Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120327T204852 ssmi15 201.2 9.6% 5.6 -5.6 n/a   30.0 kts
20120328T203519 ssmi15 156.8 19.2% 1.5 -1.5 n/a   30.0 kts
20120329T112215 tmi 67.8 19.2% 2.8 -2.8 n/a   43.9 kts
20120329T122452 ssmis18 145.7 52.0% 3.6 -3.6 n/a   45.7 kts
20120329T201739 ssmi15 34.5 28.8% 13.5 13.5 n/a   59.7 kts
20120329T211348 tmi 67.8 35.6% 7.5 7.5 n/a   61.7 kts
20120329T220850 ssmis17 45.6 46.6% 10.2 10.2 n/a   63.4 kts
20120330T095351 ssmis16 56.7 27.4% 9.1 9.1 n/a   65.0 kts
20120330T121241 ssmis18 56.7 21.9% 15.7 15.7 n/a   65.0 kts
20120330T215642 ssmis17 90.1 20.6% 0.7 0.7 n/a   61.4 kts
20120331T005149 ssmis18 112.3 27.4% 6.4 6.4 n/a   60.0 kts
20120331T005150 ssmis18 112.3 31.5% 9.2 9.2 n/a   60.0 kts
20120331T085015 ssmi15 23.4 5.5% 0.0 0.0 n/a   60.0 kts
20120331T102019 ssmis17 78.9 NaN% NaN NaN n/a   60.0 kts
20120331T104147 ssmis16 67.8 12.3% 6.4 6.4 n/a   60.0 kts
20120331T232036 ssmis16 245.7 NaN% NaN NaN n/a   40.0 kts
20120401T003938 ssmis18 90.1 94.5% 19.8 -34.8 n/a   40.0 kts
20120401T083503 ssmi15 45.6 38.4% 21.7 -21.7 n/a   38.0 kts
20120401T101215 tmi 45.6 41.1% 20.8 -20.8 n/a   36.1 kts
20120401T101218 ssmis17 45.6 100.0% 24.4 -39.4 n/a   36.1 kts
20120401T102926 ssmis16 45.6 43.8% 22.6 -22.6 n/a   35.8 kts
20120401T200314 tmi 12.2 8.2% 1.2 -1.2 n/a   35.0 kts
20120401T211228 ssmi15 145.7 0.0% 0.0 -0.0 n/a   35.0 kts
20120401T230236 ssmis17 323.5 NaN% NaN NaN n/a   35.0 kts
20120401T230715 ssmis16 312.4 NaN% NaN NaN n/a   35.0 kts
20120402T102138 ssmis17 156.8 NaN% NaN NaN n/a   33.3 kts
20120402T130135 ssmis18 167.9 0.0% 0.9 -0.9 n/a   31.0 kts
20120402T190700 tmi -919.0 -999.0% -999.0 -909.0 n/a   25.0 kts
20120402T205551 ssmi15 112.3 0.0% 0.6 -0.6 n/a   25.0 kts

Key:

Diameter values indicate the estimated surface eyewall diameter (the MI eyewall edge diameter minus 10 km).

Diameter values are red if Ring % <= 65, yellow/brown if Ring % <= 85 and green if Ring % > 85.

"Ring %" 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.

"Tb diff" is the difference between the "hot spot" (warmest eye pixel) and the warmest pixel on the eyewall.

Scores are listed as negative, and not used, when the JTWC or NHC estimated Vmax is <50 kts in order to rule out weak but highly symmetric TCs.