Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120110T220823 ssmis16 212.4 5.5% 5.1 -5.1 n/a   38.1 kts
20120111T001550 ssmis18 12.2 75.3% 0.0 -0.0 n/a   40.2 kts
20120111T104213 ssmis16 212.4 15.1% 2.6 -2.6 n/a   54.0 kts
20120111T122147 ssmis18 12.2 74.0% 0.0 -0.0 n/a   55.0 kts
20120111T214112 ssmis17 -919.0 -999.0% -999.0 -909.0 n/a   47.2 kts
20120111T215614 ssmis16 12.2 100.0% 12.1 -27.1 n/a   47.0 kts
20120112T000417 ssmis18 12.2 75.3% 0.0 -0.0 n/a   44.9 kts
20120112T095800 ssmis16 23.4 87.7% 16.3 -31.3 n/a   36.7 kts
20120112T102507 ssmis17 -919.0 -999.0% -999.0 -909.0 n/a   36.3 kts
20120112T123659 ssmis18 34.5 42.5% 2.9 -2.9 n/a   34.5 kts
20120112T214437 ssmis16 67.8 0.0% 0.9 -0.9 n/a   26.9 kts
20120112T215335 ssmis17 5.0 0.0% 0.4 -0.4 n/a   26.8 kts
20120112T235321 ssmis18 45.6 0.0% 1.1 -1.1 n/a   25.1 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.