Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20110206T193259 ssmis18 34.5 100.0% 28.3 -43.3 n/a   43.9 kts
20110206T222914 tmi -919.0 -999.0% -999.0 -909.0 n/a   42.1 kts
20110207T020853 amsre 23.4 24.7% 15.8 -15.8 n/a   40.6 kts
20110207T080219 ssmis18 NaN 2.7% 6.8 -6.8 n/a   40.0 kts
20110207T130812 amsre NaN 0.0% 5.0 -5.0 n/a   38.3 kts
20110207T163917 tmi NaN 1.4% 2.1 -2.1 n/a   35.8 kts
20110207T173724 ssmis16 90.1 NaN% NaN NaN n/a   35.2 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.