IEM Daily Feature
Friday, 14 September 2018

Landfalling Hurricanes and Iowa

Posted: 14 Sep 2018 05:34 AM

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landfalls based on HURDAT2 archive
Hurricane Florence has taken its sweet time to make landfall on the eastern coast of the US. Do landfalling hurricanes impact Iowa weather? The featured chart attempts to address that question by looking at the average temperature departures and precipitation frequencies for Des Moines for a period of days relative to the landfall event. The charts are partitioned by if the hurricane made landfall on the east coast or gulf coast. While the magnitudes are small, a comparison of the impact on temperatures is interesting and would indicate that gulf hurricanes slightly boost temperatures and east coast hurricanes slightly dip temperatures. Our actual weather with Florence isn't exactly following this climatology as temperatures have been above average prior to its landfall. The impact on precipitation does not appear as obvious.

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Tags:   hurricane