Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20150723T074125 ssmis16 45.6 13.7% 2.8 -2.8 n/a   25.0 kts
20150723T100139 ssmis17 67.8 11.0% 0.3 -0.3 n/a   25.0 kts
20150723T100902 ssmis19 67.8 11.0% 1.1 -1.1 n/a   25.0 kts
20150723T104621 ssmis18 123.4 19.2% 2.3 -2.3 n/a   25.0 kts
20150723T184017 ssmi15 134.5 19.2% 4.8 -4.8 n/a   25.0 kts
20150723T223538 ssmis17 56.7 8.2% 0.0 -0.0 n/a   25.0 kts
20150723T224551 ssmis19 56.7 9.6% 2.6 -2.6 n/a   25.0 kts
20150724T055153 ssmi15 90.1 4.1% 0.3 -0.3 n/a   40.0 kts
20150724T080306 ssmis16 134.5 15.1% 2.6 -2.6 n/a   40.0 kts
20150724T090849 ssmis17 190.1 5.5% 8.4 -8.4 n/a   40.0 kts
20150724T095851 ssmis19 167.9 15.1% 5.9 -5.9 n/a   40.0 kts
20150724T111148 ssmis18 23.4 30.1% 4.8 -4.8 n/a   40.0 kts
20150724T182417 ssmi15 56.7 23.3% 8.4 -8.4 n/a   38.8 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).