Extreme Rainfall Events In The USA
By Paul Homewood
NOAA have a useful website for keeping track of state records for temperature, rainfall etc. One of the parameters is for “24 hour precipitation”. These are for discrete 24 hour periods, and not specifically “daily records”.
We often hear, of course, that extreme weather is on the increase, and certainly heavy rainfall is commonly referred to as an example. So what do NOAA’s figures actually say?
It appears that the 1990’s claim the record for most state records with 10. By contrast the latest decade seems to be perfectly normal with just 4 records set – Minnesota, Nevada, Oregon and South Dakota.
The early years in the record are, I suspect, not comparable because of a lack of reporting stations and a lack of detailed hourly recordings in many of the stations that did exist. But comparison with post war records show clearly that heavy rainfall events have, if anything, declined.
Once again, alarmist claims simply do not stand up on examination of the facts.
The NOAA list is here – http://www.ncdc.noaa.gov/extremes/scec/