Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20131019T095244 ssmis18 123.4 13.7% 6.4 -6.4 n/a   25.0 kts
20131019T171923 tmi 23.4 0.0% 0.7 -0.7 n/a   25.0 kts
20131020T051940 ssmi15 134.5 0.0% 6.7 -6.7 n/a   25.0 kts
20131020T094152 ssmis18 267.9 11.0% 7.2 -7.2 n/a   24.9 kts
20131020T094952 tmi 267.9 9.7% 12.1 -12.1 n/a   24.9 kts
20131020T162159 tmi 34.5 11.0% 3.7 -3.7 n/a   20.4 kts
20131020T174842 ssmi15 167.9 4.1% 3.2 -3.2 n/a   20.0 kts
20131020T194556 ssmis16 179.0 15.1% 4.2 -4.2 n/a   20.0 kts
20131020T205656 ssmis17 134.5 24.7% 0.2 -0.2 n/a   20.0 kts
20131020T221157 ssmis18 223.5 NaN% NaN NaN n/a   20.0 kts
20131021T050540 ssmi15 156.8 0.0% 4.5 -4.5 n/a   20.0 kts
20131021T070834 ssmis16 245.7 13.7% 6.6 -6.6 n/a   20.0 kts
20131021T081543 ssmis17 267.9 4.1% 5.8 -5.8 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).