Date/Time Sat Diameter (km) Ring % Tb diff (K) Score Meaning NHC estimate
19980918T113720 ssmi14_85 34.5 38.4% 13.2 13.2 n/a   84.7 kts
19980918T205020 ssmi13_85 12.2 80.8% 18.7 18.7 n/a   90.0 kts
19980919T110152 ssmi11_85 45.6 100.0% 60.0 75.0 >85 kts# 107.6 kts
19980920T001730 ssmi14_85 34.5 100.0% 46.2 61.2 >85 kts# 130.2 kts
19980920T125259 ssmi14_85 23.4 41.1% 18.2 18.2 n/a   127.8 kts
19980921T215633 ssmi13_85 67.8 100.0% 42.0 57.0 >65 kts   99.9 kts
19980921T232832 ssmi11_85 34.5 100.0% 43.3 58.3 >65 kts   92.6 kts
19980922T103056 ssmi13_85 45.6 100.0% 41.4 56.4 >65 kts   102.5 kts
19980922T120228 ssmi11_85 45.6 100.0% 59.1 74.1 >85 kts# 104.9 kts
19980923T012235 ssmi14_85 78.9 100.0% 28.4 43.4 >65 kts   68.9 kts
19980923T135622 ssmi14_85 112.3 22.2% 10.1 10.1 n/a   65.0 kts
19980924T011051 ssmi14_85 123.4 26.4% 12.4 12.4 n/a   65.0 kts
19980924T134328 ssmi14_85 101.2 39.7% 8.2 8.2 n/a   71.4 kts
19980924T230223 ssmi13_85 101.2 NaN% NaN NaN n/a   79.2 kts
19980925T003033 ssmi11_85 101.2 8.2% 13.0 13.0 n/a   80.4 kts
19980925T113407 ssmi13_85 45.6 63.0% 6.0 6.0 n/a   89.6 kts
19980925T130120 ssmi11_85 56.7 42.5% 7.8 7.8 n/a   90.0 kts
19980925T225100 ssmi13_85 45.6 0.0% 2.2 2.2 n/a   90.0 kts
19980926T001749 ssmi11_85 145.7 13.7% 2.7 2.7 n/a   90.0 kts
19980926T022835 ssmi14_85 212.4 NaN% NaN NaN n/a   90.0 kts
19980926T112123 ssmi13_85 134.5 NaN% NaN NaN n/a   90.0 kts
19980926T145805 ssmi14_85 34.5 32.9% 16.8 16.8 n/a   90.0 kts
19980927T021642 ssmi14_85 23.4 16.4% 5.9 5.9 n/a   95.0 kts
19980927T144544 ssmi14_85 34.5 31.5% 9.0 9.0 n/a   95.0 kts
19980928T020507 ssmi14_85 34.5 5.5% 11.5 11.5 n/a   93.3 kts
19980928T123655 ssmi13_85 45.6 NaN% NaN NaN n/a   87.4 kts
19980928T140014 ssmi11_85 12.2 26.0% 9.5 9.5 n/a   81.7 kts
19980928T143237 ssmi14_85 12.2 75.3% 6.7 6.7 n/a   79.4 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).