Wind speeds have markedly increased this evening over Iowa with the passage of a cold front. The NWS has a Wind Advisory in place over portions of the state with gusts expected in the 40 to 50 MPH range until morning. The featured chart looks into the frequency of this advisory for Iowa by week of the year with the top panel showing the number of years since about 2005 that have seen at least one event and the bottom panel showing the total number of events. An event is defined by an individual issuance by a NWS forecast office. The chart shows that April is clearly the most active with only July and August being near void of this alert type.

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