Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20161220T081431 ssmis16 23.4 19.2% 0.0 -0.0 n/a   35.0 kts
20161220T233304 ssmis18 NaN 0.0% 0.0 -920.0 n/a   36.6 kts
20161221T071628 ssmis16 212.4 NaN% NaN NaN n/a   40.6 kts
20161221T225922 ssmis17 NaN 32.9% 0.0 -920.0 n/a   45.0 kts
20161221T225923 ssmis17 NaN 32.9% 0.0 -920.0 n/a   45.0 kts
20161221T232020 ssmis18 NaN 74.0% 0.0 -920.0 n/a   45.0 kts
20161221T232022 ssmis18 NaN 74.0% 0.0 -920.0 n/a   45.0 kts
20161222T190026 ssmi15 NaN 65.8% 0.0 -920.0 n/a   39.6 kts
20161222T204018 ssmis16 NaN 0.0% 0.0 -920.0 n/a   38.9 kts
20161222T224606 ssmis17 190.1 NaN% NaN NaN n/a   38.0 kts
20161222T224607 ssmis17 NaN 17.8% 4.9 -920.0 n/a   38.0 kts
20161222T230756 ssmis18 12.2 75.3% 0.0 -0.0 n/a   37.9 kts
20161222T230757 ssmis18 12.2 75.3% 0.0 -0.0 n/a   37.9 kts
20161223T184435 ssmi15 67.8 23.3% 3.6 -3.6 n/a   30.0 kts
20161223T201634 ssmis16 56.7 13.7% 2.8 -2.8 n/a   30.0 kts
20161223T222126 ssmis17 101.2 0.0% 1.0 -1.0 n/a   29.9 kts
20161223T223035 ssmis17 101.2 0.0% 0.8 -0.8 n/a   29.8 kts
20161223T225536 ssmis18 123.4 0.0% 1.0 -1.0 n/a   29.7 kts
20161223T225537 ssmis18 123.4 0.0% 1.0 -1.0 n/a   29.7 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).