Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20110715T084637 ssmis17 NaN 6.8% 3.2 -3.2 n/a   25.0 kts
20110715T162449 amsre NaN 8.2% 1.5 -1.5 n/a   29.1 kts
20110715T205840 tmi NaN 17.8% 0.0 -0.0 n/a   27.5 kts
20110716T051133 tmi 245.7 NaN% NaN NaN n/a   24.4 kts
20110716T080435 ssmis16 190.1 NaN% NaN NaN n/a   22.6 kts
20110716T101029 ssmis18 267.9 NaN% NaN NaN n/a   21.1 kts
20110716T205217 ssmis16 NaN 20.6% 2.2 -2.2 n/a   16.1 kts
20110716T224405 ssmis18 NaN 19.2% 1.2 -1.2 n/a   15.4 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.