Tropical Depression 23W

Passive Microwave (PMW) Intensity Information
Advanced Dvorak Technique (ADT)
Version 8.2.1
 

         Overpass     Inten           Ring    Ring          Wind           Forecast        Final        Target  
       Date    Time   Score  Meaning   Pct    Diam  BTdiff   Est   Sat    Lat    Lon    Lat    Lon    Lat    Lon              
     20141228 075000 -930.0      N/A   N/A  177.76  1271.8  30.0 SSMI16   7.9 -127.9    7.9 -127.9    7.0 -128.3 Analysis Plot     
     20141228 182147  -29.3      N/A  86.3%  33.33   14.31  30.0 SSMI15   8.2 -126.7    8.2 -126.7    8.4 -126.3 Analysis Plot     
     20141228 203000  -39.6      N/A 100.0%  55.55   24.56  35.0 SSMI16   8.6 -126.4    8.6 -126.4    8.7 -126.3 Analysis Plot     
     20141228 225100   -3.5      N/A   8.2%  22.22    3.46  35.0 SSMI18   8.6 -126.2    8.6 -126.2    8.9 -126.4 Analysis Plot     
     20141229 073800   -4.7      N/A  31.5%  55.55    4.67  35.0 SSMI16   9.2 -125.1    9.2 -125.1    9.6 -125.2 Analysis Plot     
     20141229 114000  -15.3      N/A  76.7%  33.33   15.30  35.0 SSMI18   9.2 -124.6    9.2 -124.6    9.7 -124.5 Analysis Plot     
     20141229 201600 -930.0      N/A   N/A  199.98  1279.0  40.0 SSMI16  10.4 -122.8   10.4 -122.8   10.8 -124.0 Analysis Plot     
     20141229 222500 -930.0      N/A   N/A  244.42  1281.3  40.0 SSMI17  10.4 -122.5   10.4 -122.5   10.6 -123.6 Analysis Plot     
     20141230 074433 -930.0      N/A   N/A  333.30  1284.9  35.0 SSMI15  10.4 -120.9   10.4 -120.9   10.9 -122.3 Analysis Plot     
     20141230 093400 -930.0      N/A   N/A  188.87  1284.0  35.0 SSMI17  10.2 -120.6   10.2 -120.6   10.3 -122.1 Analysis Plot     
     20141230 112700 -930.0      N/A   N/A  144.43  1276.9  35.0 SSMI18  10.1 -120.4   10.1 -120.4   10.4 -121.6 Analysis Plot     
     20141230 200400 -930.0      N/A   N/A  277.75  1280.0  30.0 SSMI16   9.4 -121.5    9.4 -121.5    9.1 -122.0 Analysis Plot     
     20141230 221200   -2.0      N/A   N/A   88.88    1.97  30.0 SSMI17   9.2 -121.3    9.2 -121.3    9.0 -121.1 Analysis Plot     
     20141231 000700   -1.6      N/A   N/A   22.22    1.58  30.0 SSMI18   9.1 -121.1    9.1 -121.1    9.0 -121.1 Analysis Plot     
     20141231 082155   -2.2      N/A   N/A   55.55    2.19  25.0 SSMI15   8.7 -121.3    8.7 -121.3    8.0 -121.1 Analysis Plot     
     20141231 085300 -930.0      N/A   N/A  266.64  1276.1  25.0 SSMI16   8.5 -121.2    8.5 -121.2    7.6 -120.4 Analysis Plot     
     20141231 092100 -930.0      N/A   N/A  144.43  1279.9  25.0 SSMI17   8.5 -121.2    8.5 -121.2    7.6 -122.0 Analysis Plot     
     20141231 111400 -930.0      N/A   N/A  333.30  1280.0  25.0 SSMI18   8.3 -121.0    8.3 -121.0    7.6 -121.6 Analysis Plot     
     20141231 193833 -930.0      N/A   N/A  288.86  1282.7  25.0 SSMI15   7.9 -120.6    7.9 -120.6    7.1 -120.1 Analysis Plot     
     20141231 215900   -1.5      N/A   N/A   22.22    1.46  25.0 SSMI17   7.8 -120.3    7.8 -120.3    7.2 -120.1 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.