Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning NHC estimate
20150921T010721 ssmis17 179.0 31.5% 3.5 -3.5 n/a   30.0 kts
20150921T015220 ssmis19 190.1 32.9% 3.1 -3.1 n/a   30.0 kts
20150921T022131 ssmis18 190.1 NaN% NaN NaN n/a   30.0 kts
20150921T124036 ssmis16 212.4 NaN% NaN NaN n/a   29.8 kts
20150921T134632 ssmis17 45.6 0.0% 0.3 -0.3 n/a   28.9 kts
20150921T142046 ssmis19 212.4 0.0% 2.9 -2.9 n/a   28.3 kts
20150921T145030 ssmis18 212.4 0.0% 2.1 -2.1 n/a   27.7 kts
20150922T013815 ssmis17 12.2 0.0% 0.2 -0.2 n/a   25.0 kts
20150922T014034 ssmis19 56.7 0.0% 0.0 -0.0 n/a   25.0 kts
20150922T021052 ssmis18 12.2 0.0% 0.2 -0.2 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.

Error messages in intensity scores: -920 is used when the hottest pixel in the eye is <200K, to prevent false positives; -909 is a failure to process (bad input data).