Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning NHC estimate
20230915T125409 ssmis18_85 222.0 100.6 16.4% 2.1 -2.1 n/a   25.0 kts
20230915T144628 ssmis16_85 277.5 134.0 NaN% NaN NaN n/a   25.0 kts
20230916T015801 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   25.0 kts
20230916T021614 gmi_85 233.1 2.5 0.0% 0.9 -0.9 n/a   25.0 kts
20230916T032824 ssmis17_85 288.6 139.5 11.0% 4.3 -4.3 n/a   25.0 kts
20230916T143343 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20230916T160416 ssmis17_85 321.9 156.2 NaN% NaN NaN n/a   30.0 kts
20230916T222929 amsr2_85 310.8 150.7 NaN% NaN NaN n/a   29.2 kts
20230917T013309 ssmis18_85 55.5 22.8 0.0% 4.2 -4.2 n/a   27.5 kts
20230917T031509 ssmis17_85 66.6 28.4 0.0% 2.4 -2.4 n/a   26.5 kts
20230917T104321 amsr2_85 11.1 2.5 0.0% 7.6 -7.6 n/a   25.0 kts
20230917T143615 gmi_85 199.8 95.1 NaN% NaN NaN n/a   25.0 kts
20230917T155112 ssmis17_85 255.3 122.9 4.5% 2.4 -2.4 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).