Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20100830T214530 ssmi15 NaN 0.0% 0.0 -0.0 n/a   40.0 kts
20100830T225205 tmi NaN 0.0% 1.8 -1.8 n/a   40.0 kts
20100831T054123 amsre NaN 8.2% 4.7 -4.7 n/a   35.0 kts
20100831T090130 ssmi15 NaN 4.1% 1.7 -1.7 n/a   35.0 kts
20100831T170130 tmi NaN 0.0% 0.0 -0.0 n/a   31.1 kts
20100831T174915 amsre NaN 0.0% 2.7 -2.7 n/a   30.2 kts
20100831T213030 ssmi15 NaN 0.0% 1.6 -1.6 n/a   23.1 kts
20100901T000711 ssmis18 NaN 0.0% 0.0 -0.0 n/a   20.0 kts
20100901T084530 ssmi15 NaN 0.0% 7.7 -7.7 n/a   17.8 kts
20100901T112423 ssmis18 NaN 0.0% 0.0 -0.0 n/a   15.6 kts
20100901T160502 tmi NaN 0.0% 0.0 -0.0 n/a   15.0 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.