Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20111228T120230 ssmis16 34.5 79.5% 5.6 -5.6 n/a   35.0 kts
20111228T121229 ssmis17 NaN 84.9% 6.5 -920.0 n/a   35.0 kts
20111228T140101 ssmis18 12.2 75.3% 0.0 -0.0 n/a   35.0 kts
20111228T232227 ssmis17 101.2 0.0% 0.7 -0.7 n/a   35.0 kts
20111229T025236 ssmis18 -919.0 -999.0% -999.0 -909.0 n/a   35.0 kts
20111229T114226 ssmis17 23.4 79.5% 8.2 -8.2 n/a   36.5 kts
20111230T024038 ssmis18 123.4 100.0% 20.4 -35.4 n/a   46.6 kts
20111230T125904 ssmis16 78.9 75.3% 11.4 -11.4 n/a   61.0 kts
20111231T001438 ssmis17 67.8 100.0% 38.5 53.5 >65 kts   83.0 kts
20111231T002413 ssmis16 67.8 100.0% 35.4 50.4 >65 kts   83.3 kts
20111231T022249 ssmis18 67.8 100.0% 30.8 45.8 >65 kts   86.9 kts
20111231T125906 ssmis16 56.7 100.0% 24.9 39.9 >65 kts   90.0 kts
20111231T131316 ssmis17 56.7 100.0% 22.7 37.7 >65 kts   90.0 kts
20111231T144734 ssmis18 56.7 100.0% 21.8 36.8 >65 kts   90.0 kts
20120101T125134 ssmis16 101.2 38.4% 7.7 7.7 n/a   79.1 kts
20120101T130115 ssmis17 45.6 45.2% 4.3 4.3 n/a   79.4 kts
20120101T142032 ssmis18 67.8 NaN% NaN NaN n/a   81.7 kts
20120102T001444 ssmis17 101.2 41.1% 14.3 14.3 n/a   80.6 kts
20120102T122226 ssmis17 78.9 45.2% 5.6 5.6 n/a   72.5 kts
20120103T000230 ssmis17 190.1 35.6% 0.1 0.1 n/a   63.4 kts
20120103T013357 ssmis16 -919.0 -999.0% -999.0 -909.0 n/a   61.2 kts
20120103T033610 ssmis18 212.4 NaN% NaN NaN n/a   58.2 kts
20120103T123434 ssmis17 167.9 9.6% 8.6 -8.6 n/a   44.7 kts
20120103T154337 ssmis18 201.2 NaN% NaN NaN n/a   41.0 kts
20120104T012112 ssmis16 123.4 0.0% 0.0 -0.0 n/a   38.1 kts
20120104T032402 ssmis18 5.0 0.0% 0.1 -0.1 n/a   36.6 kts
20120104T133732 ssmis16 34.5 0.0% 3.5 -3.5 n/a   31.6 kts
20120104T155641 ssmis18 12.2 0.0% 5.5 -5.5 n/a   30.7 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.