30 Day Precip Anomaly: Mississippi & Ohio Rivers


For those from far away, the bright magenta area denotes over 8″ or about 20 cm anomaly, and the area with that large of an anomaly is clearly larger than the area of Great Britain and comparable to that of France. It’s almost entirely in the Mississippi watershed and this water will shortly present challenges to the complex flood control system around New Orleans.


  1. Been thinking about flood statistics and it reminded me that when I started paying attention to world weather I was startled by the difference in what counts as a flood in different regions. 11 inches in India or Indonesia is a flood but AFAIK not so very unusual (and/or getting less so). Here in Boston something a little short of 3 inches is pretty serious.However, in the last decade, the normal flood in all regions that have floods has become much bigger and more frequent. I can see where extreme storms break the mold, but their precipitation data should be possible to fold in with other kinds of floods. I'm sure this, being obvious, is a case of grandma and eggs, what wotthehell, mizewell say it.I don't see how that statistic can be ignored, but the fake skeptics are all over it digging out historical records for each and every one.It's the clusters (uck, I hate that ad).

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