Tropical Depression 36W

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              
     20181231 090646   -0.1      N/A  11.0% 244.42     .07  25.0 SSMI16   8.4 -112.3    8.4 -112.3    8.4 -112.0 Analysis Plot     
     20181231 111822 -930.0      N/A   N/A     N/A    0.00  25.0 SSMI18   8.2 -112.0    8.2 -112.0    7.9 -113.0 Analysis Plot     
     20181231 114447   -0.6      N/A  13.7% 244.42     .63  25.0 SSMI18   8.2 -112.1    8.2 -112.1    8.7 -111.9 Analysis Plot     
     20181231 203906   -8.0      N/A  12.3% 144.43    8.04  30.0 SSMI15   6.5 -110.9    6.5 -110.9    6.6 -111.0 Analysis Plot     
     20190103 122846    N/A      N/A   N/A     N/A     N/A  35.0 SSMI17   6.4 -104.1    6.4 -104.1    6.7 -103.3 Analysis Plot     
     20190104 094720   -2.2      N/A   N/A   55.55    2.24  50.0 SSMI16   8.4 -100.3    8.4 -100.3    8.3 -100.3 Analysis Plot     
     20190104 111347   -2.4      N/A   5.5% 188.87    2.37  50.0 SSMI18   8.5 -100.1    8.5 -100.1    8.0 -100.6 Analysis Plot     
     20190104 120612   -2.8      N/A  12.3% 155.54    2.76  50.0 SSMI17   8.5 -100.0    8.5 -100.0    8.3 -100.6 Analysis Plot     
     20190104 183942 -930.0      N/A   N/A     N/A    0.00  50.0  AMSR2   8.9  -98.7    8.9  -98.7    8.6  -99.5 Analysis Plot     
     20190104 211433 -930.0      N/A   N/A     N/A    0.00  50.0    GMI   9.0  -98.4    9.0  -98.4    9.6  -98.9 Analysis Plot     
     20190104 225413 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI18   9.1  -98.3    9.1  -98.3    9.6  -98.6 Analysis Plot     
     20190105 003302   -1.4      N/A   N/A   66.66    1.38  50.0 SSMI18   9.1  -98.1    9.1  -98.1    8.9  -98.7 Analysis Plot     
     20190105 012434   -0.8      N/A   N/A   88.88     .77  50.0 SSMI17   9.1  -98.0    9.1  -98.0    9.5  -99.1 Analysis Plot     
     20190105 102203 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI15   9.4  -97.0    9.4  -97.0    9.2  -96.1 Analysis Plot     
     20190105 115247    N/A      N/A   N/A     N/A     N/A  50.0 SSMI18   9.5  -96.7    9.5  -96.7   10.1  -96.9 Analysis Plot     
     20190106 002232   -2.0      N/A   N/A  211.09    2.04  50.0 SSMI18  10.8  -94.2   10.8  -94.2   11.2  -93.8 Analysis Plot     
     20190106 011145   -1.2      N/A  16.2% 222.20    1.15  50.0 SSMI17  11.0  -93.9   11.0  -93.9   11.5  -94.4 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.