Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20210209T160206 ssmi15_85 33.3 161.8 NaN% NaN NaN n/a   45.0 kts
20210210T011658 amsr2_85 266.4 122.9 4.2% 5.9 -5.9 n/a   43.9 kts
20210210T040857 ssmis16_85 244.2 122.9 17.8% 5.7 -5.7 n/a   41.5 kts
20210210T043054 ssmi15_85 199.8 106.2 NaN% NaN NaN n/a   41.2 kts
20210210T043505 ssmis18_85 199.8 106.2 21.9% 5.2 -5.2 n/a   41.2 kts
20210210T060018 gmi_85 333.0 161.8 NaN% NaN NaN n/a   40.0 kts
20210210T071539 ssmis17_85 321.9 156.2 NaN% NaN NaN n/a   40.0 kts
20210210T152729 ssmis16_85 299.7 145.1 0.0% 1.4 -1.4 n/a   39.7 kts
20210210T154804 ssmi15_85 299.7 145.1 NaN% NaN NaN n/a   39.6 kts
20210210T155317 ssmis18_85 333.0 161.8 NaN% NaN NaN n/a   39.5 kts
20210210T183416 ssmis17_85 277.5 134.0 NaN% NaN NaN n/a   38.0 kts
20210211T035358 ssmis16_85 266.4 128.4 0.0% 3.2 -3.2 n/a   35.0 kts
20210211T041309 ssmi15_85 277.5 134.0 0.0% 2.5 -2.5 n/a   35.0 kts
20210211T042025 ssmis18_85 333.0 161.8 NaN% NaN NaN n/a   35.0 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).