Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20130817T192435 ssmi15 90.1 17.8% 2.8 -2.8 n/a   25.0 kts
20130817T195346 tmi 190.1 17.8% 7.2 -7.2 n/a   25.0 kts
20130817T211702 ssmis17 145.7 NaN% NaN NaN n/a   25.0 kts
20130817T232559 ssmis18 156.8 NaN% NaN NaN n/a   24.1 kts
20130818T004732 tmi 179.0 NaN% NaN NaN n/a   23.1 kts
20130818T064201 ssmi15 290.2 5.9% 10.4 -10.4 n/a   20.0 kts
20130818T083913 ssmis16 301.3 NaN% NaN NaN n/a   20.0 kts
20130818T190852 ssmi15 301.3 NaN% NaN NaN n/a   20.0 kts
20130818T203434 tmi 45.6 0.0% 1.4 -1.4 n/a   20.0 kts
20130818T213307 ssmis16 223.5 NaN% NaN NaN n/a   20.0 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).