Precipitation in Iowa falls below average for first time since June


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Streamflow remains above average for much of northeastern Iowa as the state heads into the driest season of the year. (Iowa DNR)
Jenna Ladd | November 8, 2016

The Iowa Department of Natural Resources (DNR) recently released its latest Water Summary Update. Each update provides an overview of the status of Iowa’s water resources using four categories: precipitation, streamflow, drought, and shallow groundwater. The latest update provides a water resource snapshot of trends from October 10 through November 3.

As Iowa heads into the driest season of the year, stretching from November through February, October was recorded as the first month since June in which rainfall fell below normal levels. “Abnormally dry,” or drought conditions persisted for south-central Iowa, with the lowest reported October rainfall of 0.54 inches recorded in Story County. Areas of north central and northeastern Iowa, which had experienced heavy rainfall throughout much of September, saw drier conditions at last.

Temperatures throughout the month of October were warmer than they have been since 2007, averaging about 4.5 degrees above normal. This season’s first freeze is yet to occur for the Des Moines metro area, as well as far eastern and southeastern Iowa. The northwest two-thirds portion of the state experienced its first deep freeze on October 13.

Since the previous Water Summary Update, streamflow in the Chartion River Basin in south central Iowa has decreased to normal levels. However, streamflow for most of Iowa remains above average. More specifically, streamflow in the Cedar, Des Moines, and Upper Iowa River basins remain far above average. The forthcoming four months not only mark the driest season of the year, but also the most hydrologically stable. During this period of time Iowa usually receives about 15 percent of the year’s total rainfall, or 5.5 inches of precipitation. In contrast, summer months in the state bring more than 18 inches of precipitation on average.

Water Summary Updates are released every two weeks or as water resource conditions in Iowa significantly change. They are prepared by the Iowa DNR in partnership with Iowa Department of Agriculture and Land Stewardship, the U.S. Geological Survey, and The Iowa Homeland Security and Emergency Management Division. A complete record of Iowa Water Summary Updates can be found here.

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(Iowa DNR)

Iowa scientists urge action on Climate-Smart Agriculture


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 Jake Slobe | October 5, 2016

Iowa researchers and educators at nearly every college and university in the state have produced annual statements describing the real impacts Iowans are experiencing from climate change.

Released today, the sixth annual statement titled, “Iowa Climate Statement 2016: The Multiple Benefits of Climate-Smart Agriculture,” was signed by 187 science faculty and researchers from 39 Iowa colleges and universities. Listen to the statement here:

This year’s climate statement comes shortly after a month of heavy rain and flooding throughout Iowa.

Director of  Environmental Science and Policy Program at Drake University David Courard-Hauri has been involved with the Iowa Climate Statement since its inception in 2011. He says,

“Iowa’s recent extreme rainfall events and flooding reminds us that climate change is real and needs to be addressed on both the farm and in our communities.” 

This year’s statement illustrates the need and benefits of more widespread adoption of proven soil conservation practices. Specifically, it discusses U.S. Department of Agriculture (USDA), Tom Vilsack’s initiative, Building Blocks for Climate-Smart Agriculture. The USDA plans to implement climate-smart agriculture primarily by increasing incentive-based programs allowing farmers to confront these challenges head on.

Co-director of the UI Center for Global and Regional Environmental Research Jerry Schnoor said that Iowan farmers are beginning to experiencing real impacts from climate change in the forms heavier rains, increased flooding and soil erosion.

“We believe Iowa should play a leadership role in this vital effort, just as our state has already done for wind energy.  We urge our representatives to help Iowa’s innovative farmers and land managers establish a multi-faceted vision for land stewardship by vigorously implementing federal, state, and other conservation programs.” 

More information about this year’s climate statement as well as all previous Iowa climate statements can be found here.

On The Radio – Iowa experienced unusually warm and wet conditions in 2015


Storm clouds roll through Polk County south of near Elkhart in November 2015. (Carl Wycoff/Flickr)
Storm clouds roll through Polk County south of near Elkhart in November 2015. (Carl Wycoff/Flickr)
Nick Fetty | February 1, 2016

This week’s On The Radio segment looks at unusually high temperatures and precipitation levels that Iowa experienced at the end of 2015.

Transcript: Warm fall and winter

While global temperatures continued to set records, Iowa experienced an unusually warm and exceedingly wet winter in 2015.

This is the Iowa Environmental Focus.

The United States Department of Agriculture reports that between August 31 and December 31, only 25 days recorded below average temperatures in Iowa. Temps during that period were 5.8 degrees Fahrenheit above normal, the warmest for that period since 1931.

Iowa also experienced by far its wettest December ever in both rain and snow, with a single storm system in mid-December shattering the records set by most winter months since record keeping started in 1873. Grundy Center’s 8.2 inches of precipitation dwarfed its previous December record of 3.7 inches set in 1982, while Des Moines’ 5.4 inches broke its previous record of 3.7 inches set in 1931. This continued a trend of unpredictability in weather patterns – which even included the first ever recorded tornado warnings in December. The heavy precipitation contributed to devastating flooding downstream from Missouri to Texas.

For more information about Iowa weather, visit IowaEnvironmentalFocus.org.

From the UI Center for Global & Regional Environmental Research, I’m Betsy Stone.

No doubt: Iowa is getting wetter


Gene Takle

In case you missed it last Sunday, the Cedar Rapids Gazette gave a huge front-page spread to a piece that lays out some sobering data on Iowa’s recent trends in precipitation – much of it supplied by CGRER’s own Gene Takle at Iowa State.

Here’s a rundown of some of those key stats, as cited by the article:

  • The past three years have been the wettest 36 month period in the 138 years that Iowa has been keeping records. We beat the old record, set between 1990-1993, by about 10 inches of precipitation.
  • 2007 was the state’s fifth-wettest year; 2008, the fourth wettest; 2009 was the 11th wettest; and 2010 is on track to become the second-wettest year in state history.
  • From 1875 to 1950, Iowa had only two years with more than 40 inches of precipitation. Since 1950, the state has recorded eight such years, and this year likely will be the ninth.
  • Since 1910, days with more than 4 inches of precipitation have increased 50 percent in the Upper Midwest
  • During the late 1800s, Cedar Rapids averaged 4.2 days a year with precipitation of 1.25 inches or more – the amount at which runoff to streams typically becomes significant. By 2008, that figure had risen to 6.6 days per year, a 57 percent increase.

We also know that flooding in Ames and other areas in Iowa were worse this year than in the epically soggy 1993.  And June 2010 was the second wettest month in state history.

So does this weather seem to be the “new normal” as Gov. Chet Culver and others have described it? It’s hard to argue otherwise.