Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning NHC estimate
20120928T131159 ssmis17 23.4 0.0% 7.0 -7.0 n/a   39.0 kts
20120928T222620 ssmi15 179.0 NaN% NaN NaN n/a   30.6 kts
20120929T001046 ssmis16 212.4 NaN% NaN NaN n/a   30.0 kts
20120929T002833 ssmis17 201.2 17.8% 1.9 -1.9 n/a   30.0 kts
20120929T070817 tmi 112.3 0.0% 2.5 -2.5 n/a   29.5 kts
20120929T105454 ssmi15 23.4 0.0% 0.9 -0.9 n/a   25.4 kts
20120929T125824 ssmis17 56.7 0.0% 2.9 -2.9 n/a   25.0 kts
20120929T130512 ssmis16 134.5 0.0% 2.2 -2.2 n/a   25.0 kts
20120929T134025 tmi 67.8 NaN% NaN NaN n/a   25.0 kts
20120929T234613 ssmis16 67.8 0.0% 0.0 -0.0 n/a   24.4 kts
20120930T030520 ssmis18 101.2 0.0% 1.3 -1.3 n/a   22.5 kts
20120930T061206 tmi 23.4 0.0% 4.4 -4.4 n/a   20.0 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).