Very impressive. Looks like 13 of the top hourly heat indices at Joplin, Missouri have been set or tied within the past 24 hours. Officially, the 125F heat index from yesterday was not the highest on record. But I'd say the readings from June 1987 and August 1999 are somewhat suspect, since there are no other hourly readings from those dates that were records. For that matter, the 117F at 9 am from 7/16/1986 is suspicious too. Regardless, one of the highest heat index readings on record. And cer