Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20160316T051139 ssmi15 12.2 65.8% 3.0 -3.0 n/a   35.0 kts
20160316T092741 ssmis18 12.2 67.1% 0.0 -0.0 n/a   35.0 kts
20160316T174515 ssmis16 23.4 68.5% 2.2 -2.2 n/a   33.9 kts
20160316T205819 ssmis17 212.4 NaN% NaN NaN n/a   30.2 kts
20160317T045521 ssmi15 23.4 17.8% 0.0 -0.0 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).