Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20130409T022225 tmi 34.5 39.7% 19.6 -19.6 n/a   36.6 kts
20130409T084800 ssmi15 12.2 67.1% 8.6 -8.6 n/a   41.9 kts
20130409T112221 ssmis17 12.2 100.0% 14.0 -29.0 n/a   44.4 kts
20130409T131844 ssmis18 12.2 100.0% 12.8 -27.8 n/a   46.4 kts
20130409T223304 ssmis17 12.2 90.4% 6.0 -21.0 n/a   58.0 kts
20130409T225244 ssmis16 5.0 NaN% NaN NaN n/a   58.4 kts
20130410T002424 ssmis18 12.2 100.0% 19.4 34.4 >65 kts   60.6 kts
20130410T012707 tmi 12.2 100.0% 26.4 41.4 >65 kts   62.4 kts
20130410T083126 ssmi15 NaN 75.3% 0.0 -920.0 n/a   77.0 kts
20130410T110824 ssmis17 5.0 84.9% 0.0 0.0 n/a   79.8 kts
20130410T222005 ssmis16 12.2 49.3% 0.0 0.0 n/a   62.4 kts
20130410T222057 ssmis17 23.4 65.8% 0.0 0.0 n/a   62.4 kts
20130411T003706 ssmis18 90.1 42.5% 0.0 0.0 n/a   59.3 kts
20130411T081449 ssmi15 212.4 NaN% NaN NaN n/a   53.2 kts
20130411T104554 ssmis17 78.9 0.0% 0.0 -0.0 n/a   51.2 kts
20130411T124545 ssmis18 201.2 0.0% 5.4 -5.4 n/a   49.2 kts
20130411T220911 ssmis17 34.5 0.0% 0.3 -0.3 n/a   35.7 kts
20130411T220957 ssmis16 45.6 0.0% 0.1 -0.1 n/a   35.7 kts
20130412T002615 ssmis18 23.4 0.0% 0.0 -0.0 n/a   35.0 kts
20130412T011502 tmi 5.0 0.0% 0.3 -0.3 n/a   35.0 kts
20130412T074755 tmi 12.2 0.0% 0.1 -0.1 n/a   31.8 kts
20130412T103926 ssmis17 5.0 0.0% 0.0 -0.0 n/a   27.5 kts
20130412T104649 ssmis16 156.8 2.7% 4.0 -4.0 n/a   27.3 kts
20130412T122715 ssmis18 5.0 0.0% 0.2 -0.2 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).