Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120606T015346 ssmis16 67.8 6.8% 8.8 -8.8 n/a   38.8 kts
20120606T040110 ssmis18 90.1 52.0% 3.7 -3.7 n/a   42.6 kts
20120606T160753 tmi NaN 9.6% 0.0 -920.0 n/a   49.2 kts
20120606T165710 ssmis18 NaN 52.0% 0.0 -920.0 n/a   48.9 kts
20120607T001936 ssmi15 45.6 0.0% 5.9 -5.9 n/a   44.8 kts
20120607T014601 ssmis17 190.1 0.0% 2.7 -2.7 n/a   43.3 kts
20120607T015917 tmi 167.9 0.0% 2.0 -2.0 n/a   43.0 kts
20120607T020309 ssmis16 179.0 0.0% 3.2 -3.2 n/a   43.0 kts
20120607T020334 ssmis17 167.9 0.0% 1.5 -1.5 n/a   42.9 kts
20120607T144235 ssmis16 212.4 0.0% 1.6 -1.6 n/a   30.0 kts
20120607T151120 tmi 90.1 0.0% 1.0 -1.0 n/a   30.0 kts
20120607T164527 ssmis18 23.4 0.0% 0.9 -0.9 n/a   29.8 kts
20120608T004747 ssmi15 67.8 0.0% 1.1 -1.1 n/a   25.0 kts
20120608T012609 ssmis17 167.9 14.1% 5.0 -5.0 n/a   25.0 kts
20120608T015014 ssmis16 179.0 NaN% NaN NaN 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.