Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20121117T214909 ssmi15 23.4 89.0% 11.6 -26.6 n/a   35.0 kts
20121118T003017 ssmis17 12.2 93.2% 8.8 -23.9 n/a   35.0 kts
20121118T023432 ssmis18 101.2 12.3% 3.5 -3.5 n/a   35.0 kts
20121118T114212 ssmis17 212.4 0.0% 3.1 -3.1 n/a   35.0 kts
20121118T115223 ssmis16 212.4 0.0% 3.3 -3.3 n/a   35.0 kts
20121118T135538 ssmis18 145.7 0.0% 3.7 -3.7 n/a   35.0 kts
20121119T000400 tmi 12.2 0.0% 0.7 -0.7 n/a   30.0 kts
20121119T001733 ssmis17 190.1 0.0% 3.7 -3.7 n/a   30.0 kts
20121119T002752 ssmis16 101.2 0.0% 1.4 -1.4 n/a   30.0 kts
20121119T023325 ssmis18 112.3 0.0% 3.1 -3.1 n/a   30.0 kts
20121119T112917 ssmis17 90.1 0.0% 3.6 -3.6 n/a   30.0 kts
20121119T113912 ssmis16 23.4 1.4% 1.5 -1.5 n/a   30.0 kts
20121119T130954 ssmis18 90.1 0.0% 3.0 -3.0 n/a   30.0 kts
20121119T145547 tmi 101.2 0.0% 5.8 -5.8 n/a   30.0 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).