Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20111102T024453 ssmis16 34.5 26.0% 1.4 -1.4 n/a   35.0 kts
20111102T034856 tmi 45.6 37.0% 4.3 -4.3 n/a   35.0 kts
20111102T135723 ssmis16 101.2 38.4% 6.4 -6.4 n/a   33.8 kts
20111102T141035 ssmis17 123.4 30.1% 2.6 -2.6 n/a   33.5 kts
20111102T184136 tmi 56.7 48.0% 13.8 -13.8 n/a   30.0 kts
20111103T023203 ssmis16 12.2 57.5% 9.3 -9.3 n/a   25.9 kts
20111103T025321 tmi 12.2 100.0% 22.2 -37.2 n/a   25.3 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.