Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20131114T194552 ssmi15 101.2 11.0% 5.0 -5.0 n/a   24.0 kts
20131114T222247 ssmis17 67.8 6.8% 2.0 -2.0 n/a   20.9 kts
20131115T095124 ssmis16 101.2 0.0% 3.7 -3.7 n/a   20.0 kts
20131115T124728 ssmis18 267.9 0.0% 2.2 -2.2 n/a   20.0 kts
20131115T214142 tmi 212.4 0.0% 2.5 -2.5 n/a   16.5 kts
20131115T224432 ssmis16 145.7 NaN% NaN NaN n/a   15.8 kts
20131116T012526 ssmis18 201.2 0.0% 1.4 -1.4 n/a   15.0 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).