Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning NHC estimate
20130515T001802 ssmis16 101.2 0.0% 0.7 -0.7 n/a   30.0 kts
20130515T185810 tmi 12.2 41.1% 0.0 -0.0 n/a   35.8 kts
20130516T020337 ssmis18 23.4 79.5% 0.0 -0.0 n/a   42.1 kts
20130516T124217 ssmis17 212.4 27.4% 6.0 -6.0 n/a   44.9 kts
20130516T130432 ssmis16 179.0 30.1% 6.0 -6.0 n/a   44.7 kts
20130516T152356 ssmis18 90.1 31.5% 0.0 -0.0 n/a   42.7 kts
20130516T225304 ssmi15 212.4 NaN% NaN NaN n/a   35.3 kts
20130516T233042 ssmis16 179.0 NaN% NaN NaN n/a   35.1 kts
20130517T013106 ssmis17 134.5 21.9% 2.4 -2.4 n/a   35.0 kts
20130517T013209 ssmis17 134.5 2.7% 0.0 -0.0 n/a   35.0 kts
20130517T085101 tmi 212.4 28.8% 8.0 -8.0 n/a   30.0 kts
20130517T125131 ssmis16 212.4 NaN% NaN NaN n/a   30.0 kts
20130517T151144 ssmis18 156.8 NaN% NaN NaN n/a   30.0 kts
20130517T184158 tmi 134.5 12.3% 4.6 -4.6 n/a   30.0 kts
20130517T223852 ssmi15 5.0 0.0% 3.4 -3.4 n/a   30.0 kts
20130517T225523 ssmi15 45.6 0.0% 1.7 -1.7 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).