Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning NHC estimate
20180510T212140 gmi_85 122.1 67.3 4.1% 3.9 -3.9 n/a   30.0 kts
20180510T215547 amsr2_85 244.2 117.3 10.6% 6.7 -6.7 n/a   30.0 kts
20180511T002511 ssmis16_85 144.3 89.5 9.6% 0.0 -0.0 n/a   30.0 kts
20180511T101041 amsr2_85 77.7 33.9 16.4% 3.6 -3.6 n/a   30.0 kts
20180511T130219 ssmis16_85 333.0 161.8 NaN% NaN NaN n/a   30.0 kts
20180511T145505 ssmis17_85 33.3 161.8 NaN% NaN NaN n/a   30.0 kts
20180511T233930 ssmi15_85 77.7 33.9 0.0% 3.0 -3.0 n/a   25.0 kts
20180512T001222 ssmis16_85 77.7 33.9 0.0% 3.5 -3.5 n/a   25.0 kts
20180512T025730 ssmis18_85 188.7 89.5 6.8% 5.9 -5.9 n/a   25.0 kts
20180512T094140 gmi_85 122.1 56.1 11.0% 6.1 -6.1 n/a   23.5 kts
20180512T124850 ssmis16_85 55.5 22.8 0.0% 5.1 -5.1 n/a   22.2 kts
20180512T214415 amsr2_85 11.1 2.5 0.0% 5.9 -5.9 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).