Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning JTWC estimate
20210802T073810 ssmis17_85 244.2 117.3 2.7% 1.7 -1.7 n/a   26.4 kts
20210802T171018 gmi_85 55.5 161.8 NaN% NaN NaN n/a   30.0 kts
20210802T181046 ssmis16_85 99.9 50.6 4.1% 5.6 -5.6 n/a   30.0 kts
20210802T184525 ssmi15_85 66.6 11.7 8.2% 0.0 -0.0 n/a   30.0 kts
20210802T200822 ssmis17_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20210803T060146 ssmi15_85 155.4 72.8 9.6% 5.7 -5.7 n/a   25.0 kts
20210803T063018 gmi_85 66.6 6.1 NaN% NaN NaN n/a   25.0 kts
20210803T152908 amsr2_85 255.3 122.9 NaN% NaN NaN n/a   21.4 kts
20210803T182838 ssmi15_85 122.1 56.1 0.0% 1.0 -1.0 n/a   20.0 kts
20210803T191441 ssmis18_85 22.2 6.1 0.0% 2.3 -2.3 n/a   20.0 kts
20210803T213509 ssmis17_85 321.9 156.2 NaN% NaN NaN n/a   20.0 kts
20210804T054647 ssmi15_85 333.0 161.8 NaN% NaN NaN n/a   20.0 kts
20210804T063416 ssmis18_85 299.7 145.1 NaN% NaN NaN n/a   20.0 kts
20210804T065730 ssmis16_85 11.1 2.5 0.0% 3.4 -3.4 n/a   20.0 kts
20210804T085436 ssmis17_85 11.1 2.5 0.0% 0.4 -0.4 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).