Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20161109T200503 ssmis18 179.0 NaN% NaN NaN n/a   30.0 kts
20161109T202021 ssmis17 NaN 74.0% 0.0 -920.0 n/a   30.0 kts
20161110T040035 ssmi15 101.2 0.0% 7.4 -7.4 n/a   30.0 kts
20161110T045617 ssmis16 23.4 6.8% 2.6 -2.6 n/a   30.0 kts
20161110T073105 ssmis17 179.0 1.4% 5.7 -5.7 n/a   30.0 kts
20161110T163321 ssmi15 45.6 41.1% 11.4 -11.4 n/a   30.0 kts
20161110T174042 ssmis16 45.6 57.5% 0.1 -0.1 n/a   30.0 kts
20161110T200649 ssmis17 NaN 57.5% 0.0 -920.0 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).