Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20121029T143723 ssmis18 179.0 58.2% 3.5 -3.5 n/a   35.0 kts
20121030T003654 tmi 23.4 9.6% 3.5 -3.5 n/a   40.0 kts
20121030T025741 ssmis18 90.1 31.5% 3.7 -3.7 n/a   40.0 kts
20121030T102811 tmi 23.4 49.3% 0.0 -0.0 n/a   40.0 kts
20121030T103407 ssmi15 67.8 NaN% NaN NaN n/a   40.0 kts
20121030T114526 ssmis17 212.4 30.9% 7.2 -7.2 n/a   40.0 kts
20121030T120846 ssmis16 190.1 0.0% 5.0 -5.0 n/a   40.0 kts
20121030T140559 ssmis18 156.8 NaN% NaN NaN n/a   39.6 kts
20121031T010118 ssmis17 134.5 NaN% NaN NaN n/a   30.0 kts
20121031T030344 ssmis18 179.0 13.7% 5.0 -5.0 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).