IEM Daily Feature
Thursday, 22 October 2009
Thursday, 22 October 2009
Two Sigma Weather
Posted: 22 Oct 2009 06:12 AM

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Days are not double counted if there was both a two sigma high and low on a given day.
The featured chart plots the number of days per year that experienced
a high or low temperature exceeding two standard deviations from
average for Ames. For example, some of last week's cool high
temperatures in the 40s were two sigma below average. This chart is
an attempt to quantify how "extreme" a given year was. In general,
the highest values were prior to 1940 which is probably a reflection
of the data quality for that period, although the very hot years in
the 1930s show up nicely in this chart.
Voting:
Good = 14
Bad = 5
Tags: high low
Voting:
Good = 14
Bad = 5
Tags: high low