Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20130508T141728 ssmis18 NaN 65.8% 0.0 -920.0 n/a   37.6 kts
20130508T231716 ssmis16 56.7 79.5% 0.0 -0.0 n/a   40.0 kts
20130509T092429 ssmi15 190.1 NaN% NaN NaN n/a   41.0 kts
20130509T114119 ssmis17 101.2 NaN% NaN NaN n/a   42.3 kts
20130509T120307 ssmis16 67.8 80.8% 0.0 -0.0 n/a   42.5 kts
20130509T135835 ssmis18 12.2 65.8% 0.0 -0.0 n/a   43.7 kts
20130509T230508 ssmis16 12.2 67.1% 0.0 -0.0 n/a   43.6 kts
20130510T002941 ssmis17 12.2 39.7% 0.0 -0.0 n/a   42.9 kts
20130510T114941 ssmis16 190.1 20.6% 2.2 -2.2 n/a   37.0 kts
20130510T211332 tmi 212.4 NaN% NaN NaN n/a   35.0 kts
20130510T225749 ssmis16 179.0 NaN% NaN NaN n/a   35.0 kts
20130511T001701 ssmis17 156.8 0.0% 3.2 -3.2 n/a   35.0 kts
20130511T102645 tmi 156.8 0.0% 1.4 -1.4 n/a   31.9 kts
20130511T113612 ssmis16 156.8 0.0% 0.1 -0.1 n/a   30.5 kts
20130511T132204 ssmis18 90.1 0.0% 0.0 -0.0 n/a   28.3 kts
20130511T201817 tmi 5.0 34.2% 0.0 -0.0 n/a   25.0 kts
20130511T214039 ssmi15 156.8 0.0% 1.7 -1.7 n/a   25.0 kts
20130512T093132 tmi 112.3 0.0% 1.4 -1.4 n/a   25.0 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).