DES MOINES —The average rainfall for the state was 2.5 inches for the past two weeks, yet extreme northwest Iowa moved from abnormally dry conditions to moderate drought, reports the Water Summary Update published May 9.
The situation is revealed in year-to-date precipitation: The far northwest is more than four inches below normal, while north central portions of the state are at three inches above normal.
Average stream flows are gradually increasing, with no “spikes.” This indicates that rainfall is soaking into the ground, and not running off the surface into streams.
For a more thorough review of Iowa’s water resource trends April 23 through May 7, go to http://www.iowadnr.gov/watersummaryupdate
The report is prepared by the technical staff from the Iowa DNR, the Iowa Department of Agriculture and Land Stewardship, IIHR—Hydroscience and Engineering and the U.S. Geological Survey, in collaboration with The Iowa Homeland Security and Emergency Management Department.