Date/Time Sat MW Eye diam (km) Est RMW (km) Ring % Tb diff (K) Score Meaning NHC estimate
19990828T011800 ssmi14_85 77.7 33.9 46.6% 22.8 22.8 >65 kts   71.1 kts
19990828T111900 ssmi13_85 66.6 33.9 NaN% NaN NaN n/a   83.6 kts
19990828T134700 ssmi14_85 88.8 39.5 34.3% 20.2 20.2 >65 kts   86.5 kts
19990828T173400 tmi_85 177.6 83.9 100.0% 33.9 48.9 >65 kts   89.6 kts
19990828T223800 ssmi13_85 199.8 95.1 31.4% 17.4 17.4 n/a   90.0 kts
19990829T110600 ssmi13_85 122.1 61.7 49.3% 24.3 24.3 >65 kts   90.0 kts
19990829T113200 tmi_85 555.0 61.7 64.4% 22.5 22.5 >65 kts   90.0 kts
19990829T162100 tmi_85 111.0 50.6 27.4% 11.1 11.1 n/a   90.0 kts
19990829T222600 ssmi13_85 77.7 33.9 11.0% 16.0 16.0 n/a   90.0 kts
19990830T115600 tmi_85 421.8 122.9 NaN% NaN NaN n/a   85.1 kts
19990830T133300 tmi_85 77.7 33.9 16.4% 7.0 7.0 n/a   85.0 kts
19990830T150900 tmi_85 55.5 22.8 8.2% 7.1 7.1 n/a   85.0 kts
19990830T221500 ssmi13_85 555.0 72.8 4.1% 2.6 2.6 n/a   81.5 kts
19990831T122100 tmi_85 510.6 156.2 NaN% NaN NaN n/a   74.7 kts
19990831T135700 tmi_85 555.0 161.8 NaN% NaN NaN n/a   73.4 kts
19990831T220200 ssmi13_85 444.0 150.7 0.0% 7.3 7.3 n/a   63.3 kts
19990901T110800 tmi_85 133.2 67.3 16.4% 1.4 -1.4 n/a   50.7 kts
19990901T124400 tmi_85 55.5 33.9 0.0% 1.8 -1.8 n/a   50.0 kts
19990901T143500 ssmi14_85 199.8 11.7 0.0% 0.9 -0.9 n/a   50.0 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).