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   38.1 kts
20121030T003656 tmi 134.5 35.6% 3.1 -3.1 n/a   40.0 kts
20121030T102912 tmi 134.5 11.0% 3.0 -3.0 n/a   43.5 kts
20121030T114501 ssmis17 212.4 NaN% NaN NaN n/a   44.8 kts
20121031T093221 tmi 12.2 16.4% 1.2 -1.2 n/a   51.8 kts
20121031T101847 ssmi15 12.2 49.3% 0.0 -0.0 n/a   51.0 kts
20121031T115005 ssmis17 45.6 91.8% 11.1 -26.1 n/a   50.0 kts
20121031T121956 ssmis16 34.5 87.7% 5.9 -20.9 n/a   50.0 kts
20121031T141415 ssmis18 23.4 NaN% NaN NaN n/a   50.0 kts
20121031T225414 ssmi15 212.4 NaN% NaN NaN n/a   41.2 kts
20121101T002324 tmi 212.4 0.0% 0.8 -0.8 n/a   39.6 kts
20121101T004743 ssmis17 5.0 0.0% 0.5 -0.5 n/a   39.2 kts
20121101T005212 ssmis16 5.0 0.0% 1.3 -1.3 n/a   39.2 kts
20121101T025116 ssmis18 156.8 0.0% 0.4 -0.4 n/a   37.3 kts
20121101T113121 ssmis16 212.4 NaN% NaN NaN n/a   30.3 kts
20121101T120134 ssmi15 179.0 NaN% NaN NaN 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).