Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning NHC estimate
20210618T084433 amsr2_85 177.6 22.8 1.4% 4.3 -4.3 n/a   32.3 kts
20210618T110404 ssmis16_85 99.9 45.0 0.0% 7.3 -7.3 n/a   34.2 kts
20210618T132002 ssmis17_85 177.6 89.5 7.6% 1.3 -1.3 n/a   36.1 kts
20210618T231617 ssmi15_85 155.4 72.8 NaN% NaN NaN n/a   44.4 kts
20210618T232111 ssmis18_85 188.7 89.5 22.2% 6.0 -6.0 n/a   44.5 kts
20210618T233019 gmi_85 188.7 95.1 NaN% NaN NaN n/a   44.6 kts
20210619T115548 ssmis18_85 88.8 39.5 100.0% 32.8 -47.8 n/a   59.9 kts
20210619T202004 amsr2_85 266.4 128.4 NaN% NaN NaN n/a   48.1 kts
20210619T230141 ssmi15_85 255.3 122.9 NaN% NaN NaN n/a   42.2 kts
20210619T230929 ssmis18_85 244.2 117.3 NaN% NaN NaN n/a   41.9 kts
20210620T083031 amsr2_85 177.6 83.9 0.0% 0.7 -0.7 n/a   32.9 kts
20210620T113232 ssmi15_85 333.0 161.8 NaN% NaN NaN n/a   30.4 kts
20210620T114145 ssmis18_85 188.7 89.5 0.0% 2.1 -2.1 n/a   30.3 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).