A   N/A  122.21    2.63  60.0 SSMI18  28.3 -125.7   28.0 -125.6   28.0 -125.6 Analysis Plot     
     20190921 113954    8.9      N/A   8.2% 155.54    8.89  60.0 SSMI17  28.4 -125.7   28.4 -125.7   27.9 -125.8 Analysis Plot     
     20190921 160410    1.8      N/A   4.1% 188.87    1.75  60.0    GMI  29.4 -126.0   29.0 -126.1   29.0 -126.1 Analysis Plot     
     20190921 222922    1.0      N/A   9.6% 177.76     .99  60.0 SSMI18  30.4 -126.6   30.4 -126.6   30.5 -126.7 Analysis Plot     
     20190921 230631 -930.0      N/A   N/A     N/A    0.00  60.0 SSMI17  30.6 -126.7   30.6 -126.7   30.4 -126.4 Analysis Plot     
     20190922 064808    4.6      N/A  24.7% 244.42    4.60  55.0 SSMI16  32.4 -127.6   32.4 -127.6   32.4 -128.4 Analysis Plot     
     20190922 103900 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI18  33.7 -129.0   33.7 -129.0   32.8 -129.1 Analysis Plot     
     20190922 111703 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI17  33.8 -129.1   33.8 -129.1   33.3 -129.8 Analysis Plot     
     20190922 151329    5.2      N/A  20.5%  88.88    5.20  55.0    GMI  34.8 -130.5   34.8 -130.5   35.6 -130.7 Analysis Plot     
     20190922 171110    3.0      N/A  76.7%  33.33    2.97  55.0  AMSR2  35.5 -131.3   35.5 -131.3   35.5 -132.1 Analysis Plot     
     20190922 200530 -930.0      N/A   N/A     N/A    0.00  55.0 SSMI16  35.8 -132.1   35.8 -132.1   35.6 -131.4 Analysis Plot     
     20190922 221657    4.7      N/A   N/A   55.55    4.67  55.0 SSMI18  36.4 -133.1   36.4 -133.1   36.4 -133.0 Analysis Plot     
     20190922 225339    4.3      N/A   N/A   44.44    4.29  55.0 SSMI17  36.6 -133.4   36.6 -133.4   36.5 -133.4 Analysis Plot     
     20190923 041424    5.4      N/A   N/A   33.33    5.45  55.0  AMSR2  38.5 -135.9   38.5 -135.9   38.8 -135.6 Analysis Plot     
     20190923 070417    2.6      N/A   N/A   33.33    2.60  55.0 SSMI15  38.9 -136.5   38.9 -136.5   39.4 -136.3 Analysis Plot     
     20190923 110338    1.5      N/A   N/A   77.77    1.49  55.0 SSMI17  40.5 -139.1   40.5 -139.1   40.1 -140.4 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.