Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20201220T085307 ssmis16_85 333.0 45.0 4.1% 1.4 -1.4 n/a   30.0 kts
20201220T090154 ssmis18_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20201220T103853 ssmis17_85 66.6 28.4 8.2% 1.7 -1.7 n/a   30.0 kts
20201220T231628 ssmis17_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20201221T055211 amsr2_85 333.0 161.8 NaN% NaN NaN n/a   25.1 kts
20201221T083942 ssmis16_85 244.2 117.3 13.7% 2.8 -2.8 n/a   27.2 kts
20201221T084905 ssmis18_85 255.3 122.9 15.1% 1.8 -1.8 n/a   27.3 kts
20201221T180854 amsr2_85 244.2 106.2 NaN% NaN NaN n/a   30.0 kts
20201221T211851 ssmis16_85 33.3 161.8 NaN% NaN NaN n/a   30.0 kts
20201221T212814 ssmis18_85 22.2 2.5 0.0% 0.9 -0.9 n/a   30.0 kts
20201221T230354 ssmis17_85 22.2 11.7 NaN% NaN NaN n/a   30.0 kts
20201222T063453 amsr2_85 177.6 83.9 NaN% NaN NaN n/a   25.0 kts
20201222T082633 ssmis16_85 155.4 72.8 12.3% 2.1 -2.1 n/a   25.0 kts
20201222T210605 ssmis16_85 88.8 39.5 15.1% 2.9 -2.9 n/a   21.6 kts
20201222T211610 ssmis18_85 88.8 39.5 12.3% 3.4 -3.4 n/a   21.5 kts
20201223T113909 ssmis17_85 22.2 6.1 0.0% 2.0 -2.0 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.

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).