Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20120618T032937 tmi 101.2 50.7% 1.6 -1.6 n/a   39.3 kts
20120618T085432 ssmi15 256.8 NaN% NaN NaN n/a   45.0 kts
20120619T023441 tmi 134.5 13.7% 3.3 -3.3 n/a   45.0 kts
20120619T081434 ssmi15 179.0 12.3% 3.3 -3.3 n/a   46.6 kts
20120619T190619 tmi 245.7 0.0% 3.5 -3.5 n/a   45.0 kts
20120620T013932 tmi 234.6 27.4% 1.6 -1.6 n/a   45.0 kts
20120620T080009 ssmi15 290.2 NaN% NaN NaN n/a   44.2 kts
20120620T181215 tmi 201.2 NaN% NaN NaN n/a   29.8 kts
20120621T004445 tmi 301.3 NaN% NaN NaN n/a   25.0 kts
20120621T082853 ssmis17 112.3 0.0% 4.5 -4.5 n/a   21.7 kts
20120621T185701 tmi 12.2 0.0% 2.6 -2.6 n/a   20.0 kts
20120621T203459 tmi 23.4 0.0% 2.9 -2.9 n/a   20.0 kts
20120621T205559 ssmis16 112.3 0.0% 1.8 -1.8 n/a   20.0 kts
20120621T205613 ssmis17 112.3 0.0% 2.3 -2.3 n/a   20.0 kts
20120621T221306 tmi 112.3 27.4% 1.9 -1.9 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.