Tropical Storm 15U

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              
     20210225 100124   -0.8      N/A  12.3%  77.77     .76  30.0 SSMI16 -13.4 -105.1  -13.4 -105.1  -13.4 -104.1 Analysis Plot     
     20210225 105851    N/A      N/A   N/A     N/A     N/A  30.0 SSMI15 -13.4 -105.2  -13.4 -105.2  -13.2 -104.1 Analysis Plot     
     20210225 220058 -930.0      N/A   N/A     N/A    0.00  35.0 SSMI18 -14.0 -101.7  -14.0 -101.7  -13.7 -101.3 Analysis Plot     
     20210226 101006 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI18 -14.6  -98.1  -14.6  -98.1  -13.8  -98.3 Analysis Plot     
     20210226 184616   -9.0      N/A  39.7% 144.43    8.99  50.0  AMSR2 -14.5  -95.2  -14.9  -95.6  -14.9  -95.6 Analysis Plot     
     20210226 225451   -9.9      N/A  52.1%  66.66    9.92  50.0 SSMI16 -14.6  -94.6  -14.6  -94.9  -14.6  -94.9 Analysis Plot     
     20210226 232718 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI18 -14.7  -94.5  -15.0  -94.8  -15.0  -94.8 Analysis Plot     
     20210227 070021   16.0      N/A  49.3%  66.66   15.97  60.0  AMSR2 -15.1  -94.1  -15.4  -94.0  -15.4  -94.0 Analysis Plot     
     20210227 110602    7.8      N/A  50.7%  55.55    7.83  60.0 SSMI16 -15.4  -93.7  -16.1  -93.2  -16.1  -93.2 Analysis Plot     
     20210227 192944   26.8  >65 kts  56.2%  66.66   26.79  60.0  AMSR2 -16.5  -92.5  -16.5  -92.3  -16.5  -92.3 Analysis Plot     
     20210227 224147   22.2  >65 kts  43.8%  66.66   22.24  60.0 SSMI16 -16.7  -92.3  -16.5  -92.3  -16.5  -92.3 Analysis Plot     
     20210227 231600   15.5      N/A  56.2%  66.66   15.54  60.0 SSMI18 -16.7  -92.2  -16.6  -92.2  -16.6  -92.2 Analysis Plot     
     20210228 074157   43.1  >65 kts 100.0%  66.66   28.12  65.0  AMSR2 -17.2  -91.5  -17.2  -91.5  -17.2  -91.5 Analysis Plot     
     20210228 112542    9.1      N/A  57.5%  55.55    9.06  65.0 SSMI18 -17.3  -91.3  -17.4  -91.2  -17.4  -91.2 Analysis Plot     
     20210228 223058    5.7      N/A  24.7%  66.66    5.68  80.0 SSMI16 -17.8  -90.7  -17.7  -90.7  -17.7  -90.7 Analysis Plot     
     20210228 230246   24.2  >65 kts  65.8% 155.54   24.25  80.0 SSMI18 -17.8  -90.6  -17.7  -90.5  -17.7  -90.5 Analysis Plot     
     20210301 104107   16.0      N/A  49.3% 111.10   15.97  80.0 SSMI16 -18.0  -89.9  -18.4  -89.9  -18.4  -89.9 Analysis Plot     
     20210301 111304   12.1      N/A  57.5% 111.10   12.09  80.0 SSMI18 -18.1  -89.9  -18.4  -89.9  -18.4  -89.9 Analysis Plot     
     20210301 225033    9.8      N/A  52.1% 111.10    9.85  80.0 SSMI18 -18.4  -89.4  -18.4  -89.7  -18.4  -89.7 Analysis Plot     
     20210302 110021    3.0      N/A   1.4%  88.88    3.04  80.0 SSMI18 -18.7  -89.8  -18.6  -90.0  -18.6  -90.0 Analysis Plot     
     20210302 223834 -930.0      N/A   N/A     N/A    0.00  75.0 SSMI18 -18.6  -90.7  -18.7  -91.0  -18.7  -91.0 Analysis Plot     
     20210303 104744   -6.0      N/A   2.7% 222.20    6.01  50.0 SSMI18 -19.2  -91.8  -19.2  -91.8  -19.3  -91.9 Analysis Plot     
     20210303 190557   -2.5      N/A   N/A  155.54    2.47  50.0  AMSR2 -19.9  -93.1  -19.9  -93.1  -20.0  -93.0 Analysis Plot     
     20210303 222638 -930.0      N/A   N/A     N/A    0.00  50.0 SSMI18 -20.0  -93.4  -20.0  -93.4  -19.8  -93.3 Analysis Plot     
     20210304 071640   -6.9      N/A  13.7% 222.20    6.87  45.0  AMSR2 -21.2  -93.6  -21.3  -93.7  -21.3  -93.7 Analysis Plot     
     20210304 103504   -5.7      N/A   8.2% 199.98    5.71  45.0 SSMI18 -21.5  -93.8  -21.5  -93.8  -21.5  -94.1 Analysis Plot     
     20210305 080000 -930.0      N/A   N/A     N/A    0.00  45.0  AMSR2 -23.9  -95.0  -23.9  -95.0  -23.9  -95.0 Analysis Plot     
     20210305 224113   -1.4      N/A   N/A  211.09    1.42  40.0 SSMI15 -25.4  -95.6  -25.4  -95.6  -25.3  -95.6 Analysis Plot     
     20210306 111613 -930.0      N/A   N/A     N/A    0.00  40.0 SSMI16 -26.5  -96.2  -26.5  -96.2  -27.4  -97.0 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.